I've been running 2.6.12-rc2-mm3 for a long time. Recently I upgraded
a bunch of OS packages (Debian unstable), so I thought I may as well
upgrade the kernel, too. I've got a dual-head setup driven by a Radeon
9200 and a Radeon 7000. When I booted 2.6.17-rc2, X never came up; I
got "RADEON: Cannot read V_BIOS" and "RADEON: VIdeo BIOS not detected
in PCI space!" for the RADEON 7000, and it eventually gets in a loop of
spitting out "RADEON: Idle timed out, resetting engine ... " messages
in Xorg.log. Doing a diff of working and broken logs uncovered that the
Radeon 7000's PCI ROM resource area had moved from ff8c000 to c6900000.
Once I removed the Radeon 7000 screen from the Xorg config, X came up fine
on the one head. Adding stupid amounts of printks to the PCI subsystem in
.17-rc2 uncovered that at some point, the ROM area is discovered to be
at ff8c0000, but is later reallocated to c6900000.
welcome to X have a nice day :-)
X is horribly horribly broken in this area, if you remove the
pci_enable_device from drivers/char/drm/drm_stub.c
and restart everything does it still happen?
The problem is that X uses the fact that the pci bars are disabled to
decide whether to POST the card using the BIOS, however the card isn't
actually posted but pci_enable_device enables the BARs...
however not doing pci_enable_device causes interrupts to not work on the
cards in a lot of circumstances..
Dave.
--
David Airlie, Software Engineer
http://www.skynet.ie/~airlied / airlied at skynet.ie
Linux kernel - DRI, VAX / pam_smb / ILUG
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