From: Knut Petersen <Knut_Petersen@t-online.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: airlied@linux.ie, linux-kernel@vger.kernel.org,
ykzhao <yakui.zhao@intel.com>,
Jesse Barnes <jbarnes@virtuousgeek.org>
Subject: Re: Regression DRM/i915/KMS: VGA connector unusable after 2.6.31-rc8-git1, DVI connector ok
Date: Wed, 09 Sep 2009 23:35:38 +0200 [thread overview]
Message-ID: <4AA81FAA.3090601@t-online.de> (raw)
In-Reply-To: <alpine.LFD.2.01.0909090719070.7458@localhost.localdomain>
Linus Torvalds schrieb:
> On Wed, 9 Sep 2009, Knut Petersen wrote:
>
>> As the old X does not work with the new kernel, I cannot decide if the
>> kernel or X is to blame.
>>
>
> Hmm. Doesn't old X work if you disable KMS? Either with "i915.modeset=0"
> or by just compiling it out?
>
>
It does work somehow, but very slow and jerky as long as DRI is
enabled in the kernel.
It´s not a a problem related to KMS. Allocation of tiled buffers fails with
that old X, although it worked with 2.6.22.6, that results in a massive
performance drop (more than 70 percent).
Jerky drawing can only be avoided if DRI is disabled in the kernel.
cu,
Knut
next prev parent reply other threads:[~2009-09-09 21:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-08 22:19 Regression DRM/i915/KMS: VGA connector unusable after 2.6.31-rc8-git1, DVI connector ok Knut Petersen
2009-09-08 22:26 ` Jesse Barnes
2009-09-09 1:05 ` [Intel-gfx] " ykzhao
2009-09-08 22:28 ` Carlos R. Mafra
2009-09-08 23:00 ` Knut Petersen
2009-09-08 23:11 ` Linus Torvalds
2009-09-09 7:09 ` Knut Petersen
2009-09-09 14:28 ` Linus Torvalds
2009-09-09 21:35 ` Knut Petersen [this message]
2009-09-09 16:04 ` Jesse Barnes
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