@ddadap: No, nvidia-460 does not fix this regression. I've just tested
nvidia-driver-460 (460.32.03-0ubuntu0.18.04.1) and I observe that it
still misbehaves exactly as described above for 455: The initial
brightness is unusually dim and cannot be changed by any means. (Also,
just like 455, some pixel garbage appears during mode switch).
Reverting to 450 restores normal brightness functionality.
This regression makes nvidia-460 (and nvidia-455) unusable, and
manifests on multiple modern laptops.
@djve60: FYI, the (still defective) nvidia-460 packages are now available in
the archive, making testing 460 pretty painless at least:
To install 460:
sudo apt install nvidia-kernel-common-460 nvidia-driver-460
To revert to 450:
sudo apt install nvidia-kernel-common-450 nvidia-driver-450
@djve60, I recommend that you go ahead and test 460 that way to
determine whether your P76 sees any benefit or still fails like my X1
Extreme.
** Summary changed:
- no brightness control after update from 450 to 455
+ no brightness control in {455,460} after update from 450
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https://bugs.launchpad.net/bugs/1905591
Title:
no brightness control in {455,460} after update from 450
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