Public bug reported:
My system tries to enter suspend, but bails back out with the following:
[77808.028591] WARNING: CPU: 2 PID: 20791 at
/build/buildd/linux-3.13.0/drivers/gpu/drm/i915/intel_uncore.c:125
gen6_gt_check_fifodbg.isra.9+0x38/0x50 [i915]()
[77808.028592] MMIO read or write has been dropped ffffffff
[ modules list ]
[77808.028622] CPU: 2 PID: 20791 Comm: kworker/u16:68 Tainted: G W
3.13.0-11-generic #31-Ubuntu
[77808.028623] Hardware name: LENOVO 23301B9/23301B9, BIOS G2ET95WW (2.55 )
07/09/2013
[77808.028634] Workqueue: i915 gen6_force_wake_work [i915]
[77808.028636] 0000000000000009 ffff88008dca1d38 ffffffff817163b5
ffff88008dca1d80
[77808.028637] ffff88008dca1d70 ffffffff8106450d ffff88020d7ec020
ffff88020d7ec028
[77808.028639] 0000000000000246 0000000000000000 0000000000000200
ffff88008dca1dd0
[77808.028639] Call Trace:
[77808.028644] [<ffffffff817163b5>] dump_stack+0x45/0x56
[77808.028646] [<ffffffff8106450d>] warn_slowpath_common+0x7d/0xa0
[77808.028648] [<ffffffff8106457c>] warn_slowpath_fmt+0x4c/0x50
[77808.028659] [<ffffffffa0159d98>] gen6_gt_check_fifodbg.isra.9+0x38/0x50
[i915]
[77808.028668] [<ffffffffa0159e3b>] __gen6_gt_force_wake_mt_put+0x2b/0x30
[i915]
[77808.028677] [<ffffffffa0159b67>] gen6_force_wake_work+0x37/0x50 [i915]
[77808.028679] [<ffffffff81080702>] process_one_work+0x182/0x450
[77808.028681] [<ffffffff810814a1>] worker_thread+0x121/0x410
[77808.028682] [<ffffffff81081380>] ? rescuer_thread+0x3e0/0x3e0
[77808.028684] [<ffffffff810880f2>] kthread+0xd2/0xf0
[77808.028685] [<ffffffff81088020>] ? kthread_create_on_node+0x190/0x190
[77808.028687] [<ffffffff81726cfc>] ret_from_fork+0x7c/0xb0
[77808.028688] [<ffffffff81088020>] ? kthread_create_on_node+0x190/0x190
[77808.028689] ---[ end trace a01b8488029b5090 ]---
$ uname -a
Linux icarus 3.13.0-11-generic #31-Ubuntu SMP Wed Feb 19 19:57:21 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Full backtrace from kernel log"
https://bugs.launchpad.net/bugs/1284372/+attachment/3995072/+files/suspend-fail
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https://bugs.launchpad.net/bugs/1284372
Title:
Failure to suspend on Lenovo X230
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