|
On Friday, March 15, 2013 12:14:28 PM Yinghai Lu wrote: > On Fri, Mar 15, 2013 at 8:14 AM, Jiri Kosina <jkosina@xxxxxxx> wrote: > > Just a datapoint -- I have put a trivial debugging patch in place, and it > > reveals that "nobody cared" for irq 16 happens long after last > > > > I915_WRITE(GMBUS4 + reg_offset, 0); > > > > has been performed in gmbus_wait_hw_status(). On the other hand, if I > > comment out both GMBUS4 register offset writes in gmbus_wait_hw_status(), > > then it of course falls back to GPIO bit-banging, but the "nobody cared" > > for irq 16 is gone. > > > > So it seems like something gets severely confused by the I915_WRITE to > > GMBUS4 + reg_offset. So far this seems to have been reported solely on > > Lenovos as far as I can see (although a completely different types), so it > > might be some platform-specific quirk? > > > > Honestly, I still don't understand how all the GMBUS stuff relates to IRQ > > 16 at all. > > that device is using > i915 0000:00:02.0: irq 44 for MSI/MSI-X > > so can you try to boot with pci=nomsi?
I can try disabling MSI with 3.9.0-0.rc2.git0.4.fc20. -rc3 is not yet available in rawhide.
thanks, Shawn |
_______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
