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| -rw-r--r-- | src/w/dell-r710.md | 20 | ||||
| -rw-r--r-- | src/w/sun-x4170.md | 3 | ||||
| -rw-r--r-- | src/w/thinkpad-x220.md | 58 |
3 files changed, 81 insertions, 0 deletions
diff --git a/src/w/dell-r710.md b/src/w/dell-r710.md index e69de29..fcd0ae7 100644 --- a/src/w/dell-r710.md +++ b/src/w/dell-r710.md @@ -0,0 +1,20 @@ +title: dell r710 + +## internal ssd + +It is possible to add an additional hard drive or ssd in the chassis. An +optical drive adapter to ssd can be used, or the disk can be manually +installed: + +- Install the ssd in the DVD bay/DVD blank. +- Plug the ssd to the second SATA port in the motherboard. +- Boot to the BIOS and enable the second SATA port to boot on it. + +## quiet fans + +Disable the automatic fan speed, and slows them down to the minimum. + +``` +$ ipmitool -h ${host} ipmi_cmd raw 0x30 0x30 0x01 0x00 +$ ipmitool -h ${host} ipmi_cmd raw 0x30 0x30 0x02 0xff 0x0 +``` diff --git a/src/w/sun-x4170.md b/src/w/sun-x4170.md index e69de29..fbb9aa7 100644 --- a/src/w/sun-x4170.md +++ b/src/w/sun-x4170.md @@ -0,0 +1,3 @@ +title: sun x4170 + +// todo diff --git a/src/w/thinkpad-x220.md b/src/w/thinkpad-x220.md index e69de29..7764308 100644 --- a/src/w/thinkpad-x220.md +++ b/src/w/thinkpad-x220.md @@ -0,0 +1,58 @@ +title: thinkpad x220 + +## performances + +On a linux installation, disabling mitigations can +[considerably increase the performances](https://linuxreviews.org/HOWTO_make_Linux_run_blazing_fast). +However, it comes with serious security issues. + +Add the following parameter for booting your kernel: + +``` +mitigations=off +``` + +## microphone + +The embbeded microphones can generate a static noise. According to the +[Archlinux wiki](https://wiki.archlinux.org/title/Lenovo_ThinkPad_X220#Microphone), +muting the right microphone fix this issue. + +> The following informations are about pulseaudio and its built-in module +> system. A more modern approache would be to use easyeffects. However I +> experienced noisy inputs/outputs while being on calls, and running it in the +> background requires to a) keep the easyeffects window opened b) move +> easyeffects to system tray. + +With pulseaudio/pipewire-pulse, the `remap-source` module can be loaded: + +``` +pactl load-module module-remap-source \ + "source_name=${source_name}" \ + "master=${source_index}" \ + use_master_format=1 \ + master_channel_map=front-left \ + channel_map=mono \ + channels=1 +``` + +However, the fans can still be heard, and not all voip clients handle noise +cancelling. Instead, you can keep the right microphone active and use it for +[noise cancellation](https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules/#module-echo-cancel) +(including the static noise). + +``` +$ pactl load-module module-echo-cancel \ + "source_name=${source_name}" \ + "master=${source_index}" \ + use_master_format=1 \ + aec_method="webrtc" \ + aec_args='"beamforming=1 mic_geometry=-1,0,0,1,0,0"' +``` + +See [my dotfiles](https://git.rgoncalves.se/dots/tree/.config/pipewire) for +additional information. + +## usb-c mod + +// todo |