fbcon or sisfb problem?

fbcon or sisfb problem?

[Thomas Winischhofer]

I see the following problems here with fbcon in 2.6.6 + my development 
version of sisfb (just committed to Andrew and Marcelo since it fixes 
important 64bit issues not relevant here):

1) Upon start (be it in kernel, be it upon modprobe), I see a big white 
rectangle. It seems that this rectangle's size matches exactly the size 
of the previous console area. I have seen reports of similar problems 
since late 2003. Any progress on this? (I have digged around in the 
fbcon code but got lost at some time.)

2) When switching from X back to the console, I only get a blank screen 
and a blinking cursor. Switching to another text console and back makes 
all text of the initial console reappear. Known issue?

3) On a pure 64bit AMD system, starting any text editor (nano, jed, etc) 
does not clear the screen. Characters that were visible on the screen 
prior to starting the editor (eg other programs' output, etc) still show 
up in the editor (of course, they are "ghost" characters and can't be 
edited). Switching to another console and back solves this, too. Known 
issue? (Sidenote: This does not happen on my ia32 systems).

None of these problems seem sisfb's fault. They all happen if sisfb's 2D 
acceleration is disabled as well. Opinions? Comments?

Thomas

PS: Please cc: me

-- 
Thomas Winischhofer
Vienna/Austria
thomas AT winischhofer DOT net          http://www.winischhofer.net/
twini AT xfree86 DOT org


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Re: fbcon or sisfb problem?

[John Zielinski]

Thomas Winischhofer wrote:

> 1) Upon start (be it in kernel, be it upon modprobe), I see a big 
> white rectangle. It seems that this rectangle's size matches exactly 
> the size of the previous console area. I have seen reports of similar 
> problems since late 2003. Any progress on this? (I have digged around 
> in the fbcon code but got lost at some time.)
>
I get something similar when using the radeonfb driver except that I get 
mulit-colored garbage on the screen instead of solid white.  The 
difference is probably due to the different ways that radeonfb and sisfb 
remap the VGA memory layout.  I posted a fix in a post titled "Console 
takeover screen corruption issue" a while back on this list.

Could you see if that patch fixes your problem?  If enough people test 
it we could probably get it included into the kernel.

John




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Re: fbcon or sisfb problem?

[Thomas Winischhofer]

John Zielinski wrote:
> Thomas Winischhofer wrote:
> 
>> 1) Upon start (be it in kernel, be it upon modprobe), I see a big 
>> white rectangle. It seems that this rectangle's size matches exactly 
>> the size of the previous console area. I have seen reports of similar 
>> problems since late 2003. Any progress on this? (I have digged around 
>> in the fbcon code but got lost at some time.)
>>
> I get something similar when using the radeonfb driver except that I get 
> mulit-colored garbage on the screen instead of solid white.  The 
> difference is probably due to the different ways that radeonfb and sisfb 
> remap the VGA memory layout.  I posted a fix in a post titled "Console 
> takeover screen corruption issue" a while back on this list.
> 
> Could you see if that patch fixes your problem?  If enough people test 
> it we could probably get it included into the kernel.
> 
> John
> 
> 

Will do.

BTW: I saw a post on google groups where a user of a Maxtrox described 
the exactly same phenomenon, ie white rectangle.

Thomas


-- 
Thomas Winischhofer
Vienna/Austria
thomas AT winischhofer DOT net	       *** http://www.winischhofer.net
twini AT xfree86 DOT org


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Re: fbcon or sisfb problem?

[John Zielinski]

Thomas Winischhofer wrote:

> BTW: I saw a post on google groups where a user of a Maxtrox described 
> the exactly same phenomenon, ie white rectangle.


I've got a spare Matorx here, I could test that one too then.

John




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