Re: Detect switching to X?

[Knut Petersen <Knut_Petersen@t-online.de>]

Hi Tony

>>
>>Is there any way for a framebuffer driver to detect that a switch
>>to X is in progress?
>>    
>>
>
>None, although fbcon will detect switches from KD_TEXT<->KD_GRAPHICS. I'm
>thinking of adding optional fb_save_state() and fb_restore_state() hooks
>which fbcon will call before going to KD_TEXT and before going to
>KD_GRAPHICS respectively.
>
>I have the code in my development tree since one of the drivers does
>not work with the experimental DRI driver. The DRI driver does not fully
>restore its hardware state so the fbdev driver has to do the restore
>for it.
>
>  
>
Please do submit that code as a patch to the main kernel tree as soon as 
possible.

I cannot take advantage of the full memory reserved for the 
cyberblade/i1 because
the trident X driver only knows about the vga style way of setting the 
screen start
address. The other way involves the usage of the register at GEBase + 
0x10, but
that disables the vga style setting completely.

There is one alternative way: I could hook somewhere into a periodically 
called
interrupt, put some insane value into the vga style regs and check for a 
change.
Then I would assume that X has switched to KD_GRAPHICS and enable the
vga style again.

cu,
 knut


-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems?  Stop!  Download the new AJAX search engine that makes
searching your log files as easy as surfing the  web.  DOWNLOAD SPLUNK!
http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click