[Bug 416132] Re: [i855] black screen with intel 855GM/Xorg/HDMI

[Bryce Harrington]

** Description changed:

  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 at 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
+ 
+ [lspci]
+ 00:00.0 Host bridge [0600]: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller [8086:3580] (rev 02)
+     	Subsystem: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller [8086:3580]
+ 00:02.0 VGA compatible controller [0300]: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582] (rev 02)
+     	Subsystem: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582]

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[i855] black screen with intel 855GM/Xorg/HDMI 
https://bugs.launchpad.net/bugs/416132
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