Public bug reported: After installing the latest ati proprietary driver (8.9) under Ubuntu Hardy, I faced several difficulties to properly configure 2 displays (laptop + external EIZO FlexScan S2031W). After reading xrandr related webpages [1] [2] [3] I concluded that the best way is to erase my current xorg.conf file and build it from the scratch.
Finally I managed to get (almost) what I wanted using xrandr. I have a Big Desktop which spans vertically along the 2 displays. All dynamic xrandr commands (like turning on/off a display) as well as screen rotation (I mean orientation) work perfectly. Even compiz works fine (some known video flickering issues are still present). Issues: (a) One thing that (according to [3], section VI.6) is missing from xrandr is the support for 2 independent "Screens", one for each display. (b) The real problem is some display distortion within and around the mouse pointer only while moving it along specific virtual "columns" (or name them vertical stripes!?) in both displays. It gives the impression that it is a systematical error that appears in equally distanced (?) vertical stripes. (c) In addition, the external display when rotated is too slow for just 2D rendering (like scrolling a webpage or the text in a word processing software). I have set the Virtual in xorg.conf size to match the sum of the required maximum resolution(s) supported by the two monitors (width: 1680 x height: 800+1050). I read in ati X1250's specifications [4] (under the section 2D Acceleration Features): Supports a maximum resolution of 2048x1536 @ 32bpp (driver-limited). Questions: For (a): Any information if this planend to be fixed soon? For (b): Can this be explained/fixed? Sort of a question for (c): I suppose this really means that the X1250 graphic card cannot achiece 2D acceleration over "1536" height-pixels (?) :-( My current xorg.conf is attached. The command "xrandr -q" reports: Screen 0: minimum 320 x 200, current 1680 x 1850, maximum 1680 x 1850 LCD connected 1280x800+0+1050 (normal left inverted right x axis y axis) 400mm x 300mm 1280x800 60.0*+ 1280x768 60.0 1024x768 60.0 800x600 60.0 640x480 60.0 640x400 60.0 512x384 60.0 400x300 60.0 320x240 60.0 320x200 60.0 CRT1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 434mm x 271mm 1680x1050 60.0*+ 1400x1050 60.0 1280x1024 75.0 70.0 60.0 43.0 1440x900 59.9 1280x960 60.0 1280x800 60.0 1152x864 85.0 75.0 70.0 60.0 43.0 1280x768 59.9 1024x768 85.0 75.0 72.0 70.1 60.0 43.5 800x600 85.1 72.2 75.0 70.0 60.3 56.2 640x480 85.0 75.0 72.8 60.0 640x400 75.1 59.9 512x384 60.0 74.9 400x300 75.0 60.7 320x240 75.6 60.0 320x200 75.5 60.1 Sources: [1] http://www.thinkwiki.org/wiki/Xorg_RandR_1.2 [2] http://www.intellinuxgraphics.org/dualhead.html [3] http://wiki.debian.org/XStrikeForce/HowToRandR12 [4] http://ati.amd.com/products/Radeonxpress1250mob/specs.html ** Affects: ubuntu Importance: Undecided Status: New -- Display distortion and other issues when using 2 monitors with ati X1250, ati proprietary driver 8.9, xrandr 1.2 https://bugs.launchpad.net/bugs/273071 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
