[Bug 28402] random radeon/kms/drm related freezes with kernel 2.6.34

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https://bugs.freedesktop.org/show_bug.cgi?id=28402

--- Comment #81 from Martin Steigerwald <Martin@xxxxxxxxxxxx> 2010-10-17 06:15:00 PDT ---
(In reply to comment #79)
> Created an attachment (id=39455)
 View: https://bugs.freedesktop.org/attachment.cgi?id=39455
 Review: https://bugs.freedesktop.org/review?bug=28402&attachment=39455

> Make sure gtt and vram are not directly adjacent
> 
> Does this patch fix the issue?

Testing your patch in:
martin@shambhala:~> cat /proc/version
Linux version 2.6.36-rc8-tp42-gtt-vram-not-adjacent-00020-g2d01971-dirty
(martin@shambhala) (gcc version 4.4.5 (Debian 4.4.5-2) ) #1 PREEMPT Sun Oct 17
13:48:48 CEST 2010

I get vram aligned to zero as well - I also have a ThinkPad T42 like Da Fox -
so everything should work:

martin@shambhala:~/Computer/Shambhala/Kernel/2.6.36> dmesg | grep -i radeon
[drm] radeon kernel modesetting enabled.
radeon 0000:01:00.0: power state changed by ACPI to D0
radeon 0000:01:00.0: power state changed by ACPI to D0
radeon 0000:01:00.0: PCI INT A -> Link[LNKA] -> GSI 11 (level, low) -> IRQ 11
radeon 0000:01:00.0: putting AGP V2 device into 4x mode
radeon 0000:01:00.0: GTT: 256M 0xD0000000 - 0xDFFFFFFF
radeon 0000:01:00.0: VRAM: 64M 0x00000000 - 0x03FFFFFF (64M used)
[drm] radeon: irq initialized.
[drm] radeon: 64M of VRAM memory ready
[drm] radeon: 256M of GTT memory ready.
[drm] radeon: 1 quad pipes, 1 Z pipes initialized.
[drm] radeon: ring at 0x00000000D0000000
[drm] radeon: ib pool ready.
[drm] Radeon Display Connectors
[drm] radeon: power management initialized
fb0: radeondrmfb frame buffer device
[drm] Initialized radeon 2.6.0 20080528 for 0000:01:00.0 on minor 0

I will report back after longer term testing.

I am not using radeon.agpmode=-1 but

martin@shambhala:~> cat /etc/modprobe.d/radeon-kms.conf 
options radeon modeset=1 agpmode=4

cause it ran stable for me for

martin@shambhala:~> uprecords -m 20 | grep "2\.6\.35"
    16    12 days, 15:20:19 | Linux 2.6.35.5-tp42-vmem  Mon Oct  4 23:44:41
2010

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