ubuntu-x-swat team mailing list archive

[linas <linasvepstas@xxxxxxxxx>]

Public bug reported:

No video output (all black screen) on matrox g550.  Evidence below, but
here's a wild guess: this card has a dual-dvii output, and I'm guessing
that the mga driver is configured to send the video signal to a non-
existent vga port (i.e. older models of g550 had 1 vga, 1 dvi, but this
one has 2 dvi). But that's just a wild guess. Anyway ...   some details:

-- brand new card, purchased a week ago. Box says model G55-MDDE32F pci-express x1 32MB DDR dual output standard height half-width
-- lspci identifies it as Matrox Graphics, Inc. MGA G550 AGP (rev 01)   Note that this means its slightly mis-identified: its NOT AGP, its a PCI-E 1x card!
-- It does output vga resolution during boot; displays standard text 24 rows x 80 columns just fine (and displays BIOS menus just fine, etc).
-- monitor and cable work fine when attached to different graphics card, even when driven at high-res (1920x1080).
-- tested both connectors; not output on either.
-- The xorg.0.log file shows no errors; it does detect monitor just fine, and autoconfigure just fine.  
-- Forcing xorg.conf to use a lower resolution does not solve problem
-- X-server appears to be running fine, based on sound feedback. I was able to (blindly) log in, start web browser, go to youtube, and start a video playing. The sound-track came out the audio; screen was black.  In other words, X11 itself seems to be running just fine, but the output is completely blanked.
-- Above reports were for Ubuntu karmic; tried upgrading to Oneiric, no improvement.

Will attach xorg.conf and xorg.0.log shortly

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

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https://bugs.launchpad.net/bugs/900111

Title:
  X server on Matrox g550 is all black (no output)

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