Re: [2.6.11 Permedia-2 Framebuffer] driver broken (?).

On Wed, 25 May 2005, Andrew Morton wrote:

Jim Hague [off-list ref] wrote:

quoted

On 21-Mar-2005 Guennadi Liakhovetski wrote:

quoted

On Mon, 21 Mar 2005, Andrew Morton wrote:

quoted

Guennadi, could you please confirm that

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc1/2.6.
12-rc1-mm1/broken-out/pm2fb-x-and-vt-switching-crash-fix.patch

fixes this one?

As discussed with Jim on linux-fbdev-devel this patch fixes the vt / X 
switching problem. We still don't know why starting with 2.4.11 I have to 
switch CONFIG_FB_PM2_FIFO_DISCONNECT off to restore colours / images.
[...]
I traced this breakage down to the patch to 
pm2fb.c after 2.6.10-rc2. Jim wanted to try to reproduce this problem with 
my fb-geometry / colour settings, but I haven't heard from him since then, 

FIrst off, so we're all clear, the problem with vt/X switching was definitely a
pm2fb bug exposed by chages in fbcon, and is definitely fixed by the above
patch. Please apply.

As to Guennadi's problem with colours and images, I've been trying to
reproduce locally without success, hence silence. My pm2fb-on-Sparc
correspondent hasn't seen this either, and I've had no other reports.

I have one possible clue, which I'll pursue with Guennadi off-list.

Guys, did all these things get fixed up in 2.6.12-rc5?

At least I don't see the fix we discussed with Jim included. I'll 
test-boot tomorrow. Anyway, I seem to be the only one affected, and 
switching CONFIG_FB_PM2_FIFO_DISCONNECT fixes the problem, so, maybe we 
could just mark this option "dangerous".

Will (try to) add tomorrow.

Thanks
Guennadi
---
Guennadi Liakhovetski



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