On Wed, Oct 05, 2005 at 06:03:24PM +0200, Lubos Vrbka wrote: > hi, > > >What does dmesg say about agp? > actually, nothing... it's weird, because agpgart should be compiled into > the kernel Hmm, that is weird! > >In my AMD64 the AGP comes from: > >Device Drivers ---> > > Character devices ---> > > /dev/agpgart (AGP Support) > > AMD Opteron/Athlon64 on-CPU GART support > > > >If I have > >Processor type and features ---> > > IOMMU support > >selected, then the /dev/agpgart is automatically selected, and I don't > >have the 'AMD Opteron/Athlon64 on-CPU GART support' available. > thanks for information. you're right, with IOMMU support disabled i can > see both /dev/agpgart switch and amd 64bit on-cpu gart support. when > iommu is enabled, both of these switches seem to be activated by default > and they cannot be changed in the x/menuconfig. do you think it is ok? > Yes I think it is ok. Unfortunately I don't have any further info about IOMMU, but the help for IOMMU says that it includes a driver for the AMD Opteron/Athlon64 IOMMU, so I guess that you can have agp driver for AMD on-CPU GART with or without IOMMU. > >Did you mention which chipset you have, maybe I missed it. Anyway I > >don't think that a VIA chipset wouldn't be supported. Even my K8T800Pro > >worked with 2.6.12 and lspci lists it in 2.6.14. > i have via k8t890. i just realized that the kernel recognizes many > features that the last one missed... regarding the agp, it worked fine > with 2.6.11... At least 2.6.14 has something for the K8T890. You can just `grep -i k8t890 /usr/src/linux/drivers/char/agp/amd64-agp.c` to see if it is in the 2.6.12. > >You can always try the 'agp_try_unsupported=1' option (if you use agp as > >a module). If the agp is in the kernel, give that as a kernel parameter. > you mean to give agp_try_unsupported during boot? what should it do? If you have the agp compiled in the kernel, you pass a kernel parameter during a boot. If you use GRUB, edit the /boot/grub/menu.lst. Find the line that says # kopt= and append agp_try_unsupported=1 at the end of that line (do not remove the hash mark in the beginning of the line!). e.g. # kopt=root=/dev/hda1 agp_try_unsupported=1 After editing, run `sudo update-grub`. If you use lilo, edit /etc/lilo.conf append it to the line which says append= e.g. append="root=/dev/hda1 agp_try_unsupported=1" If you compile it as a module, just make a file into the /etc/modprobe.d/ directory and add a line options agpgart-amd64 agp_try_unsupported=1 e.g. `sudo echo "options agpgart-amd64 agp_try_unsupported=1" >/etc/modprobe.d/agp` > >Once again, check what dmesg says about agp. > nothing :( > > >I don't know what might have changed between 2.6.11 and 2.6.12 > >concerning the agp, sorry :( > bad to know :( fortunately the card driver runs ok without the kernel > module... but no hw acceleration here :( and newer version of ati driver > (8.14.13) is not usable - it crashes XFree when i move the mouse :( weird... > > regards, > > -- > Lubos > _@_" Simo -- :r ~/.signature
Attachment:
signature.asc
Description: Digital signature