On Mon, 2009-02-09 at 23:30 +0000, Bruce M. Simpson wrote: > Robert Noland wrote: > > ... > > Ok, that is odd... Once drm is loaded and X opens it, the ddx driver > > should request that the irq handler be installed. At that point, dmesg > > should show something resembling the following. > > > > vgapci0: child drm0 requested pci_enable_busmaster > > info: [drm] AGP at 0xc0000000 256MB > > info: [drm] Initialized i915 1.6.0 20080730 > > drm0: [ITHREAD] > > > > Yes, I normally see output similar to this when X is started. > > > ... > > > > Does the issue still occur if drm is disabled? > > > > Just tried disabling DRM w/ 'Options "DRI" "off"' in Section "Device". > DRM is indeed disabled -- no dmesg output and not loaded by X. > > However the problem is still there. > > BTW: This Radeon card does have MSI capabilities according to lspci, > however they do not appear to be enabled either by FreeBSD or by X. I > was about to point the finger at interrupt filters, however that blows > that theory out of the water. > > FWIW the IBM T43 here has an i915GM, and USB is working just fine and > dandy. The main data point which sticks out is the fact that the > affected machine is amd64. > > Now that DRM has been disabled on my box, this would point the finger at > the X userland. > > I don't see any obvious nasties in my Section "Device", although I do > pass a BusID and BusType to prevent X from trying to use the second head > with RandR (lots of pain with fubar DVI cables when I first purchased > the monitor). > > I skimmed pci_user.c, thinking libpciaccess just thunks to it via > /dev/pci, it appears there's no instrumentation there I can turn on to > see what userland is actually frobbing.
Ok, lets try another test... There is a scanpci util in the libpciaccess port. We don't install it, but it does get built. Build the port and run scanpci -v as root from the console. That should poke all the pci devices on the box and tell you about them. See if that is able to trigger the issue. robert. > thanks, > BMS > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org" -- Robert Noland <rnol...@freebsd.org> FreeBSD
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