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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/900111 Title: X server on Matrox g550 is all black (no output) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-mga/+bug/900111/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs