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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