Public bug reported: I recenty started to migrate from Lucid (10.04) to Precise (12.04). Unfortunately, I have noticed that the video rendering performance has decreased with Precise. Videos with a resolution of about 720x576 that are played smoothly on Lucid are either flickering or shortly hanging in-between while played on Precise (the standard video player tends more to flickering, in vlc I get hangs). I should mention that I have a quite old graphics card, it is identified by the X server as Chipset: "ATI Radeon VE/7000 QY (AGP/PCI)" (ChipID = 0x5159)
After experimenting around quite a while I found out that I get back the old performance if I boot with "nomodeset", so I guess there's a bug in kernel modesetting. BTW, the output of "uname -a" is Linux faramir 3.2.0-32-generic-pae #51-Ubuntu SMP Wed Sep 26 21:54:23 UTC 2012 i686 athlon i386 GNU/Linux ** Affects: xserver-xorg-video-ati (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/1075296 Title: nomodeset needed for radeon 7000 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1075296/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp