[mythtv-users] Matrox G400: Blue screen watching TV or recorded programs

Joe Votour joevph at yahoo.com
Fri Oct 8 23:54:20 UTC 2004


You don't say what Linux distribution you're running,
or what version of XFree86/Xorg you're using, but I
suspect that you're facing an Xorg bug.

On some drivers (including the Matrox mga driver),
there is a problem with memory allocation for XVideo
objects, and this would cause the blue screen you're
talking of.  I've seen this as well when trying to use
a Matrox G400 recently, but I got the blue screen on
both my monitor, and my TV set, if I recall correctly.

Do you also see messages like this in the mythfrontend
X Error of failed request:  BadAlloc (insufficient
resources for
  Major opcode of failed request:  141 (XVideo)
  Minor opcode of failed request:  19 ()
  Serial number of failed request:  57
  Current serial number in output stream:  57

If so, that confirms that it's an Xvideo problem.  You
can work around it (but not truly fix it) by adding
the line 'Option "XaaNoOffscreenPixmaps"' in your
Xorg.conf file, under the "Device" section.

I've never been able to get my G400 to work with an
XF86Config, I've always had to use fbset.  Every time
I generate mode lines with fbset -x, I alwasy get
invalid (according to the X server) values.

-- Joe

--- Alan Murrell <lists at murrell.ca> wrote:

> Hi There,
> I am currently running:
>   MythTV v0.16
>   Hauppage PVR-250
>   Matrox G600 (dual head) -> TVOut
> Using the "Matrox Power Desk" software (as well as
> the MGA and HAL drivers
> from the Matrox site), I am able to get the the
> monitor to be "cloned" onto
> the TV.  Everything seems to work fine, except when
> I try to watch TV or
> watch a recording from the TV: all I get is a blue
> screen on the TV, but the
> picture shows up perfectly on the monitor, and sound
> is okay as well.
> I guess I have two questions:
>   1. Is anyone successfully running a G400
> outputting to the TV, and if so,
> would it be possible to post your XF86Config-4 file?
>   2. My real preference would be to run in the
> framebuffer.  I can get the
> frambuffer initially setup, but after that, I get
> stuck.  I have seen
> references to the G200 HOWTO which has helped some
> people get the G400
> working with TV output.  Would it be possible to
> post a link to the HOWTO?
> I could not find it on the MythTV site.
> TIA,
> Alan Murrell
> > _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org

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