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SubjectRe: 2.6.10 dies when X uses G550
https://bugs.freedesktop.org/show_bug.cgi?id=2431

might have something to do with this...

Dave.

On Fri, 4 Feb 2005 16:57:50 +1100, Dave Airlie <airlied@gmail.com> wrote:
> > The logs with secondary radeon used to end like this:
> > (II) LoadModule: "int10"
> > (II) Reloading /usr/X11R6/lib/modules/linux/libint10.a
> > (II) RADEON(0): initializing int10
> > (**) RADEON(0): Option "InitPrimary" "on"
> > (II) Truncating PCI BIOS Length to 53248
> >
> > The logs for secondary G550 ends like this, with or without int10
> > (--) MGA(0): Pseudo-DMA transfer window at 0xF3000000
> > (==) MGA(0): BIOS at 0xC0000
> > (WW) MGA(0): Video BIOS info block not detected!
> > (II) MGA(0): MGABios.RamdacType = 0x0
> > (==) MGA(0): Write-combining range (0xf0000000,0x2000000)
> > (--) MGA(0): VideoRAM: 2048 kByte
> > (II) Loading sub module "ddc"
> > (II) LoadModule: "ddc"
> > (II) Reloading /usr/X11R6/lib/modules/libddc.a
> > (II) Loading sub module "i2c"
> > (II) LoadModule: "i2c"
> > (II) Loading /usr/X11R6/lib/modules/libi2c.a
> > (II) Module i2c: vendor="The XFree86 Project"
> > compiled for 4.3.0.1, module version = 1.2.0
> > ABI class: XFree86 Video Driver, version 0.6
> > (==) MGA(0): Write-combining range (0xf0000000,0x200000)
> > (II) MGA(0): vgaHWGetIOBase: hwp->IOBase is 0x03d0, hwp->PIOOffset is 0x0000
> > (II) MGA(0): I2C bus "DDC" initialized.
> > (II) MGA(0): I2C device "DDC:ddc2" registered at address 0xA0.
> > (II) MGA(0): I2C device "DDC:ddc2" removed.
> > (II) MGA(0): I2C Monitor info: (nil)
> > (II) MGA(0): end of I2C Monitor info
> >
> > The video bios is apparently not detected at all, and therefore not run.
> >
> > The kernel doesn't actually hang, only X gets stuck. sysrq+T
> > dumped stack traces for all tasks except the xserver. For X,
> > there was only one line identifying the xserver process and the fact
> > that it was Running. No stack dump. I managed to kill all tasks
> > and have init proceeding into init 2.
> >
> > So I wonder - is Debians X 4.3.0.1 buggy, or the kernel?
> > The fact remains that the newer kernels locks up while trying to use the
> > secondary radeon, while it actually works with 2.6.8.1.
>
> I've had some luck in reproducing this, however I've had to retask my
> test machine to find some hangs in my real life application (can run
> for 5 or 6 days without crashing :-), so I might get back to looking
> for this at some stage but when is anybodys guess, all I did was take
> a Radeon AGP card, and a PCI SiS crappy card and ran X on 2.6.10 and
> it hung....
>
> Dave.
>
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