neomagic blank screen in 16bpp mode
kacperw at online.no
Sat Aug 12 03:17:13 PDT 2006
On 8/2/06, Kacper Wysocki <kacperw at online.no> wrote:
> I have an aging IBM Thinkpad 240 with a Neomagic MagicGraph 128XD
> video card onboard running an updated debian sid with X.org 7.0.0.
> Recently I updated my system and at the same time added a modeline to
> xorg.conf, and now startx gives a blank screen - the machine responds
> Is it possible that I somehow damaged 16bpp mode on my video card with
> an out-of-spec Modeline? (doesn't make much sense, since fbdev works
> in the same mode)
> My xorg.conf and log files can be found at
I realize now that this list isn't a good place for support-related
questions (but there is no other list that is a better match).
However, it may be interesting to hear how I resolved this issue.
I noticed how the fbdev driver's 800x600 default autodetected modeline was
Modeline "800x600" 36.00 800 824 896 1024 600 601 603 625 +hsync +vsync
While the neomagic driver was printing the following default modeline
in the log file:
Modeline "800x600" 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync
So I took the former and stuck it in my xorg.conf, and voila things
were back to normal. What's interesting and strange is that things
used to work without a modeline in xorg.conf, as if out-of-spec
modelines "stick" to mode autodetection across X server restarts...
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