I followed the requested steps.

dkms status:
rtl8812au/4.3.8.12175.20140902+dfsg, 6.14.0-37-generic, x86_64: installed

Initially, linux-generic-hwe-24.04 could not be installed because of
broken dependencies. After fixing that, I successfully installed it and
rebooted into the new kernel.

Current kernel:
6.17.0-35-generic

The system now boots successfully, so the original boot problem is no
longer present.

However, I noticed a new issue with the display brightness.

The backlight device is:
/sys/class/backlight/amdgpu_bl1

After boot, both brightness and actual_brightness are initialized to a
very low value (3122), while max_brightness is 62451. As a result, the
display is much dimmer than it was with kernel 6.14.

Manually setting the backlight to the maximum value immediately restores normal 
brightness:
echo 62451 | sudo tee /sys/class/backlight/amdgpu_bl1/brightness

This suggests that the backlight is initialized to an incorrect value
during boot.

There is also a separate DKMS error for the third-party rtl8812au Wi-Fi driver 
during installation of kernel 6.17. The module fails to build for the new 
kernel.
However, despite this DKMS failure, the system boots correctly into Linux 6.17, 
so this appears to be unrelated to the display brightness issue.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2160563

Title:
  Kernel 6.17.0-29 and 6.17.0-35 fail to boot with VFS unable to mount
  root fs on Lenovo IdeaPad 320-15AST

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.17/+bug/2160563/+subscriptions


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