Yet more display troubles with 2.6.15-rc5-mm2

In addition to the problem I reported earlier about 2.6.15-rc5-mm2
hanging at boot with vga=791 I've just discovered another problem.

If I boot with vga=normal (which is aparently all that works), then I
can boot up to a nice lain text login and run startx, but if I then
switch away from X back to a text console with ctrl+alt+f6 or if I
shut down X, then I'm presented with a completely garbled text mode
screen - flashing coloured blocks all over, random bits of text at
random locations etc.

Also, when starting X, just before the cursor appears I normally just
have a black screen. With this kernel I first get a short blink of a
garbled graphics mode screeen with either what looks like just random
pixels or sometimes with something that looks like a mangled snapshot
of my text mode console, or if I kill X with ctrl+alt+backspace and
then start it again (the garbled text mode console does work, although
I'm glad I know how to touch type ;) then I sometimes get what looks
like a snapshot of my previous X session with random pixels on top.
The garbled graphical screen stays for just a blink of an eye, then
it's replaced with the normal black screen and the mouse cursor.

2.6.15-rc5-git1 works perfectly without these issues.

--
Jesper Juhl <jesper.juhl@xxxxxxxxx>
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Relevant Pages

  • Re: Yet more display troubles with 2.6.15-rc5-mm2
    ... >> If I boot with vga=normal, ... >> garbled graphics mode screeen with either what looks like just random ... >> then start it again (the garbled text mode console does work, ...
    (Linux-Kernel)
  • Re: Yet more display troubles with 2.6.15-rc5-mm2
    ... > If I boot with vga=normal, ... > garbled graphics mode screeen with either what looks like just random ... > pixels or sometimes with something that looks like a mangled snapshot ... > then start it again (the garbled text mode console does work, ...
    (Linux-Kernel)
  • Re: Yet more display troubles with 2.6.15-rc5-mm2
    ... >>> garbled graphics mode screeen with either what looks like just random ... >>> then start it again (the garbled text mode console does work, ... >> Can you try another X driver, ie, vesa? ... these 2 patches are present in mm but not in Linus' tree. ...
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    ... you can get information about a kernel panic on your text mode console, eg, Ctrl-Alt-F1. ... Maybe come up in runlevel 3 and see if it still misbehaves, in case it is something to do with your video card / bios / driver. ... Neat way to do this is press 'a' at the grub prompt, and append the number 3 to the kernel commandline for that one boot ...
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