linux-kernel - Re: [3.5 regression] DRM: Massive (EDID-probing?) X startup delay on ATI Radeon RV770 (HD4870)

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Message-ID: <873940kucu.fsf@spindle.srvr.nix>
Date:	Mon, 06 Aug 2012 14:44:49 +0100
From:	Nix <nix@...eri.org.uk>
To:	Alex Deucher <alexdeucher@...il.com>
Cc:	linux-kernel@...r.kernel.org, Jerome Glisse <j.glisse@...il.com>,
	alex.deucher@...il.com
Subject: Re: [3.5 regression] DRM: Massive (EDID-probing?) X startup delay on ATI Radeon RV770 (HD4870)

On 6 Aug 2012, Alex Deucher outgrape:

> On Sat, Aug 4, 2012 at 12:13 PM, Nix <nix@...eri.org.uk> wrote:
>> Something appears to be wrong, but I have no idea what. I've not changed
>> anything other than the kernel since my last non-huge-delayed startup
>> earlier this week, and both the monitors still work, including the one
>> suffering a huge startup delay.
>
> Can you bisect the kernel or profile Xorg and see what's causing it?
> There haven't been any i2c changes in the radeon kernel driver in a
> while.  I'm assuming it's only the kernel that you changed?  E.g.,
> just to be sure, does booting a different kernel with the same
> userspace components work correctly?

I believe so (I hadn't upgraded anything for a week or so before the
kernel upgrade). I'll verify this soon, and bisect in the next day or
so if the kernel is the only changed component.

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