ioctl32 error with ati-drivers on 2.6.11 kernel [solved]

Message

Reformist · Post by **Reformist** » Wed Mar 23, 2005 9:26 am

From research around google, it seems there was a problem introduced into 2.6.10-2 kernels for amd64 that prevent the ati-drivers from loading.

I'm running 2.6.11 and get the following:

FATAL: Error inserting fglrx (/lib/modules/2.6.11/video/fglrx.ko): No such device

dmesg reports:

...
Trying to register duplicated ioctl32 handler c0246400
[fglrx:firegl_init_32compat_ioctls] *ERROR* unable to register ioctl32 0
[fglrx:firegl_init] *ERROR* Couldn't register compat32 ioctls!

I'm fairly confident I have everything configured correctly. The above error occurs with ati-drivers 8.8.25 and and 8.10.19. Anyone know a workaround, or the nature of the break, or when it will be fixed?

Evil Dark Archon · Post by **Evil Dark Archon** » Wed Mar 23, 2005 9:40 am

do you have ia32 emulation enabled in your kernel?

Swatinem · Post by **Swatinem** » Wed Mar 23, 2005 11:29 am

make sure you disable IOMMU support and enable agp gart. then remerge the driver, load the modules and it should work.
check out this howto: http://forums.gentoo.org/viewtopic-t-301437.html

Reformist · Post by **Reformist** » Thu Mar 24, 2005 12:52 am

Thank you Swatinem. The agpgart option in my kernel was marked "--", not letting me enable or disable it. I had read that it was "automatically built in" to later kernels for amd64, which doesn't make much sense, and seems to have been wrong. I didn't have iommu disabled. The connection between iommu and agpgart is not intuitive, and should probably be better documented (in the kernel; it already is, in the howto you provided).

Also remember to modprobe amd64_agp if you have it as a module, or fglrx won't be able to init agp.

Thanks guys.