[Bug 98690] [SKL bisected] System freeze when starting X using kernel 4.9-rc1 or later

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98690

Barry G <barry at grussling.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |barry at grussling.com

--- Comment #67 from Barry G <barry at grussling.com> ---
Hi all,

Google brought me here as I am having the same issue as Bastian since upgrading
from 4.9.11 (worked great) to 4.10.1 (Xorg won't start):
[ 1242.018471] INFO: task kworker/15:1:175 blocked for more than 120 seconds.
[ 1242.019277]       Tainted: P          IO    4.10.5-1-ARCH #1
[ 1242.020065] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 1242.020866] kworker/15:1    D    0   175      2 0x00000000
[ 1242.020877] Workqueue: pm pm_runtime_work
[ 1242.020879] Call Trace:
[ 1242.020886]  __schedule+0x22f/0x700
[ 1242.020890]  schedule+0x3d/0x90
[ 1242.020893]  rpm_resume+0x118/0x6f0
[ 1242.020897]  ? wake_atomic_t_function+0x60/0x60
[ 1242.020901]  ? pci_pm_runtime_resume+0xa0/0xa0
[ 1242.020904]  pm_runtime_forbid+0x4c/0x60
[ 1242.020945]  nouveau_pmops_runtime_suspend+0xcc/0xd0 [nouveau]
[ 1242.020949]  pci_pm_runtime_suspend+0x55/0x180
[ 1242.020952]  ? pci_pm_runtime_resume+0xa0/0xa0
[ 1242.020955]  __rpm_callback+0xb9/0x1f0
[ 1242.020958]  rpm_callback+0x24/0x80
[ 1242.020961]  ? pci_pm_runtime_resume+0xa0/0xa0
[ 1242.020963]  rpm_suspend+0x132/0x690
[ 1242.020966]  ? finish_task_switch+0x78/0x200
[ 1242.020969]  pm_runtime_work+0x6f/0xb0
[ 1242.020974]  process_one_work+0x1e5/0x470
[ 1242.020977]  worker_thread+0x48/0x4e0
[ 1242.020980]  kthread+0x101/0x140
[ 1242.020983]  ? process_one_work+0x470/0x470
[ 1242.020986]  ? kthread_create_on_node+0x60/0x60
[ 1242.020988]  ret_from_fork+0x2c/0x40

Not sure if this is the same issue as I have dual Nvidia GTX 980s (nouveau). 
Reverting to 4.9 fixes stuff and my desktop opens on startup.  Would be happy
to open another bug if you desire but the PM stuff seems to make them related?

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