[Linux-fbdev-users] offb problems

[Meelis R. <mr...@li...>]

Short summary: offb works with one graphics card but not with another.

I have a PowerMac 7300. It has abuiltin Control framebuffer device and
a PCI s3virge device (Formac GA6).

Using controlfb on /chaos/control is fine, so let's forget it for now
(the control device has one bad bit when writing to its memory).

Using offb on /chaos/control is OK too.
Using offb on s3virge (/bandit/formacga6) is not OK - it produces
strange filesystem locking oopses on disk load (posted on LKML
recently).

This was tested when using the config option 'Support for early boot
text console (BootX or OpenFirmware only)'. When this option was turned
off, no picture was shown on the screen (MacOS desktop image stayed) but
the keyboard worked and probably the dummy console was used. OFfb was
not activated (seen from dmesg and /proc/fb) and the machine was stable
under load.

So it seems that OFfb works with Control but not with s3virge.

I want to use the s3virge device because of the bad bit in Control. Any
ideas where to start debugging the instability?

-- 
Meelis Roos (mr...@li...)