Messages in this thread | | | From | Frans Pop <> | Subject | Re: [Bug 10843] Display artifacts on XOrg logout with PAT kernel and VESA framebuffer | Date | Mon, 16 Jun 2008 01:02:10 +0200 |
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On Sunday 15 June 2008, Siddha, Suresh B wrote: > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10843 > > Subject : Display artifacts on XOrg logout with PAT kernel > > and VESA framebuffer > > Submitter : Frans Pop <elendil@planet.nl> > > Date : 2008-05-31 14:04 (15 days old) > > References : http://lkml.org/lkml/2008/6/7/206 > > Can you also check, if there is any impact with kernel boot param for > vesafb "mtrr:3"?
Hello Suresh. Thanks for responding.
I've done 4 successive boots with the boot parameters as shown below. Each boot was basically: set correct parameters in grub -> login to KDE -> reboot and check for artifacts.
1) (none) --> clean 2) vga=791 --> artifacts 3) vga=791 nopat --> clean 4) vga=791 video=vesafb:mtrr:3 --> artifacts
So the mtrr option did not help (if I passed it correctly; the double ":" is somewhat non-intuitive). The kernel log also does not show any difference I can see in the last boot, but I don't know if the mtrr option is supposed to show up in any way.
From the kernel log for each boot: 1) x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 Console: colour VGA+ 80x25 console [tty0] enabled
2) x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 Console: colour dummy device 80x25 console [tty0] enabled vesafb: framebuffer at 0x80000000, mapped to 0xffffc20000900000, using 3072k, total 7872k vesafb: mode is 1024x768x16, linelength=2048, pages=4 vesafb: scrolling: redraw vesafb: Truecolor: size=0:5:6:5, shift=0:11:5:0 Console: switching to colour frame buffer device 128x48 fb0: VESA VGA frame buffer device
3) PAT support disabled Console: colour dummy device 80x25 console [tty0] enabled vesafb: framebuffer at 0x80000000, mapped to 0xffffc20000900000, using 3072k, total 7872k vesafb: mode is 1024x768x16, linelength=2048, pages=4 vesafb: scrolling: redraw vesafb: Truecolor: size=0:5:6:5, shift=0:11:5:0 Console: switching to colour frame buffer device 128x48 fb0: VESA VGA frame buffer device
4) x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 Console: colour dummy device 80x25 console [tty0] enabled vesafb: framebuffer at 0x80000000, mapped to 0xffffc20000900000, using 3072k, total 7872k vesafb: mode is 1024x768x16, linelength=2048, pages=4 vesafb: scrolling: redraw vesafb: Truecolor: size=0:5:6:5, shift=0:11:5:0 Console: switching to colour frame buffer device 128x48 fb0: VESA VGA frame buffer device
Hope that helps. If you need any additional information, please ask.
Cheers, FJP
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