Re: [Bug 10843] Display artifacts on XOrg logout with PAT kernel and VESA framebuffer

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From: Frans Pop
Date: Sunday, June 15, 2008 - 4:02 pm

On Sunday 15 June 2008, Siddha, Suresh B wrote:

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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Messages in current thread:
2.6.26-rc6-git2: Reported regressions from 2.6.25, Rafael J. Wysocki, (Sat Jun 14, 1:04 pm)
[Bug 10493] mips BCM47XX compile error, Rafael J. Wysocki, (Sat Jun 14, 1:04 pm)
[Bug 10642] general protection fault: 0000 [1] PREEMPT SMP ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10711] BUG: unable to handle kernel paging request - ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10629] 2.6.26-rc1-$sha1: RIP __d_lookup+0x8c/0x160, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10764] some serial configurations are now broken, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10725] Write protect on on, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10741] bug in `tty: BKL pushdown'?, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10730] build issue #503 for v2.6.26-rc2-433-gf26a398 ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10726] x86-64 NODES_SHIFT compile failure., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10724] ACPI: EC: GPE storm detected, disabling EC GPE, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10714] Badness seen on 2.6.26-rc2 with lockdep enabled, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10861] 2.6.26-rc4-git2 - long pause during boot, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10860] total system freeze at boot with 2.6.26-rc, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10830] two different oopses with 2.6.26-rc4, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10843] Display artifacts on XOrg logout with PAT kern ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10827] 2.6.26rc4 GFS2 oops., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10826] NFS oops in 2.6.26rc4, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10821] rt25xx: lock dependency warning, association f ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10819] Fatal DMA error with b43 driver since 2.6.26, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10815] 2.6.26-rc4: RIP find_pid_ns+0x6b/0xa0, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10794] mips: CONF_CM_DEFAULT build error, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10799] sky2 general protection fault, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10786] 2.6.26-rc3 64bit SMP does not boot on J5600, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10903] ssh connections hang with 2.6.26-rc5, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10872] x86_64 boot hang when CONFIG_NUMA=n, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10892] Sometime (often) X come out blank (black scree ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10866] /dev/rtc was missing until I disabled CONFIG_R ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10868] Oops on loading ipaq module since 2.6.26, prev ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10862] forcedeth: lockdep warning on ethtool -s, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10864] [regression][bisected] ~90,000 wakeups as of 2 ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10865] i get the following oops trying to mount an nt ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 9791] Clock is running too fast^Wslow using acpi_pm c ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10912] Regressions in the last kernels, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10908] IPF Montvale machine panic when running a netw ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10906] repeatable slab corruption with LTP msgctl08, Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
[Bug 10905] 2.6.26: x86/kernel/pci_dma.c: gfp |= __GFP_NOR ..., Rafael J. Wysocki, (Sat Jun 14, 1:12 pm)
Re: [Bug 10794] mips: CONF_CM_DEFAULT build error, Adrian Bunk, (Sat Jun 14, 2:24 pm)
Re: [Bug 10493] mips BCM47XX compile error, Adrian Bunk, (Sat Jun 14, 2:26 pm)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, Linus Torvalds, (Sat Jun 14, 2:42 pm)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, Maciej W. Rozycki, (Sat Jun 14, 3:00 pm)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, Vegard Nossum, (Sat Jun 14, 3:09 pm)
Re: [Bug 10714] Badness seen on 2.6.26-rc2 with lockdep en ..., Benjamin Herrenschmidt, (Sat Jun 14, 4:29 pm)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, David Miller, (Sat Jun 14, 4:31 pm)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, Linus Torvalds, (Sat Jun 14, 5:00 pm)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, Linus Torvalds, (Sat Jun 14, 5:41 pm)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, David Miller, (Sat Jun 14, 6:07 pm)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, Linus Torvalds, (Sat Jun 14, 7:15 pm)
Re: [Bug 10861] 2.6.26-rc4-git2 - long pause during boot, Chris Clayton, (Sat Jun 14, 11:12 pm)
Re: [Bug 10864] [regression][bisected] ~90,000 wakeups as ..., Németh Márton, (Sat Jun 14, 11:30 pm)
Re: [Bug 10868] Oops on loading ipaq module since 2.6.26, ..., Adam Williamson, (Sat Jun 14, 11:44 pm)
Re: [Bug 10843] Display artifacts on XOrg logout with PAT ..., Romano Giannetti, (Sun Jun 15, 3:22 am)
Re: [Bug 10843] Display artifacts on XOrg logout with PAT ..., Rafael J. Wysocki, (Sun Jun 15, 3:40 am)
Re: [Bug 10864] [regression][bisected] ~90,000 wakeups as ..., Rafael J. Wysocki, (Sun Jun 15, 3:48 am)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, Rafael J. Wysocki, (Sun Jun 15, 3:51 am)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, Rafael J. Wysocki, (Sun Jun 15, 4:14 am)
Re: [Bug 10843] Display artifacts on XOrg logout with PAT ..., Romano Giannetti, (Sun Jun 15, 4:25 am)
Re: [Bug 10843] Display artifacts on XOrg logout with PAT ..., Romano Giannetti, (Sun Jun 15, 4:26 am)
Re: [Bug 10843] Display artifacts on XOrg logout with PAT ..., Romano Giannetti, (Sun Jun 15, 4:35 am)
Re: [Bug 10872] x86_64 boot hang when CONFIG_NUMA=n, Randy Dunlap, (Sun Jun 15, 9:35 am)
Re: [Bug 10872] x86_64 boot hang when CONFIG_NUMA=n, Yinghai Lu, (Sun Jun 15, 12:18 pm)
RE: [Bug 10843] Display artifacts on XOrg logout with PAT ..., Siddha, Suresh B, (Sun Jun 15, 12:29 pm)
Re: [Bug 10843] Display artifacts on XOrg logout with PAT ..., Frans Pop, (Sun Jun 15, 4:02 pm)
Re: 2.6.26-rc6-git2: Reported regressions from 2.6.25, Maciej W. Rozycki, (Sun Jun 15, 4:31 pm)
Re: [Bug 10872] x86_64 boot hang when CONFIG_NUMA=n, Randy Dunlap, (Sun Jun 15, 6:11 pm)
Re: [Bug 10872] x86_64 boot hang when CONFIG_NUMA=n, Yinghai Lu, (Sun Jun 15, 9:12 pm)
Re: [Bug 10872] x86_64 boot hang when CONFIG_NUMA=n, Yinghai Lu, (Sun Jun 15, 9:15 pm)
Re: [Bug 10872] x86_64 boot hang when CONFIG_NUMA=n, Randy Dunlap, (Sun Jun 15, 10:14 pm)
Re: [Bug 10741] bug in `tty: BKL pushdown'?, Johannes Weiner, (Mon Jun 16, 3:03 am)
Re: [Bug 10741] bug in `tty: BKL pushdown'?, Alan Cox, (Mon Jun 16, 3:33 am)
Re: [Bug 10905] 2.6.26: x86/kernel/pci_dma.c: gfp |= __GFP ..., Miquel van Smoorenburg, (Mon Jun 16, 4:26 am)
Re: [Bug 10741] bug in `tty: BKL pushdown'?, Alan Cox, (Mon Jun 16, 4:46 am)
Re: [Bug 10905] 2.6.26: x86/kernel/pci_dma.c: gfp |= __GFP ..., Rafael J. Wysocki, (Mon Jun 16, 6:19 am)
Re: [Bug 10872] x86_64 boot hang when CONFIG_NUMA=n, Randy Dunlap, (Mon Jun 16, 8:32 am)
Re: [Bug 10741] bug in `tty: BKL pushdown'?, Johannes Weiner, (Mon Jun 16, 8:33 am)
Re: [Bug 10741] bug in `tty: BKL pushdown'?, Alan Cox, (Mon Jun 16, 11:22 am)
Re: [Bug 10741] bug in `tty: BKL pushdown'?, Johannes Weiner, (Thu Jun 19, 4:06 am)
Re: [Bug 10827] 2.6.26rc4 GFS2 oops., Adrian Bunk, (Sun Jun 22, 2:09 am)
Re: [Cluster-devel] Re: [Bug 10827] 2.6.26rc4 GFS2 oops., Rafael J. Wysocki, (Mon Jun 23, 10:02 am)
RE: [Bug 10843] Display artifacts on XOrg logout with PAT ..., Pallipadi, Venkatesh, (Fri Sep 12, 5:43 am)
RE: [Bug 10843] Display artifacts on XOrg logout with PAT ..., Pallipadi, Venkatesh, (Fri Sep 12, 9:05 am)