====== Lenovo Thinkpad X200S ======
[[https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X200]]

===== WiFi =====

  * ''Intel Corporation Ultimate N WiFi Link 5300''
  * [[https://wiki.debian.org/iwlwifi|Debian WIKI: iwlwifi]]

==== Issues: ====

Sometimes it stops TXing (on 5GHz band).
<file conf /etc/sysctl.d/ecn.conf>
net.ipv4.tcp_ecn=0
</file>
<code bash>systemctl restart systemd-sysctl</code>


2nd workaround (disable power saving):
<file rule /etc/udev/rules.d/81-wifi-powersave.rules>
ACTION=="add", SUBSYSTEM=="net", KERNEL=="wl*", RUN+="/usr/bin/iw dev $name set power_save off"
</file>

<file conf /etc/modprobe.d/iwlwifi.conf>
option iwlwifi power_save=0
</file>


===== GPU =====

High CPU usage during movie playback in web browser.

i965 in GM45 chipset

<code bash>
sudo apt install vainfo
vainfo

vainfo: VA-API version: 1.10 (libva 2.10.0)
vainfo: Driver version: Intel i965 driver for Intel(R) GM45 Express Chipset - 2.4.1
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointVLD
</code>

<code bash>
sudo apt install intel-gpu-tools
sudo intel_gpu_top
</code>

{{:hw:pasted:20220316-114217.png}}


<code bash>
sudo apt-cache show i965-va-driver-shaders
...
 This package contains also contains the non-free encode shaders for VP8, VP9,
 HEVC and AVC for generation 7.5 hardware or newer.

</code>

<code bash>
sudo apt install libvdpau-va-gl1
</code>

<file conf /etc/X11/xorg.conf.d/20-intel.conf>
Section "Device"
    Identifier "Intel Graphics"
    Driver "intel"
    Option "AccelMethod" "sna"
    Option "TearFree" "true"
    Option "SwapbuffersWait" "false"
EndSection
</file>



===== Fingerprint reader =====

[[https://wiki.archlinux.org/index.php/Fprint|Fprint]]

apt-get install libpam-fprintd fprintd

[[https://wiki.debian.org/SecurityManagement/fingerprint%20authentication]]
<code bash>sudo usermod -a -G plugdev $USER</code>

First run fprintd-enroll, then fprintd-verify

To add a signature for a finger, run

$ fprintd-enroll

or create a new signature for all fingers

$ fprintd-delete "$USER"
$ for finger in {left,right}-{thumb,{index,middle,ring,little}-finger}; do fprintd-enroll -f "$finger" "$USER"; done

sudo pam-auth-update

or


<file|/etc/pam.d/common-auth>

# If you want the fingerprint to be sufficient, add this at the top of the commands (do it multiple times for however many attempts you want to allow):
auth sufficient pam_fprint.so
</file>


===== GSM Modem =====

[[https://wiki.archlinux.org/index.php/USB_3G_Modem]]

==== Software ====
  * wammu / gammu
  * gnokii





=== No sound from docking station ===
Plug-in headset jack and then run command
<code bash>alsactl init
Found hardware: "HDA-Intel" "Conexant CX20561 (Hermosa)" "HDA:14f15051,17aa20ff,00100000" "0x17aa" "0x20f2"
Hardware is initialized using a generic method
</code>