linux-kernel - Re: [REGRESSION] [2.6.36-rc1] [DRM INTEL] [drm:intel_calculate_wm] *ERROR* Insufficient FIFO for plane, expect flickering: entries required = 36, available = 28.

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Message-ID: <20100819075509.GA4926@tiehlicka.suse.cz>
Date:	Thu, 19 Aug 2010 09:55:09 +0200
From:	Michal Hocko <mhocko@...e.cz>
To:	Chris Wilson <chris@...is-wilson.co.uk>
Cc:	maciej.rutecki@...il.com, "Rafael J. Wysocki" <rjw@...k.pl>,
	linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, airlied@...ux.ie
Subject: Re: [REGRESSION] [2.6.36-rc1] [DRM INTEL] [drm:intel_calculate_wm]
 *ERROR* Insufficient FIFO for plane, expect flickering: entries required =
 36, available = 28.

Hi,

On Wed 18-08-10 20:13:12, Chris Wilson wrote:
> On Wed, 18 Aug 2010 20:46:37 +0200, Maciej Rutecki <maciej.rutecki@...il.com> wrote:
> > Last known good: 2.6.35
> > Failing kernel: 2.6.36-rc1
> > 
> > During boot kernel display this message:
> > [    0.831906] [drm:intel_calculate_wm] *ERROR* Insufficient FIFO for plane, 
> > expect flickering: entries required = 36, available = 28.

I am seeing the same "problem" on my Fujitsu Lifebook[*] if it helps somehow

$ dmesg | grep "Insufficient FIFO for plane" | sed 's/.*\*ERROR\* //' | sort | uniq -c
     49 Insufficient FIFO for plane, expect flickering: entries required = 36, available = 28.
     33 Insufficient FIFO for plane, expect flickering: entries required = 36, available = 31.

[...]

[*] lspci and config attached

Thanks
-- 
Michal Hocko
L3 team 
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic

View attachment "lspci" of type "text/plain" (12753 bytes)

View attachment "config-2.6.36-rc1" of type "text/plain" (67530 bytes)