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SubjectRe: Hang in fb_notifier_call_chain with nvidia framebuffer
On Wed, 04 Oct 2006 09:26:04 -0700
Wink Saville <> wrote:

> Attached in the zip file is:
> log-hang1.txt -> log showing hang
> cfg-hang1 -> config file for hang condition
> cfg-ok -> config file that works
> fbmem.c -> Modifications to register_framebuffer
> To possibly assist I turned on debugging in nvidia.c and found that it
> hung in the call to register_framebuffer. I then added some additional
> debug in that routine and it appears the hang occurs in the call to
> fb_notifier_call_chain.
> Please let me know what else maybe needed.


- get sysrq working:

set CONFIG_MAGIC_SYSRQ=y, rebuild, reboot
echo 1 > /proc/sys/kernel/sysrq
dmesg -n 8

- make it hang

- Hit alt-sysrq-T

- Send us the resulting output

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