then4p/yoga_pro_setup.md

## yoga_pro_setup.md

      
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              yoga_pro_setup.md
            
          
    Moved here: https://github.com/then4p/yoga-pro-7-14APH8-linux
Linux on the Lenovo 82Y8 Yoga Pro 7 14APH8 (Gen8) with Ryzen 7 7840HS and Nvidia GTX 4050

Finding a distro

Manjaro was the first distro that worked out of the box with the GPU and prime. Tried KDE Neon and EndeavourOS before but
both had issues with GPU/Prime. I installed Manjaro with the proprietary GPU drivers and can run applications with
prime-run x now.
Additional setup steps on Manjaro

Audio

Connected headphones didn't work. Switching over to pipewire by installing manjaro-pipewire fixes this.
Volume control on the speakers didn't work, they were either off or on 100%. Here's the fix: https://askubuntu.com/a/1204558
Since the switch to pipewire, the conf file is in a different location: /usr/share/alsa-card-profile/mixer/paths/analog-output.conf.common
With the Master block added, headphones did not work. I was able to increase the Master volume using alsamix and then stored the settings with sudo alsactl store.
Power management

Per default Manjaro uses the power-profiles-daemon, I found tlp to offer slightly more
power savings on battery (maybe 1-2W with same applications open). Performance on mains was unaffected. I've set the CPU power policy up a notch as I didn't notice any worse battery life. You can do that with tlpui or in the tlp.conf: CPU_ENERGY_PERF_POLICY_ON_BAT=balance_performance
TLP breaks powerdevil which let you set the performance profile, that didn't really have a big effect anyway.
Biometric auth

Installed howdy and used with these two links: https://wiki.archlinux.org/title/Howdy
https://gist.github.com/pastleo/76597c6ae8f95bb02982fea6df3a3ade
Fix white flickering after suspend/resume

After suspending the laptop or connecting/disconnecting external displays sometimes one or more displays would flicker white or become completely white with just the cursor moving.
The issue is described here: https://gitlab.freedesktop.org/drm/amd/-/issues/2354
Setting amdgpu.sg_display=0 as additional kernel parameter seems to fix this issue.
TODO


Prime is a bit finicky and typical use cases like steam don't automatically select the correct GPU. Also the gamescope microcompositor is currently broken on Nvidia
Volume controls with headphones do not work, adjusting 'bass speaker' in alsamixerfixes this. Probably has to do with the 4 channels used in speaker mode