FS#6026 - gnome-screensaver and fglrx

Attached to Project: Arch Linux
Opened by Erik C (Linteg) - Sunday, 17 December 2006, 13:21 GMT
Last edited by Jan de Groot (JGC) - Sunday, 05 August 2007, 16:24 GMT
Task Type Bug Report
Category Packages: Extra
Status Closed
Assigned To Travis Willard (Cerebral)
Architecture All
Severity Medium
Priority Low
Reported Version 0.7.2 Gimmick
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Fglrx gives horrible performance with gnome-screensaver, even simple opengl screensavers like GLForestFire lag horribly. The opensource ati drivers work great however, no lag whatsoever. The combination fglrx + xscreensaver also works great without any lag at all.

fglrxinfo
display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: RADEON X800 XL Generic
OpenGL version string: 2.0.6234 (8.32.5)
fgl_glxgears gives me ~1500fps and glxgears ~8600fps
This task depends upon

Closed by  Jan de Groot (JGC)
Sunday, 05 August 2007, 16:24 GMT
Reason for closing:  Won't fix
Comment by Roman Kyrylych (Romashka) - Tuesday, 19 December 2006, 00:06 GMT
OpenGL savers from gnome-screensaver also work bad (even hang system completely) with the latest nvidia drivers and beryl,
so I don't know if this is only fglrx problem.
Comment by Travis Willard (Cerebral) - Tuesday, 19 December 2006, 00:37 GMT
http://gnomesupport.org/forums/viewtopic.php?t=12053
Seems to be not-arch-related, actually. There's evidence of a Gentooer having the same problem... no obvious help though
Comment by Travis Willard (Cerebral) - Monday, 18 June 2007, 13:59 GMT
  • Field changed: Status (Assigned → Waiting on Response)
  • Field changed: Architecture (not specified → All)
  • Field changed: Priority (Normal → Low)
This seems to be a problem with fglrx upstream - probably gnome-screensaver tries to use an OpenGL extension that fglrx doesn't support, and so falls back to the mesa SW implementation, which would be horribly slow and CPU-intensive.

I don't think there's much we can do to fix that, aside from recommending that people who use fglrx stick with xscreensaver.

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