Re: 2.6.10 dies when X uses G550

[Dave Airlie <airlied@gmail.com>]

> 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.