Re: atyfb - system hangs at bootup prior to enabling framebuffer console -- linux 2.6.18

On Tue, Feb 20, 2007 at 02:43:53AM -0500, cga2000 wrote:
> 
> Regarding atyfb, I did have the time to notice two rather disturbing
> things, though.
> 
> First of all since I was wasting a lot of time rebooting into my sarge
> system or my fully-fledged, non-streamlined custom 2.6 kernel to bypass
> the hang that the patch will address (*) ..  I eventually figured I
> should try to change the video=atyfb:1400x1050 to a vga= specification
> on the fly by editing the grub "kernel" statement and much to my suprise
> and though I got both the atyfb and then the vesafb messages on the
> console it appears that atyfb "won" so to speak:  although I had
> specified vga=791 I was clearly switched to the 1400x1050 mode (rather
> than 1024x768).

I always disable vesafb from my kernels. I don't trust it to play nice 
with hw specific fbdev drivers. I think if you want to force vesafb you 
need pass video=vesafb to the kernel.

> Then, since the "debian way" of installing new kernels automatically
> updates your /boot/grub/menu.lst .. you have to remember to go and edit
> it and add the "video=atyfb:1400x1050" manually every time you install a
> new kernel.  Now the weird thing is that at one point I accidentally
> added the "atyfb" bit to the "title" statement instead of the "kernel"
> statement.  And yet atyfb guessed my "intentions" and automagically
> switched me to 1400x1050. 
> 
> So basically in both cases I was either telling the kernel/atyfb two
> different things or not telling it anything at all and yet it appears to
> have detected the native resolution of my display and enabled the
> 1400x1050 mode automatically.
> 
> Am I correct in assuming the above .. I mean .. is this how it works ..
> Is this new with the current kernels & new versions of atyfb?

Yes, atyfb will automatically use the panel's native resolution.

-- 
Ville Syrjälä
[email protected]
http://www.sci.fi/~syrjala/

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