Messages in this thread | | | Date | Tue, 13 Dec 2005 08:38:53 +0800 | From | "Antonino A. Daplas" <> | Subject | Re: Yet more display troubles with 2.6.15-rc5-mm2 |
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Jesper Juhl wrote: > On 12/12/05, Antonino A. Daplas <adaplas@gmail.com> wrote: >> Jesper Juhl wrote: >>> 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. >> I cannot reproduce your problem... >> > >> Can you try another X driver, ie, vesa? >> > I'm already using the vesa driver. It seems to be the only Open Source > driver that'll work with this card, so i don't have any other to try. >
Ah, vesa Xorg driver with vgacon. I haven't tried that yet. Let me check if I can reproduce the problem.
>> Also, these 2 patches are present in mm but not in Linus' tree. Can >> you check which of these are the culprit, if any? >> >> http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc2/2.6.15-rc2-mm1/broken-out/vgacon-fix-doublescan-mode.patch >> http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc2/2.6.15-rc2-mm1/broken-out/vgacon-workaround-for-resize-bug-in-some-chipsets.patch >> > > Since this is 2.6.15-rc5-mm2 I grabbed these two instead: > http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc5/2.6.15-rc5-mm2/broken-out/vgacon-fix-doublescan-mode.patch > http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc5/2.6.15-rc5-mm2/broken-out/vgacon-workaround-for-resize-bug-in-some-chipsets.patch > > Reverting both patches didn't fix the problem. Starting X then > switching back to a text mode console still results in a completely > messed up text console. X is fine, I can switch back to it no problem, > but text consoles go bye-bye... > > Would there be any point in trying a kernel with just one of the > patches reverted?
Those 2 patches are independent, so it's possible that their side effects can cancel each other out. So yes, try reversing one patch at a time.
Tony
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