Re: [2.6.11 Permedia-2 Framebuffer] driver broken (?).
From: Guennadi Liakhovetski
Date: Mon Mar 07 2005 - 22:16:40 EST
On Mon, 7 Mar 2005, Jim Hague wrote:
> On 05-Mar-2005 Guennadi Liakhovetski wrote:
> > Worked on 2.6.10-rc2. With 2.6.11 during boot upon switching to fb, text
> > becomes orange, penguins look sick (not sharp). X starts and runs normal
> > (doesn't use fb), switching to vt not possible any more. Disabling
> > fb-console in kernel config fixes VTs. Reverting pm2fb.c fixes the
> > problem.
> I've just tried a stock 2.6.11 fresh from the tarball, and I see some of what
> you are seeing.
> I don't see any problems with text colour or images. Text is white, Tux is 100%
> normal. This on a single processor K6/2-450 with a Creative Graphics Blaster
> Exxtreme, BTW.
> However, I do see the problem switching back to a vt from X. In fact it does
> work, except that the video is blanked. This is a bug in pm2fb.c exposed by
> recent changes to fbcon. Please try this fix (works for me) and let me know if
> it restores normal service for you too.
Thanks for the patch. Yes, it does fix switching between X and VT. As for
colours / graphics, disabling CONFIG_FB_PM2_FIFO_DISCONNECT fixes that
too, but it worked under 2.6.10-rc2 with that option on too. What does it
do and why I cannot use it under 2.6.11 any more? The help text to this
option is not very enlightening...
> --- drivers/video/pm2fb.c.orig 2005-03-07 15:35:28.000000000 +0000
> +++ drivers/video/pm2fb.c 2005-03-07 18:34:13.000000000 +0000
> @@ -747,7 +747,7 @@
> if ((info->var.vmode & FB_VMODE_MASK)==FB_VMODE_DOUBLE)
> video |= PM2F_LINE_DOUBLE;
> - if (info->var.activate==FB_ACTIVATE_NOW)
> + if ((info->var.activate & FB_ACTIVATE_MASK)==FB_ACTIVATE_NOW)
> video |= PM2F_VIDEO_ENABLE;
> par->video = video;
> Returning to your problems with text colour and images, can you try
> with CONFIG_FB_PM2_FIFO_DISCONNECT=n and see if that makes a difference.
> Jim Hague - jim.hague@xxxxxxx Never trust a computer you can't lift.
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