Re: atyfb,matrox hardlocks, multihead, USB broken, 2.4.2-ac8

Re: atyfb,matrox hardlocks, multihead, USB broken, 2.4.2-ac8

[Petr Vandrovec]

Sorry, forgot to CC linux kernel...

Elmer Joandi wrote:
> 
> 2.4.2-ac8, with 4 graphics cards, Dual Celeron
> now with 2.4.2-ac8 it is even more clear
> any attempt to insert  module ends with straight lockup
> video mode swithc occurs and then ping to the box stops
> immediately.
> more, starting X locks kernel the same way.

Try 'video=scrollback:0'. Scrollback code does not handle
heads with different width correctly.
						Petr Vandrovec

Re: atyfb,matrox hardlocks, multihead, USB broken, 2.4.2-ac8

[Elmer Joandi]

Got it to work somewhat...
that was real long f***

the only sequence -
no dga,
kernel boots and BIOS uses Matrox PCI as first graphics
via matrox
start up two ATI cards(one AGP, one PCI)(xinerama mode,
screwed output ) with Xserver hacked to read /dev/input/event*
ant talking direct to ATI.

now insert matroxfb_base
now start two normal XFree86 on  framebuffer /dev/fb0 and /dev/fb1,
i.e. matroxes, xinerama keyboard from system console...

log into matroxes
ATI dualscreen picture clears itself by magic spell and becomes usable.

everything works... until ATI exits, then there is kernel hardlock.

Weird that all locks are hardlocks - no ping no sysreq...

SMP here.

ah - message from matrox framebuffer  - complaining no irq A assigned to
slot, and  suggesting that BIOS is buggy.


Will I be more happy when using a dualhead matrox AGP instead of AGP+PCI
ATI pair ?

2.4.0 kernel, 2.4.2-ac8 USB looks like very very broken.

elmer.

Re: atyfb,matrox hardlocks, multihead, USB broken, 2.4.2-ac8

[Petr Vandrovec]

Elmer Joandi wrote:

> ah - message from matrox framebuffer  - complaining no irq A assigned to
> slot, and  suggesting that BIOS is buggy.

Maybe you disabled it in BIOS? My BIOS has option 'assign irq to vga'...
 
> Will I be more happy when using a dualhead matrox AGP instead of AGP+PCI
> ATI pair ?

It depends on how much heads you need. If you want more than one head
and all heads need full acceleration, do not go to G400/G450. There
is only one accelerator on them... (well, if you are using all displays
together as one big workplace, you can try it; in that case it has
benefit that both heads share same memory, so you can save some
intersection operations).
 
> 2.4.0 kernel, 2.4.2-ac8 USB looks like very very broken.

USB worked for me until about 2.4.2-ac12 (VIA chipset).
							Petr

atyfb,matrox hardlocks, multihead, USB broken, 2.4.2-ac8

[Elmer Joandi]

2.4.2-ac8, with 4 graphics cards, Dual Celeron
now with 2.4.2-ac8 it is even more clear 
any attempt to insert  module ends with straight lockup
video mode swithc occurs and then ping to the box stops 
immediately.
more, starting X locks kernel the same way.

meantime I changed from BIOS the AGP to be primary video.
this was probably what made the most of difference as 
AGP is with largest PCI ID.

USB is also nonworking. 2.4.0 was  most part OK.