Reset TV Box/Tablet Bios (Intel)

BIOS of Intel Atom Tablet or TV Box are poorly design. You can soft brick if config BIOS incorrectly. Assuming that you are not disable USB port. You could connect USB keyboard to device and enter BIOS. Although it wouldn’t show anything on screen. This is how you might able to un-brick your device. In my case, I soft bricked my Chinese made Intel X5-z8300 TV Box.

  1. Hit “Del” repeatedly about 5-10 sec to enter BIOS. Wait for another 5-10 sec before proceed
  2. Press “F3” then “Enter” (Load Optimized Defaults)
  3. Press “F4” then “Enter” (Save & Exit)

Hope It could help you, too.

TEARING WHEN PLAYBACK VIDEO OR SCROLLING WEBPAGE (Intel Graphics)

Create file
/usr/share/X11/xorg.conf.d/20-intel.conf

or

/etc/X11/xorg.conf.d/20-intel.conf

Check folder first whether which one existed for *buntu mostly /usr/share/X11/xorg.conf.d/

Section "Device"
	Identifier "Intel Graphics"
	Driver "Intel"
		Option "AccelMethod" "sna"
		Option "TearFree" "true"
		Option "DRI" "3"
		Option "TripleBuffer" "true"
		Option "MigrationHeuristic" "greedy"
		Option "Tiling" "true"
EndSection

or

Section "Device"
	Identifier "Intel Graphics"
	Driver "Intel"
		Option "AccelMethod" "uxa"
		Option "DRI" "2"
		Option "TripleBuffer" "true"
		Option "MigrationHeuristic" "greedy"
		Option "Tiling" "true"
EndSection

for Skylake

Section "Device"
	Identifier "Intel Graphics"
	Driver "intel"
		Option "DRI" "false"
EndSection

 

Note

  1. SNA acceleration is default, change to UXA only you encounter pixelated graphics, corrupt text, etc.
  2. “TearFree” doesn’t work with UXA acceleration
  3. by default DRI is 3 change to 2 if you’re using virtual desktops and switching between desktops cause artifacts


References

https://wiki.archlinux.org/index.php/intel_graphics

https://www.x.org/archive/X11R7.5/doc/man/man4/intel.4.html

 

Force KODI to use ALSA

Force load PulseAudio and ALSA at the same time. Buggy, if you set Kodi Audio output to same device as default desktop audio output. In my case, work like charm as my default desktop audio route to HDMI while Kodi using another device.

create file /usr/share/applications/kodi-alsa.desktop and paste this into the file

 

[Desktop Entry]
Version=1.0
Name=Kodi-ALSA
GenericName=Media Center
Comment=Forced Kodi to run on ALSA instead of PulseAudio
Exec=/usr/share/applications/kodi-alsa.sh
TryExec=/usr/share/applications/kodi-alsa.sh
Icon=kodi
Terminal=false
Type=Application
Categories=AudioVideo;Video;Player;TV;

Actions=Fullscreen;Standalone;

Path=
StartupNotify=false

Create file /usr/share/applications/kodi-alsa.sh and paste this into file

#! /bin/bash

# this makes kodi start with ALSA instead of FUCKING pulse audio

# disable pulse audio
pasuspender

# start kodi with ALSA
AE_SINK=ALSA kodi

Set permission so kodi-alsa.sh could be executed.

credit : https://gist.github.com/bmaeser/1918514429e4855d5188

Config PulseAudio

To disable PulseAudio (affect every user)

in /etc/pulse/client.conf

change this line from

; autospawn = yes

to

autospawn = no

To set sample format, check sample spec first by

pacmd list-sinks

Screenshot at 2017-03-02 22:39:29.png

in /etc/pulse/daemon.conf

resample-method = speex-float-5

default-sample-format = float32ne
default-sample-rate = 88200
alternate-sample-rate = 96000
default-sample-channels = 2
default-channel-map = front-left,front-right

Credit:http://kodi.wiki/view/PulseAudio

SSD & Ram Drive Tweak

As my PC has 16GB ram and SSD. I decided to tweak it like this.

In /etc/fstab, for SSD drive I replace “errors=remount-ro” with “errors=remount-ro,noatime,nodiratime,commit=60”

and add these lines to move system tmp and log to Ramdrive

#Create Ram Disk for cache
tmpfs	/var/log	tmpfs	defaults,noatime,nodiratime,size=10M	0	0
tmpfs	/tmp	tmpfs	defaults,noatime,nodiratime,mode=1777,size=50%	0	0

In /etc/rc.local add these lines before exit 0 to create “.cache” folder in /tmp (Ramdrive) and bind its to folder “.cache” of current user. Therefore, all apps caches are moved to Ramdrive. Both Chrome and Firefox are included. Don’t forget to change my_username to your username

for u in my_username my_username1 my_username2; do

	RamDIR0=/tmp/$u/.cache
	HDDDIR0=/home/$u/.cache

	RamDIR1=/tmp/$u/.thumbnails
	HDDDIR1=/home/$u/.thumbnails

	sudo -u $u -- sh -c "mkdir -p $RamDIR0 && mkdir -p $RamDIR1 && chmod -R 700 /tmp/$u"
	mount --bind $RamDIR0 $HDDDIR0
	mount --bind $RamDIR1 $HDDDIR1

done

TCP Tweak

In file /etc/sysctl.conf

# tweak - start
net.core.wmem_max=33554432
net.core.rmem_max=33554432
net.ipv4.tcp_rmem= 10240 87380 33554432
net.ipv4.tcp_wmem= 10240 87380 33554432
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_sack = 1
net.ipv4.tcp_no_metrics_save = 1
net.core.netdev_max_backlog = 5000
# tweak - end

credit: https://www.cyberciti.biz/faq/linux-tcp-tuning/

In file /etc/rc.local

ip link set mtu 7000 dev enp4s0

Set MTU size by add this line

ip link set mtu [supported MTU] dev [NIC]

Check MTU size that your NIC supported first.

sudo ifconfig [NIC] mtu [MTU]