Comment 7 for bug 891270

Created attachment 53531
dmesg of S3 failure on 3.0

System environment:

chipset: ivybridge mobile
arch: x86_64
distro: ubuntu 11.10
kernels: 3.0.0-13.22 (3.0.6+backports), 3.1, 3.2-rc1
userspace: xserver: 1.10.4 and 1.11.2
            libdrm: 2.4.26 and git master (nov 10th)
            mesa: 7.11 and git master (nov 10th)
            xf86-video-intel: 2.16 and git master (nov 10th)

Starting after bios updates in mid october, all ivybridge systems we have come across are exhibiting strange behavior. 3.0 kernels did not boot until "drm/i915: enable ring freq scaling, RC6 and graphics turbo on Ivy Bridge v3" was backported from 3.1 and i915 failed to load with this error

 [drm:init_status_page], render ring hws offset: 0x00000000
 [drm:init_ring_common] *ERROR* render ring initialization failed ctl 00000000 head 00000000 tail 00000000 start 00000000
 [drm:i915_driver_load] *ERROR* failed to init modeset

Now they come up, but every kernel tried oopses on resume from S3 or S4 every time. Attached are logs of the oops on various kernels. Downgrading the bios avoids the problem on every machine, but this affects machines from multiple ODM's including a reference platform from Intel after a bios update.