Public bug reported:
Hello,
For quite some time I've been experiencing problems with Ubuntu after
resume from suspend. I have an Asus M70SR notebook with ATI Radeon
Mobility HD3470 and using the open-source driver for it (from Quantal
official repository). Currently I have Ubuntu 12.10 installed, but the
same was happening before with 12.04. It doesn't matter if I use Unity,
Gnome-Shell or Gnome Classic - the slow down is always there. My
/etc/X11/xorg-conf looks like this:
Section "Device"
Identifier "ATI Radeon 3470HD"
Driver "ati"
Option "AccelMethod" "EXA"
Option "AccelDFS" "true"
Option "EnablePageFlip" "true"
Option "SwapbuffersWait" "off"
Option "ColorTiling" "on"
Option "ColorTiling2D" "on"
EndSection
To give you some picture about it:
Glxgears BEFORE suspend:
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: option value of option vblank_mode ignored.
4007 frames in 5.0 seconds = 801.315 FPS
3867 frames in 5.0 seconds = 773.359 FPS
3918 frames in 5.0 seconds = 782.475 FPS
3879 frames in 5.0 seconds = 774.902 FPS
3859 frames in 5.0 seconds = 771.025 FPS
Glxgears AFTER resume from suspend:
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: option value of option vblank_mode ignored.
519 frames in 5.0 seconds = 103.466 FPS
455 frames in 5.0 seconds = 90.993 FPS
449 frames in 5.0 seconds = 89.738 FPS
553 frames in 5.0 seconds = 110.366 FPS
530 frames in 5.0 seconds = 105.835 FPS
As you can see the performance after resume from suspend is about 1/8th
of the normal. The workaround is to kill the X server (Ctrl-Alt-
Backspace) and login again, the problem is gone then. However, it's
quite annoying to have to close all open apps and then reopen them
again.
As you can see, I use vblank_mode=0 option and in Compiz the Vsync is
turned off. The measuring was done from Gnome Classic session, but I can
experience the same slowdown in Unity and in Gnome Shell as well.
Best regards,
Roman Dinga
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: down resume slow suspend
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https://bugs.launchpad.net/bugs/1102318
Title:
Slow system after resume from suspend
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