[Bug 44800] New: Radeon HD 6450 CAICOS screen corruption and kernel crashes

[Bug 44800] New: Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

             Bug #: 44800
           Summary: Radeon HD 6450 CAICOS screen corruption and kernel
                    crashes
    Classification: Unclassified
           Product: DRI
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: marko.kohtala@gmail.com


Created attachment 55597
  --> https://bugs.freedesktop.org/attachment.cgi?id=55597
Artefacts in X

I got Radeon HD 6450 1GB DDR3 last fall and have been unable to use it.

I currently run fairly recent 32-bit Debian versions on top of 64-bit vanilla
kernel 3.2.1 (currently with minor patch to makefile and a debug output patch
https://bugs.freedesktop.org/attachment.cgi?id=53428). I've tried with 32-bit
kernel and some older kernels without noticing any difference.

I've tried installing Windows and ran some OpenCL tests. All worked fine so I'd
expect the hardware is working correctly.

I tried if kernel options iomem=off mem=2G would help. They did not help.
mem=2G was needed because jmicron driver for ATA failed without iomem.

I attach some more files I collected while trying if it has gotten fixed.
Now I'm back to running a loaned nVidia card to be able to report this.

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #5 from Marko Kohtala <marko.kohtala@gmail.com> 2012-01-15 06:00:41 UTC ---
Created attachment 55601
  --> https://bugs.freedesktop.org/attachment.cgi?id=55601
dmesg output to text console

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #1 from Marko Kohtala <marko.kohtala@gmail.com> 2012-01-15 05:55:53 PST ---
Created attachment 55598
  --> https://bugs.freedesktop.org/attachment.cgi?id=55598
Artefacts in text console

The artefacts seem to come during scrolling. If scrolling a lot, like in a long
directory listing, they flash there and sometimes some of them stay on screen
after it stops. They are horizontal lines, not blocks like in X.

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #2 from Alex Deucher <agd5f@yahoo.com> 2012-01-15 05:56:22 PST ---
Please attach your xorg log and dmesg output.

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #3 from Marko Kohtala <marko.kohtala@gmail.com> 2012-01-15 05:57:38 PST ---
Created attachment 55599
  --> https://bugs.freedesktop.org/attachment.cgi?id=55599
A kernel panic

To test the card, I usually booted with "text" on kernel command line to
prevent gdm from starting. This time I forgot that and gdm started. I switched
to text console immediately and tried to continue in text mode, but got this
panic while reading dmesg output.

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #4 from Marko Kohtala <marko.kohtala@gmail.com> 2012-01-15 05:58:36 PST ---
Created attachment 55600
  --> https://bugs.freedesktop.org/attachment.cgi?id=55600
lspci -vvnn

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #6 from Marko Kohtala <marko.kohtala@gmail.com> 2012-01-15 06:13:16 PST ---
Created attachment 55604
  --> https://bugs.freedesktop.org/attachment.cgi?id=55604
X server log, before panic if I remember right

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

Marko Kohtala <marko.kohtala@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #55600|application/octet-stream    |text/plain
          mime type|                            |

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #7 from Michel Dänzer <michel@daenzer.net> 2012-01-16 03:23:43 PST ---
The panic backtrace doesn't look obviously related to the radeon driver — all
the symptoms sound like something might be scribbling more or less randomly
over memory.

I wonder if the line

 mtrr: type mismatch for e0000000,10000000 old: write-back new: write-combining

in dmesg might be relevant. Can you try resolving that, e.g. using
https://linuxindetails.wordpress.com/2010/06/27/mtrr-type-mismatch-for-e000000010000000-old-write-back-new-write-combining/
and see if that helps? Might be interesting seeing the contents of /proc/mtrr
before and afterwards (if it changes).

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #8 from Marko Kohtala <marko.kohtala@gmail.com> 2012-01-16 11:26:00 PST ---
Created attachment 55650
  --> https://bugs.freedesktop.org/attachment.cgi?id=55650
dmesg with enable_mtrr_cleanup

Attached the dmesg with The /proc/mtrr is 

reg00: base=0x000000000 (    0MB), size= 8192MB, count=1: write-back
reg01: base=0x200000000 ( 8192MB), size=  512MB, count=1: write-back
reg02: base=0x0e0000000 ( 3584MB), size=  512MB, count=1: uncachable
reg03: base=0x21f800000 ( 8696MB), size=    8MB, count=1: uncachable

and with enable_mtrr_cleanup mtrr_spare_reg_nr=1 options

reg00: base=0x000000000 (    0MB), size= 2048MB, count=1: write-back
reg01: base=0x080000000 ( 2048MB), size= 1024MB, count=1: write-back
reg02: base=0x0c0000000 ( 3072MB), size=  512MB, count=1: write-back
reg03: base=0x100000000 ( 4096MB), size= 4096MB, count=1: write-back
reg04: base=0x200000000 ( 8192MB), size=  512MB, count=1: write-back
reg05: base=0x21f800000 ( 8696MB), size=    8MB, count=1: uncachable
reg06: base=0x0e0000000 ( 3584MB), size=  256MB, count=1: write-combining

It makes no difference.

I installed 32-bit debian 3.1.0 kernel and compiled fglrx for it and am now
reporting this with it. It does not have the artefacts, but is not quite
perfect either (gnome-shell 3.2.1 animations flicker like scaling of windows
does not work as expected, but no artifacts, possibly of no interest to you).

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #9 from Marko Kohtala <marko.kohtala@gmail.com> 2012-01-16 11:43:20 PST ---
Created attachment 55651
  --> https://bugs.freedesktop.org/attachment.cgi?id=55651
Artefacts in X, screencapture

This capture was with the enable_mtrr_cleanup mtrr_spare_reg_nr=1 to kernel.
Here I started the X server from command line and only an xterm and a window
manager. 

The artefacts appear to the window while I scroll the window pressing enter.

There was some constantly running horizontal artefacts, but they were
flickering and got erased immediately thus leaving no mark. Seems like it could
be ramdac reading bad for some scanlines, but more likely it goes on in the
framebuffer. The blue part lower in the window could be one of those caught. I
wonder if the squares in the xterm window are a result of that flickering, but
due to scrolling it does not get erased.

The blue and green spots came one by one slowly while doing something else in
the xterm. They stayed.

This happens only with this CAICOS card (I have an older radeon X300 that has
no problems, as well as a nVidia card goes without these problems). So I'd
expect whatever memory corruption there is, it is somehow in the CAICOS support
in kernel.

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #10 from Alexandre Demers <alexandre.f.demers@gmail.com> 2012-08-10 20:07:23 UTC ---
May or may not be related, but I've seen similar corruption with CAYMAN related
to bug 45018 from time to time. But about comment 3, I was tempted to point at
bug 42373.

Marko, if you are willing to try patches proposed in both mentionned bugs to
see if it helps in any way, that could be interesting.

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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--- Comment #11 from Reartes Guillermo <rtguille@gmail.com> 2012-08-14 13:16:04 UTC ---
@Marko Kohtala

Currently you are bootin in UEFI mode.
Can you boot in BIOS mode to test?

Your board is P8P67-M with BIOS 1701

Is your board "Rev B"?
Also check asus website, since a bios 3602 is there.

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--- Comment #12 from Marko Kohtala <marko.kohtala@gmail.com> 2012-08-14 15:44:40 UTC ---
I have also tried booting in BIOS mode using Ubuntu 12.04 live USB. It does not
help.

The board is "New P67 B3 Revision".

I have since upgraded to BIOS 3602. Same problem is still there.

I've followed kernels now to 3.5. I will try patches mentioned in comment 10
once I get the spare time to upgrade to 3.5.1.

Thank you for your comments.

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

--- Comment #13 from Marko Kohtala <marko.kohtala@gmail.com> 2012-08-19 18:09:19 UTC ---
I applied "drm/radeon: cleanup and fix crtc while programming mc" and
"drm/radeon: fence virtual address and free it once idle [3.5] v2" on top of
3.5.2.

Did not change this. I saw the usual corruption in the fb console as well as in
the xinit running only xterm.

This time I run 64-bit kernel under my 32-bit userspace. I had problems getting
the 32-bit kernel to boot on my EFI.

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https://bugs.freedesktop.org/show_bug.cgi?id=44800

Marko Kohtala <marko.kohtala@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #14 from Marko Kohtala <marko.kohtala@gmail.com> ---
At BIOS 3703, kernel 3.13.2 and Debian xorg-server 2:1.15.1-1, ati_drv.so and
radeon_drv.so at module version 7.3.0. I reinstalled the HD 6450 CAICOS and it
seems the problem no longer occurs.

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[Bug 44800] Radeon HD 6450 CAICOS screen corruption and kernel crashes

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--- Comment #15 from Marko Kohtala <marko.kohtala@gmail.com> ---
I tried with Ubuntu 13.10 live, and the screen corruption appeared. So it was
not a BIOS fix.

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