My laptop is an Acer 1810T. I see this error message each boot. Kind regards Thomas
Jiri Kosina <jkos...@suse.cz> schrieb: >On Fri, 15 Mar 2013, Jiri Kosina wrote: > >> > I have the same problem on my Lenovo T500. I think the graphics card is >> > involved. >> > >> > This laptop has "hybrid graphics" - one Intel GMA 4500MHD and one ATI >> > Mobility Radeon HD 3650. When I boot with the Intel card, I get "irq 16: >> > nobody cared" during boot, not when I boot with the ATI card. >> >> Confirming this. After a lot of hassle, I have bisected this reliably to >> >> commit 28c70f162a315bdcfbe0bf940a740ef8bfb918d6 >> Author: Daniel Vetter <daniel.vet...@ffwll.ch> >> Date: Sat Dec 1 13:53:45 2012 +0100 >> >> drm/i915: use the gmbus irq for waits >> >> Adding Daniel, Imre and Daniel to CC while I will try to figure out what's >> happening in parallel. >> >> Attaching dmesg.txt from the machine with 28c70f162a as head, with >> drm.debug=0xe. > >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. > >-- >Jiri Kosina >SUSE Labs
