Comment 48 for bug 198849

With my G35 Asus P5E-VM running Ubuntu 8.04 pre-rel x86-64 with Intel driver 2.2.1, I am seeing two symptoms, using the HDMI port w/ HDMI->DVI adapter:

 - dual-link DVI cable to projector
  -> unable to lock, so blank screen

 - single-link DVI cable to Belinea 1600x1200 LCD
  -> consistent off-by-2 Y size

It seems entirely conceivable that my projector doesn't accept resolutions that aren't expected and untested via the DVI-D connection; I can readily see this happening on HDMI/DVI TVs which support only particular resolutions and possibly on particular digital monitors.

Observations which make me tie the bug to the Intel driver:
 - during BIOS init and before Linux takes over, we see:
  - 640x480

 - during Ubuntu's booting and VESA framebuffer use:
  - 640x480

 - in X, testing various resolutions, the monitor reports:
  - 1600x1198
  - 1280x1022
  - 1280x958
  - 1152x862
  - 1024x766
  - 800x598
  - 640x478

All output in /var/log/Xorg.0.log, xrandr etc, points the correct resolution being used, so it seems like a chip configuration/register setup issue.

Let me know of useful information I can get and contribute!