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[Goofy <gfiala@xxxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

Ubuntu 9.04
xorg: 1:7.4~5ubuntu18
xserver-xorg-video-intel: 2:2.6.3-0ubuntu9.4
connected monitor is _only_ a Epson TW3800 projector via DVI2HDMI cable (native resolution: 1920x1050)

With this hardware configuration (about since ubuntu 8.1.0) several
problems occur:

-the standard text mode 640x480@90Hz is instable, the projector is not able to show this low resolution stable, screen goes blank and is only visible shortly
-no higher console/graphics mode is automatically choosen
-not even the "safe graphics mode" of the installation cd with "xforcevesa" results in a visible screen
-the problem is related to only 2 modelines get detected for this monitor device (640x480 and 1920x1050)


With an older Xorg (X Window System Version 1.3.0, my current workaround) i was able to get a working xorg.conf. However, with an even older server/driver/VGA many more modelines where detected by the driver for this monitor-device.

WIthout an xorg.conf i also get only a black screen for this setup (need
to force to enable TDMI in favor of VGA for pipe A/B).

further problems with this configuration:

-as soon as the xrandtray tool is started (no action triggered), the screen get empty/background colored and a restart of the XServer is the only way to get the display back
-as soon as any resolution/mode switch by any program is triggered the screen gets either black or background-colored and one needs to restart the XServer to get the image back

The expected behavior is:
-use the highest possible text mode and/or another available resolution that can be safely displayed
-auto detection if only tje TDMI-pipe (HDMI or DVI) is connected and correct setup of xorg(.conf)
-xrandr-tray should not be able to scramble the display permanently for the standard use-cases
-switching of resolutions should work
-detection of all available mode-lines

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New

-- 
black screen with intel 855GM/Xorg/HDMI 
https://bugs.launchpad.net/bugs/416132
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