I changed grub parameters so brightness, mic and sound works. Touch pad
is very lagged and touch screen does not recognize the stylus.
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https://bugs.launchpad.net/bugs/1907937
Title:
** Information type changed from Public to Public Security
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https://bugs.launchpad.net/bugs/1907937
Title:
[Ubuntu 20.04 LTS on Lenovo 9i Yoga] Not detecting touch pad, sound
card,
The input mic is also not working.
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https://bugs.launchpad.net/bugs/1907937
Title:
[Ubuntu 20.04 LTS on Lenovo 9i Yoga] Not detecting touch pad, sound
card, touch screen stylus or
Public bug reported:
Touch pad, stylus, sound card not detected. Brightness controls don't
work.
xinput --list
⎡ Virtual core pointer id=2[master pointer (3)]
⎜ ↳ Virtual core XTEST pointerid=4[slave pointer (2)]
⎜ ↳ MOSART Semi. 2.4G