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Message-ID: <437E3A5D.1090006@gmail.com>
Date: Sat, 19 Nov 2005 04:32:29 +0800
From: "Antonino A. Daplas" <adaplas@gmail.com>
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To: =?ISO-8859-1?Q?David_H=E4rdeman?= <david@2gen.com>
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Sylvain Meyer <sylvain.meyer@worldonline.fr>
Subject: Re: X and intelfb fight over videomode
References: <20051117000144.GA29144@hardeman.nu> <437BD8D9.9030904@gmail.com> <20051117014558.GA30088@hardeman.nu> <437C0BF2.4010400@gmail.com> <20051117234510.GA3854@hardeman.nu> <437D298A.7070203@gmail.com> <20051118183607.GA3866@hardeman.nu>
In-Reply-To: <20051118183607.GA3866@hardeman.nu>
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David H?rdeman wrote:
> On Fri, Nov 18, 2005 at 09:08:26AM +0800, Antonino A. Daplas wrote:
>> David H?rdeman wrote:
>>> First time I switch from X to VC:
>>> intelfb: Changing the video mode is not supported.
>>> intelfb: ring buffer : space: 6024 wanted 65472
>>> intelfb: lockup - turning off hardware acceleration
>>>
>>
>> Well, intelfb is at the mercy of X if it's in 'fixed mode'.
>>
>>> Other suggestions?
>>
>> I'm adding Sylvain, the intelfb maintainer, to the CC list.
>>
>> How about this one?  It also resets the ringbuffer before re-initializing
>> it again.
> 
> That made no change at all unfortunately, the messages are exactly the
> same as before...

That's the limit to what I can do (I don't have the hardware) and let's just
wait for the maintainer to respond.

For now, you can eliminate that message by turning acceleration off.

video=intelfb:accel:0

Another solution is to disable direct rendering, but I don't think you want
that.

Tony

PS: I saw this problem before with i810fb, and this is because the i810 driver
of X and i810fb shared the same ringbuffer.  But the i810 chipset has 2 ringbuffers,
so I just made i810fb use the ringbuffer that is not touched by X/DRI. (I don't
know the status now since I don't have this chipset anymore).  That is one 
solution.
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