Re: 2.6.0-test1 + matroxfb = unuusable VC

From: Petr Vandrovec (
Date: Mon Jul 21 2003 - 13:10:22 EST

On 21 Jul 03 at 17:45, nick black wrote:

> i'm seeing the exact same issues. i use to see similar problems in late
> 2.4's with agp turned on, where turning off agp sorted out the issue.
> using 2.6 (test1-ac2), it happens whether agp is turned on or not.

I do not think that it has anything to do with AGP, as matroxfb does not
initiate any AGP transfers.
> some info: (cmdline, dmesg, config, lspci -v -v for bridge/card):
> video=matroxfb:vesa:0x1bb

I think that you are using fbset somewhere in your initscripts. Either
do not do that, or apply

> PCI: No IRQ known for interrupt pin A of device 01:00.0. Please try
> using pci=biosirq.

And reconfigure your system to assign IRQ to the AGP devices too.
matroxfb uses it for delivering some notifications to the userspace

> Interrupt: pin A routed to IRQ 0

... if it hooked IRQ0 as MGA interrupt, anything can happen.
                                                Best regards,
                                                    Petr Vandrovec

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