** Bug watch added: KDE Bug Tracking System #322773 https://bugs.kde.org/show_bug.cgi?id=322773
** Bug watch added: Gentoo Bugzilla #476606 https://bugs.gentoo.org/show_bug.cgi?id=476606 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1174495 Title: Window Managers instability with r600 radeon and high monitor resolutions Status in Compiz: Fix Released Status in Compiz 0.9.9 series: Fix Committed Status in Mesa: Fix Released Status in “cogl” package in Ubuntu: Confirmed Status in “compiz” package in Ubuntu: Fix Committed Status in “kde-workspace” package in Ubuntu: Fix Released Status in “mesa” package in Ubuntu: Confirmed Status in “cogl” source package in Raring: Confirmed Status in “compiz” source package in Raring: Fix Released Status in “kde-workspace” source package in Raring: Fix Released Status in “cogl” source package in Saucy: Confirmed Status in “compiz” source package in Saucy: Fix Committed Status in “kde-workspace” source package in Saucy: Fix Released Bug description: [Impact] KWin 4.10.2 and Compiz 0.9.9 are using MSAA visuals with 13.04's mesa. This is unintended and leads to resource exhaustion which eventually crashes the WM. This affects all users on the r600 with sufficiently sized displays. [Test Case] Run Kwin or Unity with an r600 card, if it does not crash after a while we are happy. [Regression Potential] None, the fix was done by an upstream KWin and Mesa developer plus it has been incorporated into Fedora for a while plus it was used elsewhere in KWin already but not in this specific code path. [Other Info] None. -------------------------------------- I think the version of kwin included in 13.04 contains a known bug as described here: https://bugs.kde.org/show_bug.cgi?id=315089 https://bugs.freedesktop.org/show_bug.cgi?id=61182 My understanding of the problem is as follows: * The Mesa radeon r600 driver recently added support for MSAA GLX visuals * Kwin isn't aware of MSAA properties and happens to (incorrectly) pick MSAA visuals for everything * These visuals occupy a large amount of memory when running at high monitor resolutions * Mesa is "only" capable of mapping 256MB of visuals into CPU address space at once * Kwin's oversize visuals exceeds this limit, resulting in constant crashes The two radeon systems I have both crash immediately after logging in, when running with at a resolution of 2560x1440 and desktop effects enabled. After restarting kwin, a crash can be induced by performing actions that triggers desktop effects/animations. The resulting callstack is attached. ProblemType: BugDistroRelease: Ubuntu 13.04 Package: kde-window-manager 4:4.10.2-0ubuntu2 ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8 Uname: Linux 3.8.0-19-generic x86_64 ApportVersion: 2.9.2-0ubuntu8 Architecture: amd64 Date: Mon Apr 29 19:53:57 2013 InstallationDate: Installed on 2013-04-27 (2 days ago) InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MarkForUpload: TrueSourcePackage: kde-workspace UpgradeStatus: No upgrade log present (probably fresh install) -------------------------------------- Compiz (unity) is affected by the same issue as shown in this stacktrace: http://paste.ubuntu.com/5661055/ To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1174495/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
