Ubuntu
xserver-xorg-video-ati package

  1. Bug #27466
  2. Comment #13

Comment 13 for bug 27466

Revision history for this message
Guy Gur-Ari (guygurari) wrote :

This happens to me as well. I'm running Edgy on a thinkpad laptop with a Radeon 9600-based card. Using the 'radeon' driver, external VGA works fine, but DVI doesn't work. When using fglrx, everything works fine.

Another thing that may be related:
    cat /proc/acpi/ibm/video
shows "dvi: disabled" when using radeon, and "dvi: enabled" when using fglrx. This cannot be changed (in either case) by doing:
    echo dvi_enable/disable > /proc/acpi/ibm/video