Chạy Linux thuần thì xem bài này https://tinhte.vn/thread/cai-postmarketos-len-nexus-7-2012-wifi-3g-dung-luong-8gb-16gb-32gb.3179205/ PostmarketOS Nexus 7 2012 wifi 3G rev.E1565 kernel-6.3.0-rc1-postmarketos-grate | Viết bởi LuxiTD Không biết tại sao bài bị xoá, đăng lại link pdf cho ai cần http://www.mediafire.com/file/r37ylhmk7wsb0a4 Link gốc bài bị xoá không rõ nguyên nhân: https://tinhte.vn/threads/cai-postmarketos-len-nexus-7-2012-16gb. tinhte.vn Bài bị xoá không rõ nguyên nhân https://tinhte.vn/threads/cai-postm...2-16gb.3113099/?_xfNoRedirect=1#post-56448223 Nếu không muốn chạy Linux thuần thì có thể chạy dualboot Android và Linux. Cách làm là cài MultiROM của Tasssarda, mà hiện tại link đã die sạch nên chỉ có link này Nexus 7 2012 TWRP MultiROM grouper full package(wifi) https://www.mediafire.com/file/g9dcifft7fv2vfy/grouper.zip/file TWRP MultiROM tilapia full package(3G) https://www.mediafire.com/file/ow77ex66la4rgfr/tilapia.zip/file Nexus 7 2013 TWRP MultiROM deb full package(wifi) https://www.mediafire.com/file/147sntaakt5xk5s/deb.zip/file TWRP MultiROM flo full package(3G) https://www.mediafire.com/file/z0rdlu2cryd3h84/flo.zip/file TWRP_multirom_grouper_20160210.img http://www.mediafire.com/file/jjd0hgtdf4beeji/TWRP_multirom_grouper_20160210.img/file Kernel_kexec_grouper_5.1 cho Android 5.1 http://www.mediafire.com/file/k2a1dp4gtz2skpo/kernel_kexec_grouper_510.zip/file Kernel_kexec_grouper-4.3 cho Android 4.3 http://www.mediafire.com/file/9jnbhoi2jqrck75/kernel_kexec_grouper-430-2.zip/file MultiROM_Manager Apps http://www.mediafire.com/file/r7kk8mono1th619/MultiROM_Manager_v1.188_apkpure.com.apk/file MultiROM core http://www.mediafire.com/file/bsmfixl6rq1j0cn/multirom_v10_n7-signed.zip/file http://www.mediafire.com/file/3uqryjrmyc40jba/multirom-20160207-v33-grouper.zip/file Multirom Full package: http://www.mediafire.com/file/2xbdacvn3v0aetz/multirom-20160207-v33-grouper-full.zip/file Hoặc đây của JT1510365: https://androidfilehost.com/?a=show&w=files&flid=212295 Bắt đầu, root và unlock bootloader bằng tools Nexus root toolkit v2.1.9 của wugfresh https://www.google.com/amp/s/www.wugfresh.com/nrt/amp/ Nexus Root Toolkit v2.1.6 | WugFresh wugfresh.com http://www.mediafire.com/file/d9kssrtg1dtnx3l/NRT_v2.1.9.sfx.zip/file Đưa máy về bootloader và flash TWRP_multirom_grouper_20160210.img bằng $ fastboot flash recovery TWRP_multirom_grouper_20160210.img Vào TWRP chọn install và flash kexec cho kernel 5.1(nếu đang chạy android 5.1) hoặc kexec cho bảng android đang dùng. Nếu muốn cài apps thì khởi động lại cài thêm multirom manager apk để dễ điều khiển trong android Download file mrom từ github Gabriel Couto: https://github.com/gabrielrcouto/nexus7-ubuntu-12-04 GitHub - gabrielrcouto/nexus7-ubuntu-12-04: Ubuntu 12.04 for Nexus 7 (2012) Ubuntu 12.04 for Nexus 7 (2012). Contribute to gabrielrcouto/nexus7-ubuntu-12-04 development by creating an account on GitHub. github.com Dự phòng: http://www.mediafire.com/file/sz83d1vrv8p9d0d/ubuntu-12-04.mrom/file Vào TWRP, chọn MultiROM, chọn Add ROM, chọn *.mrom, chọn Internal memory hoặc usb-otg, chọn file đã download và flash, reboot khi đã xong. Nếu cài vào internal memory, mrom linux sẽ nằm trong /data/media/0/multirom/roms Khởi động vào ubuntu 12.04 và làm theo các bước: 1. Download & install *.mrom to deploy Unbuntu 12.04 LTS, follow his guide to connect wifi, wpa_passphrase to create wpa.conf, wpa_supplicant to connect, then dhclient wlan0(checking connect "ping -c 4 google.com") $ wpa_passphrase the_name_of_your_wifi_network the_passphrase > wpa.conf $ wpa_supplicant -B -Dwext -iwlan0 -cwpa.conf https://github.com/gabrielrcouto/nexus7-ubuntu-12-04/blob/master/README.md nexus7-ubuntu-12-04/README.md at master · gabrielrcouto/nexus7-ubuntu-12-04 Ubuntu 12.04 for Nexus 7 (2012). Contribute to gabrielrcouto/nexus7-ubuntu-12-04 development by creating an account on GitHub. github.com 2. Update linux firmware 3.1.10-8.28-grouper on launchpad.net. Run $ sudo su (id:ubuntu/pass:ubuntu) $ wget http://launchpadlibrarian.net/167650013/linux-image-3.1.10-8-grouper_3.1.10-8.28_armhf.deb Dự phòng: http://www.mediafire.com/file/iuwjj...e-3.1.10-8-grouper_3.1.10-8.28_armhf.deb/file Install linux kernel update. $ dpkg -i linux-image-3.1.10-8-grouper_3.1.10-8.28_armhf.deb $ sudo vi sudoers Add ubuntu user to root ALL permission username ALL=(ALL) ALL Add new repository for Ubuntu ports Precise $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ precise main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ precise-security main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ precise-updates main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ precise-proposed main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ precise-backports main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list Next upgrade last version 12.04.5(Precise) $ apt-get dist-upgrade 3. Upgrade Ubuntu 14.04.6 LTS by editing sources.list, need $root/pass run in terminal $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ trusty main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ trusty-security main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ trusty-updates main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ trusty-proposed main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list $ echo "deb http://ports.ubuntu.com/ubuntu-ports/ trusty-backports main universe restricted multiverse" | sudo tee -a /etc/apt/sources.list Trước khi upgrade nên hold 15 package vì nvidia chỉ hỗ trợ accelerate graphics đến thư viện abi 14 tương đương xorg phiên bản 14. Ubuntu 14.04 Trusty Tahr đòi hỏi abi cho xorg phiên bản 15, nvidia đã không còn hỗ trợ từ abi phiên bản 14 $sudo apt-mark hold libgl1-mesa-dri libxfixes3 libxi6 xserver-xorg-core xserver-xorg-input-evdev xserver-xorg-input-synaptics xserver-xorg-input-wacom xserver-xorg-video-all xserver-xorg-video-ati xserver-xorg-video-fbdev xserver-xorg-video-mach64 xserver-xorg-video-nouveau xserver-xorg-video-r128 xserver-xorg-video-radeon xserver-xorg-video-vesa $ apt-get upgrade After upgrade, I recommend install LXDE/LXDM $ apt-get install lxde lxdm 4. Addons package: install wicd to manage wifi connection,chromium-browser,firefox 57, xfce4-power-manager, onboard virtual keyboard, ubuntu-restricted-extras, xfce4-mixer, ubuntu-tweak, synaptic, indicator-brightness,pavucontrol. Dosbox của odroid: http://www.mediafire.com/file/jjs6rrpkf4u5dpj/dosbox-odroid_0.7.4-3_armhf.deb/file Firefox 57 quantum http://www.mediafire.com/file/oz50ojwu7g01cyz/firefox_57.0%2Bbuild4-0ubuntu0.14.04.5_armhf.deb/file Brightness indicator http://www.mediafire.com/file/qu0wi1onb8mw8w9/indicator-brightness_0.4%7Ebzr11%7Eubuntu14.10.1_all.deb/file Conky config file http://www.mediafire.com/file/pclfc4ioyjrxpbp/conky.conf/file Bleachbit for ubuntu 14.04 http://www.mediafire.com/file/1vn46u6gfee862x/bleachbit_4.0.0_all_ubuntu1404.deb/file Ubuntu Tweak Tool http://launchpadlibrarian.net/167143064/unity-tweak-tool_0.0.6ubuntu1_all.deb Retroarch http://www.mediafire.com/file/1vuq7tj6pb3hfnd/Retroarch_addons.zip/file Sysctl.conf http://www.mediafire.com/file/i4ib163nl1wv8q4/file $ sudo dpkg -i <package name.deb> $ sudo apt-get -f install Quản lý vm trong sysctl, bổ sung 1 ít thông số của Ktweak trên github của tytydraco(xda-developers) Tham khảo: https://github.com/tytydraco/KTweak GitHub - tytydraco/KTweak: A no-nonsense kernel tweak script for Linux and Android systems, backed by evidence. A no-nonsense kernel tweak script for Linux and Android systems, backed by evidence. - tytydraco/KTweak github.com $ nano /etc/sysctl.conf vm.swappiness=100 vm.vfs_cache_pressure=100 vm.min_free_kbytes=3072 vm.mmap_min_addr=6144 vm.user_reserve_kbytes=8192 #default 31979 vm.admin_reserve_kbytes=4096 #default 8192 vm.dirty_background_bytes=20971520 vm.dirty_bytes=41943040 vm.dirty_background_ratio=0 vm.dirty_ratio=0 vm.drop_caches=0 vm.panic_on_oom=1 kernel.panic=10 kernel.panic_on_oops=1 vm.overcommit_memory=0 vm.dirty_writeback_centisecs=500 vm.dirty_expire_centisecs=200 vm.lowmem_reserve_ratio=32 32 vm.oom_kill_allocating_task=1 vm.oom_dump_tasks=0 vm.page-cluster=1 vm.stat_interval=1 vm.highmem_is_dirtyable=0 kernel.threads-max=15507 kernel.shmmax=268435456 kernel.msgmni=2048 kernel.msgmax=64000 kernel.sem=500 512000 64 2048 kernel.sched_child_runs_first=0 kernel.sched_tunable_scaling=0 kernel.sched_latency_ns=10000000 kernel.sched_min_granularity_ns=2250000 kernel.sched_migration_cost=500000 kernel.sched_nr_migrate=4 kernel.sched_wakeup_granularity_ns=2000000 net.ipv4.tcp_ecn=1 net.ipv4.tcp_syncookies=0 net.ipv4.tcp_timestamps=0 net.ipv4.tcp_tw_recycle=1 net.ipv4.tcp_tw_reuse=1 net.ipv4.tcp_wmem=6144 87380 524288 net.ipv4.tcp_rmem=6144 87380 524288 net.core.wmem_max=524288 net.core.rmem_max=524288 $ sudo sysctl -p https://glassonionblog.wordpress.com/2013/01/27/increase-ulimit-and-file-descriptors-limit/ Increasing ulimit and file descriptors limit on Linux Getting “too many open files” errors? Here is how to increase ulimit and file descriptors settings on Linux file-max is the maximum File Descriptors (FD). It is a kernel setting enforced at the system level. ulimit is enforced at the user level.... glassonionblog.wordpress.com https://josetips.wordpress.com/2016/11/04/linux-freeze-on-high-memory-consumption/ Linux freeze on high memory consumption Sometimes when working with virtual images, R or python, I can see that the memory load is really high and then the system becomes completely unresponsive. This post will show you how to optimize memory management in linux so the system does not... josetips.wordpress.com https://blogd.net/linux/cach-tang-so-luong-gioi-han-tep-mo-linux/ Cách tăng số lượng giới hạn tệp mở trong Linux | ./blogd blogd.net $ ulimit -v 15000000 $ sudo nano /etc/security/limits.conf * soft nofile 11903 * hard nofile 11903 * hard as 15000000 5. Note: DO NOT USE "$ apt-get dist-upgrade" in 14.04. The screen will rotate cuz graphic change nvidia terga3 to fbdev_tegra(stable but slow),cus Xorg abi is 15, but nvidia driver stop at abi 14, its a conflict version. To solve this problem, we edit "leafpad /etc/X11/Xorg.conf". Insert Option "Rotate" "CW" on Monitor and 2 Screen defined. Using normal upgrade and install package manually, do not upgrade xserver-xorg-core. We'll stay at xserver 1.11 compatible with nvidia driver abi 11 TransformationMatrix is "1 0 0 0 1 0 0 0 1". Using commandline "gtf 1280 800 0" in terminal to get exactly resolution 1280x800@0hz, edit "HorizSync","VertRefresh","ModeLine" in "Section 'Monitor'" in /etc/X11/xorg.conf Vsync 0 Hsync 0 ModeLine "1280x800x58.6" 68.00 800 824 848 880 1280 1285 1286 1318 (77.3 kHz eP) Install Mojave/Arc_OSX theme and icon, capitan cursor theme for openbox (box-look.org and xfce-look.org)to getting good graphic application 6. Some bugs like freezes, shutdown, restart cuz CPU, GPU, Ram got overheat. So I decide to control frequency, I edit CPU frequency first. Install cpufrequtils, indicator-cpufreq. The maximum CPU frequency is 51Mhz to 1.3Ghz for ondemand. And add your user to system groups $ nano /etc/rc.local sleep 60 #cpufreq-set -g ondemand cpufreq-set --cpu 0 -d 51000 -u 1300000 -g ondemand cpufreq-set --cpu 1 -d 51000 -u 1300000 -g ondemand cpufreq-set --cpu 2 -d 51000 -u 1300000 -g ondemand cpufreq-set --cpu 3 -d 51000 -u 1300000 -g ondemand # Reduce the boost ignore_nice_load to 0 (có hai giá trị 0 và 1) echo 0 > /sys/devices/system/cpu/cpufreq/ondemand/ignore_nice_load # Reduce the boost io_is_busy to q ( có hai giá trị 0 và 1) echo 1 > /sys/devices/system/cpu/cpufreq/ondemand/io_is_busy # Reduce the boost powersave_bias to 0 (giá trị thay đổi từ 0-1000) echo 0 > /sys/devices/system/cpu/cpufreq/ondemand/powersave_bias # Reduce the boost sampling_down_factor to 10 (giá trị thay đổi từ 1-10) echo 10 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor # Reduce the boost sampling_rate to 40000 (giá trị thay đổi từ 10000 - 300000) echo 40000 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate # Reduce the boost sampling_rate_min to 20000 (giá trị thay đổi từ 10000 - 300000) echo 20000 > /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate_min # Reduce the boost threshold to 95% (giá trị thay đổi từ 1-100) echo 95 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold for queue in /sys/block/*/queue do # Choose the first governor available avail_scheds="$(cat "$queue/scheduler")" for sched in cfq noop kyber bfq mq-deadline none do if [[ "$avail_scheds" == *"$sched"* ]] then echo "$sched" > "$queue/scheduler" break fi done # Do not use I/O as a source of randomness echo 0 > "$queue/add_random" # Disable I/O statistics accounting echo 0 > "$queue/iostats" # Reduce heuristic read-ahead in exchange for I/O latency echo 256 > "$queue/read_ahead_kb" # Reduce the maximum number of I/O requests in exchange for latency echo 512 > "$queue/nr_requests" echo 128 > "$queue/max_sectors_kb" echo 2 > “$queue/rq_affinity” done $ nano /etc/init.d/cpufrequtils #Line 42-45 ENABLE="true" GOVERNOR="ondemand" MAX_SPEED=1300000 MIN_SPEED=51000 CPU Hotplugging https://developer.toradex.com/knowl...#Colibri_T20_ApalisColibri_T30_and_Apalis_TK1 CPU (Linux) | Toradex Developer Center This article shows how to enable/disable CPU cores on Toradex modules. It only applies to modules that have more than one core. developer.toradex.com Turn off low-power core migration: #sudo echo Y > /sys/module/cpu_tegra3/parameters/no_lp Turn on automatic CPU hotplugging: $ sudo echo 0 > /sys/module/cpu_tegra3/parameters/auto_hotplug #echo Y > /sys/module/cpu_tegra3/parameters/no_lp echo 37 > /sys/module/cpu_tegra3/parameters/balance_level echo 475000 > /sys/module/cpu_tegra3/parameters/idle_bottom_freq echo 640000 > /sys/module/cpu_tegra3/parameters/idle_top_freq echo 65000 > /sys/kernel/debug/tegra_thermal/shutdown_temp_tj echo 64000 > /sys/kernel/debug/tegra_thermal/throttle_temp_tj echo 1 > /sys/kernel/cluster/immediate echo 1 > /sys/kernel/cluster/force echo 1 > /sys/devices/system/cpu/cpu1/online echo 1 > /sys/devices/system/cpu/cpu2/online echo 1 > /sys/devices/system/cpu/cpu3/online 7. Thiết lập sound card bằng alsamixer, dùng pavucontrol(pulse audio) để khuếch đại âm thanh và cài xfce4-mixer để quản lý alsa sound bằng GUI $ alsamixer Enable các thông số thiết lập (phím M hoặc phím mũi tên lên/xuống): "Speaker R" "Speaker L" "DAC MIXR INF1" "DAC MIXL INF1" "SPOL MIX DAC R1" "SPOL MIX DAC L1" "Stereo DAC MIXR DAC R1" "Stereo DAC MIXL DAC L1" 8. Install bluetooth: i read and researched, compared docs about bluetooth at all time. I realize bluetooth relative with firmware driver/patchram/rfkill/bluez-utils/build-essential/blueman. fw is bcm4330.bin,patchram is brcm_patchram_plus(i get it in ubuntu-defaults-nexus7), i had rfkill/bluez-utils(bluez version 4.01)/blueman to control bluetooth on nexus7 2012 Follow ylixir on: https://docs.google.com/document/u/0/d/1G9vF5v2TN2c6ocyb_hmD1ve7OK4GdCP84rfaXgiLmB4/mobilebasic nexus7setup docs.google.com Dùng Archlinux nhưng vẫn kích hoạt được bluetooth trên ubuntu đc (http://www.mediafire.com/file/9640y9x0wa07jab/arch_20130626.mrom/file Server Tardis source: http://tardis.tiny-vps.com/aarm/repos/2015/12/31/os/tegra Index of /aarm/repos/2015/12/31/os/tegra/ tardis.tiny-vps.com Tardis Repository: http://tardis.tiny-vps.com/aarm/repos/2015/12/31/armv7h/$repo Protofusion repository for ArchLinux ARM rollback: http://mirror.protofusion.org/archlinuxarm-rollback/2013/12/13/armv7h/$repo Bypass Fatal error: kernel too old using $ pacman -Syu Chúc các bạn thành công cài Ubuntu 14.04.6LTS và Archlinux lên Nexus 7 và dual boot cùng Android optimize chromium trong chrome://flags https://www.techidence.com/30-google-chrome-flags-to-improve-browser-speed/ $ leafpad /usr/share/applications/chromium.desktop Sửa dòng Exec = chromium-browser %U thành Exec = chromium-browser --enable-pinch --force-device-scale-factor=1.25 --use-gl=egl --ppapi-flash-path=/usr/lib/chromium-browser/plugins/libpepflashplayer.so --ppapi-flash-args=enable_stagevideo_auto=0 --ppapi-flash-version=12.0.0.77 --password-store=detect --user-data-dir --max-tiles-for-interest-area=512 --num-raster-threads=4 --default-tile-height=512 --enable-features=CheckerImaging --enable-native-gpu-memory-buffers --disk-cache-size=419430400 --flag-switches-begin --blink-settings=disallowFetchForDocWrittenScriptsInMainFrame=true --enable-experimental-canvas-features --enable-experimental-fullscreen-exit-ui --enable-experimental-web-platform-features --enable-fast-unload --enable-gpu-rasterization --javascript-harmony --enable-quic --enable-scroll-prediction --use-simple-cache-backend=on --enable-tcp-fastopen --enable-zero-copy --gpu-rasterization-msaa-sample-count=0 --ignore-gpu-blacklist --enable-lcd-text --num-raster-threads=2 --enable-smooth-scrolling --v8-cache-options=parse --enable-features=CheckerImaging,NoScriptPreviews,OverlayScrollbar,ParallelDownloading,ScrollAnchoring,V8VmFuture --flag-switches-end %U Thêm cache ram lên fstab $ sudo leafpad /etc/fstab tmpfs /home/<username>/.cache/chromium/ tmpfs noatime,nodiratime,nodev,nosuid,mode=1777,size=400 0 0 firefox-esr config gõ about:config vào thanh URL và tìm sửa theo bên dưới: Set browser.download.animateNotifications to False Set security.dialog_enable_delay to 0 Set network.prefetch-next to False (Only on slow internet connections) Set browser.newtabpage.activity-stream.feeds.telemetry to false Set browser.newtabpage.activity-stream.telemetry to false Set browser.ping-centre.telemetry to false Set toolkit.telemetry.archive.enabled to false Set toolkit.telemetry.bhrPing.enabled to false Set toolkit.telemetry.enabled to false Set toolkit.telemetry.firstShutdownPing.enabled to false Set toolkit.telemetry.hybridContent.enabled to false Set toolkit.telemetry.newProfilePing.enabled to false Set toolkit.telemetry.reportingpolicy.firstRun to false Set toolkit.telemetry.shutdownPingSender.enabled to false Set toolkit.telemetry.unified to false Set toolkit.telemetry.updatePing.enabled to false In about:config, set reader.parse-on-load.enabled to False In about:config, set reader.parse-on-load.force-enabled to False In about:config, set browser.pocket.enabled to False In about:config, set loop.enabled to False Scroll down to the first entry labeled "gfx.font," or instead type "gfx.font" in the "Filter" text box at the top of the screen to automatically scroll to the proper section. Locate the "gfx.font_rendering.directwrite.enabled" entry and double-click it to change the value from "False" to "True." 3. Right-click the the entry and click "New." Select the "Integer" option. Type the phrase "mozilla.widget.render-mode" in the "Name" text box and click "OK." Type "6" in the "Value" text box and click "OK." Set browser.cache.disk.enable to false Set browser.cache.memory.enable to true Set browser.cache.memory.capacity to 65536 Set browser.sessionstore.interval to 15000000 Set gfx.font_rendering.cleartype_params.rendering_mode to 5 Create New > Integer > content.notify.interval to 500000 Create New > Boolean > content.notify.ontimer to true Create New > Integer > content.switch.threshold to 250000 Create New > Boolean > content.interrupt.parsing to false Create New > Boolean > javascript.options.jit.chrome to true Create New > Boolean > javascript.options.jit.content to true dom.gamepad.extensions.enabled to false extensions.formautofill.addresses.enabled to false extensions.formautofill.available extensions.formautofill.creditCards.available to false extensions.formautofill.creditCards.enabled to false extensions.formautofill.firstTimeUse to false extensions.formautofill.heuristics.enabled to false extensions.formautofill.section.enabled to false extensions.pocket.api extensions.pocket.enabled to false extensions.pocket.site extensions.screenshots.disabled to true extensions.webcompat-reporter.enabled to false media.navigator.enabled to false media.peerconnection.enabled to false network.http.max-persistent-connections-per-server to 12 geo.enabled to false geo.wifi.uri geo.wifi.xhr.timeout to 1 network.dns.disablePrefetch to true network.prefetch-next to false dom.webnotifications.enabled to false dom.push.enabled to false browser.cache.disk.enable to false browser.cache.offline.capacity to 0 browser.cache.offline.enable to false browser.cache.disk_cache_ssl to false browser.cache.memory.enable to true network.trr.mode to 2 network.trr.uri to https://mozilla.cloudflare-dns.com/dns-query network.security.esni.enabled to true browser.tabs.allowTabDetach value to false Create New > Boolean > dom.image-lazy-loading.enabled to true layout.css.dpi to 0 Create New > Boolean > dom.w3c.touch_events.enable to true general.useragent.site_specific_override to false Create New > String > general.useragent.overrid to Mozilla/5.0 (X11; Linux; Nexus 7) AppleWebKit/537.36 (KHTML, like Gecko) Chromium/65.0.3325.181 Safari/537.36 Verify Integrity của Places Database trong about:support Fix firefox-esr ở 120 DPI chỉnh about:config dòng layout.css.devPixelsPerPx thành 1.25 Trong firefox-esr, mở touch gestures cho firefox-esr bằng cách thêm MOZ_USE_XINPUT2 DEFAULT=1 vào /etc/security/pam_env.conf, vào about:config sửa dom.w3c.touch_events.enabled thành 1. Xem youtube thì cài addons h264ify, nên để ở quality 360p-480p không bị giật và laggy hình. browser.snapshots.limit to 5 browser.gesture.pinch.in to cmd_fullZoomReduce browser.gesture.pinch.out to cmd_fullZoomEnlarge browser.gesture.pinch.latched to false browser.gesture.pinch.threshold to 35 firefox mojave theme: https://github.com/vinceliuice/Mojave-gtk-theme/tree/master/src/other/firefox Mojave-gtk-theme/src/other/firefox at master · vinceliuice/Mojave-gtk-theme Mojave is a macos Mojave like theme for GTK 3, GTK 2 and Gnome-Shell - vinceliuice/Mojave-gtk-theme github.com Move chrome cache và firefox cache đến ramdisk tho link bên dưới: https://www.omgubuntu.co.uk/2010/11/move-google-chrome-cache-to-ramdisk Move Google Chrome Cache to a ram disk and speed up page loading - OMG! Ubuntu Got ample RAM installed? Want to speed up web page loading in Google Chrome? By moving your web cache to a RAM disk you can do just that. "It is possible omgubuntu.co.uk https://askubuntu.com/questions/99506/what-can-i-move-to-ram-drive-to-have-the-system-working-faste What can I move to RAM drive to have the system working faster? Which files/directories can I move to RAM drive to have the system working faster? I'm planning to upgrade my laptop's memory to 8GB soon, so I'll have some fast memory to use. How to configure the askubuntu.com Căn cho các apps chạy QT đúng tỷ lệ màn hình bằng cách thêm QT_SCALE_FACTOR=2 QT_AUTO_SCREEN_SCALE_FACTOR=2 Vào /etc/environment Tạo shortcut xoay màn hình thủ công dùng xrandr, xinput, calibration $ sudo apt-get install xrandr xinput calibration Tạo desktop entries $ nano ~/rotate.desktop [Desktop Entry] Type=Application Terminal=false Icon=btsync-user Name=Rotate Screen Exec=/home/<username>/rotate-screen Name[en_US]=Rotate Screen Tạo file script rotate-screen $ nano ~/rotate-screen #!/bin/sh TouchscreenDevice='elan-touchscreen' if [ "$1" = "--help" ] || [ "$1" = "-h" ] ; then echo 'Usage: rotate-screen.sh [OPTION]' echo echo 'This script rotates the screen and touchscreen input 90 degrees each time it is called,' echo 'also disables the touchpad, and enables the virtual keyboard accordingly' echo echo Usage: echo ' -h --help display this help' echo ' -j (just horizontal) rotates the screen and touchscreen input only 180 degrees' echo ' -n always rotates the screen back to normal' exit 0 fi screenMatrix=$(xinput --list-props "$TouchscreenDevice" | awk '/Coordinate Transformation Matrix/{print $5$6$7$8$9$10$11$12$NF}') # Matrix for rotation # ⎡ 1 0 0 ⎤ # ⎜ 0 1 0 ⎥ # ⎣ 0 0 1 ⎦ right='1 0 0 0 1 0 0 0 1' right_float='1.000000,0.000000,0.000000,0.000000,1.000000,0.000000,0.000000,0.000000,1.000000' #⎡ -1 0 1 ⎤ #⎜ 0 -1 1 ⎥ #⎣ 0 0 1 ⎦ left='-1 0 1 0 -1 1 0 0 1' left_float='-1.000000,0.000000,1.000000,0.000000,-1.000000,1.000000,0.000000,0.000000,1.000000' # 90° to the left # ⎡ 0 -1 1 ⎤ # ⎜ 1 0 0 ⎥ # ⎣ 0 0 1 ⎦ normal='0 -1 1 1 0 0 0 0 1' normal_float='0.000000,-1.000000,1.000000,1.000000,0.000000,0.000000,0.000000,0.000000,1.000000' # 90° to the right #⎡ 0 1 0 ⎤ #⎜ -1 0 1 ⎥ #⎣ 0 0 1 ⎦ inverted='0 1 0 -1 0 1 0 0 1' inverted_float='0.000000,1.000000,0.000000,-1.000000,0.000000,1.000000,0.000000,0.000000,1.000000' if [ $screenMatrix == $normal_float ] && [ "$1" != "-n" ] then echo "90° to the left" xrandr --output LVDS-1 --rotate left xinput set-prop "$TouchscreenDevice" --type=float "Coordinate Transformation Matrix" -1 0 1 0 -1 1 0 0 1 # Remove hashtag below if you want pop-up the virtual keyboard #onboard & elif [ $screenMatrix == $inverted_float ] && [ "$1" != "-j" ] && [ "$1" != "-n" ] then echo "Upside down" xrandr --output LVDS-1 --rotate right xinput set-prop "$TouchscreenDevice" --type=float "Coordinate Transformation Matrix" 1 0 0 0 1 0 0 0 1 #killall onboard elif [ $screenMatrix == $left_float ] && [ "$1" != "-j" ] && [ "$1" != "-n" ] then echo "90° to the right" xrandr --output LVDS-1 --rotate inverted xinput set-prop "$TouchscreenDevice" --type=float "Coordinate Transformation Matrix" 0 1 0 -1 0 1 0 0 1 #killall onboard else echo "Back to normal" xrandr --output LVDS-1 --rotate normal xinput set-prop "$TouchscreenDevice" --type=float "Coordinate Transformation Matrix" 0 -1 1 1 0 0 0 0 1 #killall onboard fi $ sudo chmod +x ~/rotate-screen $ sudo bash ~/rotate-screen Tạo file update_script.sh hoặc gõ từng lệnh dùng quyền sudo su trong terminal $ nano ~/update_script.sh #!/bin/sh chmod -R a+rwX,o-w /home/[username] chown -R [username]:[username] /home/[username] usermod -aG sudo [username] apt-get install systemd-shim echo "session required pam_systemd.so" >> /etc/pam.d/lxdm chmod o+x /usr/lib/dbus-1.0/dbus-daemon-launch-helper apt-get install --reinstall dbus chown -R man:root /var/cache/man chmod 755 /var chmod 755 /var/cache $ sudo chmod +x ~/update_script.sh $ sudo bash ~/update_script.sh Fix con trỏ xoay ngược ở màn hình login Chỉnh cursor xoay đúng với màn hình login: Ví dụ: có cursor theme là thư mục ~/capitaine-cursors $ sudo cp ~/capitaine-cursors /usr/share/icons $ sudo mkdir /usr/share/icons/default $ sudo nano /usr/share/icons/default/index.theme [Icon Theme] Name=Default Comment=Default Cursor Theme Inherits=capitaine-cursors ANDRIOD: ondemand governor: ignore_nice_load=0 io_is_busy=0 powersave_bias=0 sampling_down_factor=1 sampling_rate=10000 sampling_rate_min=10000 up_threshold=95 conservative governor: down_threshold=20 freq_step=5 ignore_nice_load=0 sampling_down_factor=1 sampling_rate=300000 sampling_rate_min=200000 up_threshold=80 interactive governor: above_hispeed_delay=20000 boost=0 boost_factor=0 core_lock_count=0 core_lock_period=200000 go_hispeed_load=85 go_maxspeed_load=99 hispeed_freq=4294967295 input_boost=0 io_is_busy=0 max_boost=0 min_core_keep=2 min_sample_time=0 sustain_load=0 timer_rate=20000 intelliactive governor: above_hispeed_delay=40000 boost=0 boostpulse= boostpulse_duratiom=80000 go_hispeed_load=95 hispeed_freq=1000000 io_is_busy=1 min_sample_time=20000 sampling_down_factor=20000 sync_freq=475000 target_loads=90 timer_rate=10000 timer_slack=40000 two_phase_freq=475000,513000,620000,860000 up_threshold_any_cpu_freq=860000 up_threshold_any_cpu_load=85 UBUNTU: conservative governor: down_threshold=20 freq_step=5 ignore_nice_load=0 sampling_down_factor=1 sampling_rate=300000 sampling_rate_min=200000 up_threshold=80 ondemand governor: ignore_nice_load=0 io_is_busy=0 powersave_bias=0 sampling_down_factor=1 sampling_rate=300000 sampling_rate_min=30000 up_threshold=95 interactive governor: above_hispeed_delay=20000 boost=0 boost_factor=0 go_hispeed_load=85 go_maxspeed_load=85 hispeed_freq=1300000 input_boost=0 io_is_busy=0 max_boost=0 min_sample_time=30000 sustain_load=0 timer_rate=20000 Control CPU frequency match with thermal, using shell scripts https://github.com/Sepero/temp-throttle/tree/4e6fa06ea036129c4a815fc5d4494556578624e1 GitHub - Sepero/temp-throttle at 4e6fa06ea036129c4a815fc5d4494556578624e1 A shell script for throttling system CPU frequency based on a desired maximum temperature - GitHub - Sepero/temp-throttle at 4e6fa06ea036129c4a815fc5d4494556578624e1 github.com TEMPERATURE_PATH="/sys/kernel/debug/tegra_thermal/temp_tj step freq throttle 400000 Low_temp=max_temp -1 sleep 1 $ sh temp_throttle.sh 59 https://www.mediafire.com/file/op6ehqt2fzonsuy/ Archlinux on Nexus7