[Wayland] Screen blanks for a second whenever discrete GPU is powered up
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
GNOME Shell |
New
|
Unknown
|
|||
gnome-shell (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned | ||
mutter (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned |
Bug Description
On this Kaby Lake G laptop, GNOME Shell blanks the screen for a second each time the AMD GPU is powered up. Triggers for powering up include: launching something which loads GL such as Steam or glxinfo, loading the Display configuration page, and so on.
This behaviour does *not* occur with GNOME Shell under X, so it's probably something to do with mutter's KMS interactions.
Because the GPU powers down quite aggressively (I think it's about 5sec without activity) this can be quite annoying :)
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: gnome-shell 3.33.91-1ubuntu1
ProcVersionSign
Uname: Linux 5.1.0+bcachefs.
NonfreeKernelMo
ApportVersion: 2.20.11-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 30 09:48:25 2019
DisplayManager: gdm3
InstallationDate: Installed on 2019-08-29 (0 days ago)
InstallationMedia: Ubuntu 19.10 bcachefs (20190828)
RelatedPackageV
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
Changed in gnome-shell: | |
status: | Unknown → New |
Can you tell if the "blanking" is either:
* The output entering sleep mode; or
* A black frame being accidentally flipped.
I guess checking if the backlight is still on would answer that.