Re: mode setting and console locking

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Mon, 2004-05-17 at 01:57, Jon Smirl wrote:
> I have two video cards installed. I run X on the primary and fbdev on the
> secondary.  I'm having a problem setting the mode to the fbdev device from an
> xterm window. This was working six months ago in 2.6 but it is broken currently.
> 
> If I load fbdev on my primary card, then run X on it, fbset will work on the
> primary card fron the xterm window.
> 
> if I load fbdev on my secondary card (it is reset and fbdev loads without
> problem) then fbset from an xterm window will lock my box. fbset from a console
> window works fine. I have tried this both ways, swapping the primary and
> secondary cards, so it doesn't seem to be the card drivers.
> 
> Is there some locking going on in fbdev mode setting that is interacting with X?
> My X server does not have the fbdev driver loaded. The only thing I can think of
> is that the console is marked at being in KD_GRAPHICs. Any ideas?

No, there is currently no locking. There is locking between printk (fbcon)
and mode setting but not with userland clients. 

Ben.




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