X extremely slow after resume on ATI mobility M4 with DRI
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xserver-xorg-video-ati (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
Running Dapper on a Dell latitude C800 laptop with an ATI Rage Mobility M4, if DRI is enabled I can suspend to ram and resume, but X is painfully slow after resume. It may take a minute or so to repaint the screen (The Xorg process is eating 99%+ CPU). I can switch to console mode and then the response time is OK. If DRI is disabled, everything is fine on resume. I tried several settings in acpi-support, with no change.
While browsing the web I found this page http://
I also noted a mention of a seemingly previous similar report by Andrew Jorgensen in a reply to launchpad #23513. In this reply Andrew points to a bugzilla issue #17342 which is now inaccessible (the same issue number in launchpad has nothing to do with it), so I could not really check further.
Finally, the same kind of unresponsiveness seems to occur on Imacs with the same video card, but in their case, independently of resuming. See issues #23513 and #22667. I wonder if it's related.
bugzilla issue #17342 is Bug #23513 in launchpad which, oddly enough is the very bug I made that comment in. I have no idea why my comment has a link to the bug in it.
I do think this sounds like the same issue. Your find that susepend is simply not supported with this driver looks promising. I would mark this a duplicate but I'd prefer one of the ubuntu engineers have a look first.