Public bug reported:
If I leave the login screen unattended the screensaver takes over. Wake
it up and there's an orange overlay screen that can be dragged with the
mouse. However it doesn't drag completely smoothly. It seems that while
the clock and date are still on-screen the drag only achieves about 30
FPS. But after the clock is dragged up off-screen the rendering becomes
smooth (60 FPS).
I find it strange that showing the clock/date text seems to impact
rendering performance so dramatically. And I wonder if it's doing
something silly like re-rendering the text on every frame...
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.0-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
ApportVersion: 2.20.7-0ubuntu2
Architecture: amd64
Date: Thu Oct 5 11:25:36 2017
DisplayManager: gdm3
InstallationDate: Installed on 2017-05-03 (154 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170502)
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gdm3 (Ubuntu)
Importance: Low
Status: New
** Affects: gnome-shell (Ubuntu)
Importance: Low
Status: New
** Tags: amd64 apport-bug artful performance
** Also affects: gdm3 (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
If I leave the login screen unattended the screensaver takes over. Wake
it up and there's an orange overlay screen that can be dragged with the
mouse. However it doesn't drag completely smoothly. It seems that while
the clock and date are still on-screen the drag only achieves about 30
FPS. But after the clock is dragged up off-screen the rendering becomes
smooth (60 FPS).
I find it strange that showing the clock/date text seems to impact
- rendering performance so dramatically.
+ rendering performance so dramatically. And I wonder if it's doing
+ something silly like re-rendering the text on every frame...
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.0-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
ApportVersion: 2.20.7-0ubuntu2
Architecture: amd64
Date: Thu Oct 5 11:25:36 2017
DisplayManager: gdm3
InstallationDate: Installed on 2017-05-03 (154 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170502)
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
** Changed in: gdm3 (Ubuntu)
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1721434
Title:
Lock screen overlay scrolling stutters
Status in gdm3 package in Ubuntu:
New
Status in gnome-shell package in Ubuntu:
New
Bug description:
If I leave the login screen unattended the screensaver takes over.
Wake it up and there's an orange overlay screen that can be dragged
with the mouse. However it doesn't drag completely smoothly. It seems
that while the clock and date are still on-screen the drag only
achieves about 30 FPS. But after the clock is dragged up off-screen
the rendering becomes smooth (60 FPS).
I find it strange that showing the clock/date text seems to impact
rendering performance so dramatically. And I wonder if it's doing
something silly like re-rendering the text on every frame...
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.0-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
ApportVersion: 2.20.7-0ubuntu2
Architecture: amd64
Date: Thu Oct 5 11:25:36 2017
DisplayManager: gdm3
InstallationDate: Installed on 2017-05-03 (154 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170502)
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
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