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Bug#222374: d-i melts screen on sis 630 laptop



On Sun, 21 Dec 2003, Thomas Winischhofer wrote:
[..]
 
> Sisfb should work on this hardware as of 2.4.18, but I am not sure. It's 
> been a while since that came out. 2.4.20 is the oldest one I positively 
> remember to contain a working sisfb.

i can confirm that sisfb works for 2.4.2[0-3]
so there is no kernel bug there, no need to reassign.
 
> But is it really the sis framebuffer driver that is activated during 
> boot, and not eg vga16 or some other generic driver? AFAIK, there is no 
> such thing as "auto-config" for framebuffers; one has to positively 
> choose one by the kernel command line. Even if you compile all of them, 
> none will be activated if no video=xxx is given. So, appending 
> video=sisfb:off won't have any effect if another framebuffer driver is 
> started with another video= switch.

the isolinux.cfg of the d-i iso image contains a "vga=normal" switch
but no video, don't know if "vga=normal" already enables a framebuffer
or if there is another place with some video switch?
 
> Some old Debian installer (which I used about two years ago when I for 
> the last time yet installed Debian on a 630 based laptop) did start 
> vga16 - with the very same result that Maximilian experiences. I don't 
> recall exactly what I did to work around this problem, but I assume it 
> was appending "vga16:off" or something like this.

unfortunately this doesn't work with d-i
please do not close this bug until f6.txt shows the correct switch
to really disable the chosen framebuffer

take a look at this patch below 
(no idea which patchlevel d-i uses and about the controll characters):

regards
max


--- a/isolinux/f5.txt	2003-12-17 15:34:18.000000000 +0100
+++ b/isolinux/f5.txt	2003-12-22 18:49:29.000000000 +0100
@@ -6,7 +6,7 @@
 
 0fHARDWARE                               PARAMETER TO SPECIFY07
 Monochrome monitor                     0fmono07
-Disable framebuffer for monitor        0fvideo=vga16:off07
+Disable framebuffer for monitor        0fdebian-installer/framebuffer=false07
 IBM PS/1 or ValuePoint (IDE disk)      0fhd=0bcylinders0f,0bheads0f,0bsectors07
 IBM ThinkPad                           0ffloppy=thinkpad07
 IBM Pentium Microchannel               0fmca-pentium no-hlt07





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