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Odd behavior after upgrading from ubuntu 20.04 to 22.04: pulseaudio, grub, lock screen, standby

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I have a Asus UX305UA Zenbook with an Intel i5-6200 CPU running Ubuntu 22.04 (Kernel 5.17.0). Since upgrading from 20.04 to 22.04 I experience some odd issues which seems each worth opening a question but there must be a joint pattern since I have no issues when upgrading 18.04 -> 20.04.

  • The audio service does not start automatically from time to time. Calling pulseaudio start solves the issue for the session.
  • The brightness can't be adjusted (well and the keys won't work.) If I edit grub (etc/default/grub, GRUB 2.06-ubuntu7) to RUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force acpi_backlight=native i915.enable_psr=0 i915.enable_dc=0 intel_idle.max_cstate=2" I can adjust the brightness and the keys work but the brightness frequently changes at random. With GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor i915.enable_psr=0 i915.enable_dc=0" the brightness doesn't flicker anymore but is permanently turned to maximum.
  • The screen can't be locked. When booting, I need to login as normal but when closing the lit, i.e. putting the laptop in standby, the login is skipped. There seems no way in activating it ("lock screen in standby" is activated.) I'm not even always sure that the system is always put to standby since the battery sometimes is significantly lower after a couple of hours (but well the battery is already at an advanced age)

I just don't want to accept that these issues are just due to the age of the laptop (six years is decent but shouldn't be incompatible). I was wondering if I screwed something when upgrading or if I should just downgrade again.

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