On Fri, 15 Mar 2013, Harald Arnesen 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.vetter@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.