https://bugs.freedesktop.org/show_bug.cgi?id=34521
Summary: EnableColorTiling causes graphical distortion making X unusable Product: Mesa Version: 7.10 Platform: Other OS/Version: All Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/r600 AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: jamesbroadhead@gmail.com
With EnableColorTiling enabled, when I run certain programs, my X server becomes completely distorted, with screen elements rendering correctly, but in mis-positioned blocks all over the screen. X remains responsive, but I cannot return it to a usable state from the 'bugging' condition. There is no output in dmesg or Xorg.0.log relevant to this.
Setup: Distro: Gentoo Kernels: linux-2.6.36, linux-2.6.37, linux-2.6.38-rc5 Driver : x11-drivers/xf86-video-ati-6.14.0 DDX : r600 (another user in #gentoo had this with r300) Mesa : media-libs/mesa-7.10 (gallium and classic) LibDRM: x11-libs/libdrm-2.4.23 X-Server: x11-base/xorg-server-1.9.4
KMS : Enabled EnablePageFlip : Enabled, Disabled EnableColorTiling: Enabled
I originally encountered this bug with the 'classic' mesa renderer(?), but it affects 'gallium' also.
Reproduction: EnableColorTiling >> /etc/X11/xorg.conf Start X Run Openoffice (Or some in-browser java applets, or Gogglesmm, or some elements of calibre)
Hardware: 01:00.0 VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4850]