Re: X and intelfb fight over videomode

From: Antonino A. Daplas
Date: Fri Nov 18 2005 - 15:33:50 EST

David Härdeman wrote:
> On Fri, Nov 18, 2005 at 09:08:26AM +0800, Antonino A. Daplas wrote:
>> David Härdeman 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.


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


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
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