On Wed, Sep 23, 2009 at 12:20 PM, Che-Wei Chang <mail...@gmail.com> wrote: > I installed Ubuntu 9.04 on IBM T42 with ATI Mobile 9000 chipset. > The T42 is connected to an external monitor, Dell 2007FP, through DVI cable. > The native resolution of 2007FP is 1600x1200. > > I set up dual monitors with build-in System/Preferences/Display. > The display panel detected the 2007FP, and showed that it can work on > 1600x1200 mode. > However, the external monitor turned to power saving > while I changed the display mode. In the mean time, T42 screen works. > > The dual monitors mode works OK when I lower the resolution of 2007FP > to 1280x1024, 1152x864, or 1024x768. Then, I turned off T42 monitor in > the display panel, and turned 2007FP to 1600x1200, still not working. > Therefore, I think this should be due to the video driver, not the > configuration. > > I googled dual monitor set-up, and found there is a bug in kernel > 2.68.28, then I upgraded kernel to 2.68.30. However, not luck here. > Following is information given from xrandr with 1152x864 mode. > > Screen 0: minimum 320 x 200, current 2176 x 864, maximum 2176 x 1632 > VGA-0 disconnected (normal left inverted right x axis y axis) > DVI-0 connected 1152x864+0+0 (normal left inverted right x axis y > axis) 367mm x 275mm > 1600x1200 60.0 + > 1280x1024 75.0 60.0 > 1152x864 75.0* > 1024x768 75.0 60.0 > 800x600 75.0 60.3 > 640x480 75.0 59.9 > 720x400 70.1 > LVDS connected 1024x768+1152+0 (normal left inverted right x axis y > axis) 0mm x 0mm > 1024x768 60.0*+ 60.0 > 800x600 60.3 59.9 > 640x480 59.9 59.4 > S-video disconnected (normal left inverted right x axis y axis) > > Any suggestion?
IIRC, the DVI port on the thinkpad dock is limited to 1280x1024. Alex _______________________________________________ xorg mailing list xorg@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/xorg