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

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Date:	Mon, 7 Dec 2009 21:26:23 -0800
From:	Steven Noonan <steven@...inklabs.net>
To:	Dave Airlie <airlied@...hat.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jerome Glisse <jglisse@...hat.com>
Subject: Re: [BISECTED] 33 second boot delay (caused by Radeon KMS) on 2.6.32

On Mon, Dec 7, 2009 at 9:05 PM, Dave Airlie <airlied@...hat.com> wrote:
> 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.

Attached the dmesg with drm.debug=15.

> 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).
>

Okay. Reported. https://bugs.freedesktop.org/show_bug.cgi?id=25506

- Steven

View attachment "dmesg.txt" of type "text/plain" (88193 bytes)