On Wed, 2007-12-19 at 08:59 +0100, Michel Dänzer wrote: > On Tue, 2007-12-18 at 08:21 -0400, Zoho Vignochi wrote: > > On Tue, 2007-12-18 at 09:37 +0100, Michel Dänzer wrote: > > > On Mon, 2007-12-17 at 17:34 -0400, Zoho Vignochi wrote: > > > > Package: xserver-xorg-video-ati > > > > Version: 1:6.7.196-2 > > > > Severity: normal > > > > > > > > I use compiz as a window manager and use EXA as the acceleration > > > > method. > > > > If I switch to XAA the effect of the drop shadow is normal however my > > > > desktop becomes very slow, especially scrolling. > > > > > > > > When using EXA everything seems fine except the borders around windows > > > > are drawn improperly. > > > > > > This might be a Mesa driver issue. Can you try upstream Git > > > mesa_7_0_branch, in particular commit > > > 3f18c0a9f27fded8f52a5f0c5b8ad71f71c46aa2 ? > > > > > > If you can't, or if it doesn't help, does setting the shadow radius to a > > > value that isn't a power of two (e.g. 9) work around the problem? > > > > changing the shadow radius did not work around the problem. Also after > > looking closely, the drop shadow on the top panel as well as drop down > > menus (like the menu bar) is drawn correctly. It is just the borders > > around windows do not appear properly. > > Timo Aaltonen provided some additional information on IRC: > > * It also happens on i965, but not on i91/45 > * It doesn't happen with Option "EXANoComposite" (can you confirm > this?) > > Given this, it could be due to EXA RENDER acceleration bugs in the intel > driver (for i965, maybe also i8xx) and the radeon driver (for R200, > maybe also R100). Or, maybe it's a bug in EXA itself, and the relevant > operation happens to fall back to software rendering for the unaffected > cards. > > BTW, do you happen to remember if this problem already occurred with > libgl1-mesa-dri 7.0.1 and/or xserver-xorg-core 1.3?
I can confirm that adding "EXANoComposite" to my xorg.conf resolves the problem. As for confirming the behaviour for previous versions of xserver-xorg and/or mesa, I can only offer that I have had this particular problem for a while but compiz was not in a position to be used on a daily basis so I didn't file any bugs. It now works well on my system now so I reported this bug. So my informed guess is yes it was a problem but I can't definitely confirm. Thanks for your help!
