Re: [BISECTED] 33 second boot delay (caused by Radeon KMS) on 2.6.32

[Dave Airlie <airlied@redhat.com>]

On Mon, 2009-12-07 at 21:01 -0800, Steven Noonan wrote:
> Hi,
> 
> I finally got around to compiling 2.6.32 for my primary machine, and
> with radeon.modeset=1, the machine has a horrifying 33 second boot
> delay (it stays at a black screen for the duration).
> 
> I figured a 'git bisect v2.6.32 v2.6.31 -- drivers/gpu/drm' would
> catch it. Hopefully this bisection helps pin down the underlying
> problem:
>  # bad:  [22763c5c] Linux 2.6.32
>  # good: [74fca6a4] Linux 2.6.31
>  # bad:  [df748b02] drm/ttm: fix refcounting in ttm global code.
>  # good: [a513c184] drm/radeon/kms: Don't try to process irq when we a
>  # good: [aadd4e17] drm/radeon: some r420s have a CP race with the DMA
>  # good: [74bf2ad5] drm/kms: make fb helper work for all drivers.
>  # bad:  [62a8ea3f] drm/radeon/kms: Remove old init path as no hw use
>  # good: [f0ed1f65] drm/radeon/kms: Convert R520 to new init path and
>  # skip: [d4550907] drm/radeon/kms: Convert R100 to new init path (V2)
>  # good: [3bc68535] drm/radeon/kms: Convert RS690/RS740 to new init pa
>  # bad:  [c010f800] drm/radeon/kms: Convert RS600 to new init path
> 
> Any ideas why c010f800 would cause this?
> 

Wierd, it seems an unlikely change to affect this, can you boot with
drm.debug=15 on the command line and see if we can glean anymore info
about where its hanging.

It might be good to open a bug either on kernel.org or freedesktop.org
(against Xorg radeon driver - since we mostly hang out there).

Dave.