Hello all,
I'm not too sure where to report this but I got an unusual output in dmesg a couple of days ago and wanted to pass it on. Please let me know if I need to submit a bug report too.
[ 4056.074906] Unclaimed read from register 0x1f0034
[ 4056.074990] ------------[ cut here ]------------
[ 4056.075021] WARNING: CPU: 0 PID: 5286 at drivers/gpu/drm/i915/intel_uncore.c:792 __unclaimed_reg_debug+0x43/0x60
[ 4056.075030] Modules linked in:
[ 4056.075036] CPU: 0 PID: 5286 Comm: systemd-sleep Not tainted 4.13.0-rc1+ #2
[ 4056.075038] Hardware name: GOOGLE Banon, BIOS 07/01/2016
[ 4056.075040] task: ffff98dd76c1f2c0 task.stack: ffffb391007f4000
[ 4056.075044] RIP: 0010:__unclaimed_reg_debug+0x43/0x60
[ 4056.075046] RSP: 0018:ffffb391007f78e8 EFLAGS: 00010092
[ 4056.075049] RAX: 0000000000000025 RBX: 0000000000000000 RCX: 0000000000000002
[ 4056.075051] RDX: 0000000080000002 RSI: 0000000000000086 RDI: 0000000000000002
[ 4056.075052] RBP: ffffb391007f7900 R08: 0000000000000000 R09: 0000000000000025
[ 4056.075054] R10: 0000000000000018 R11: 0000000000000000 R12: 00000000001f0034
[ 4056.075056] R13: 0000000000000001 R14: ffff98dd76c90688 R15: 0000000000000000
[ 4056.075059] FS: 00007f16edaba740(0000) GS:ffff98ddbc800000(0000) knlGS:0000000000000000
[ 4056.075061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4056.075062] CR2: 00007ffc7e05b3f9 CR3: 00000000377b6000 CR4: 00000000001006f0
[ 4056.075066] Call Trace:
[ 4056.075074] fwtable_read32+0x1dd/0x1f0
[ 4056.075083] vlv_program_watermarks+0x3ea/0x670
[ 4056.075088] vlv_optimize_watermarks+0xa4/0xc0
[ 4056.075093] intel_atomic_commit_tail+0x33e/0xf90
[ 4056.075098] intel_atomic_commit+0x3a0/0x490
[ 4056.075103] ? intel_runtime_pm_put+0x56/0xa0
[ 4056.075108] drm_atomic_commit+0x4b/0x50
[ 4056.075115] drm_atomic_helper_commit_duplicated_state+0xc4/0xd0
[ 4056.075118] __intel_display_resume+0x86/0xd0
[ 4056.075121] intel_display_resume+0xc1/0xe0
[ 4056.075128] i915_drm_resume+0xde/0x180
[ 4056.075131] i915_pm_restore+0x1e/0x30
[ 4056.075134] i915_pm_resume+0xe/0x10
[ 4056.075139] pci_pm_resume+0x64/0xa0
[ 4056.075145] dpm_run_callback+0x56/0x180
[ 4056.075148] ? pci_pm_freeze+0xe0/0xe0
[ 4056.075151] device_resume+0xe1/0x1f0
[ 4056.075154] dpm_resume+0x10d/0x320
[ 4056.075157] dpm_resume_end+0x11/0x20
[ 4056.075162] suspend_devices_and_enter+0x13c/0x7b0
[ 4056.075166] pm_suspend+0x31d/0x390
[ 4056.075169] state_store+0x82/0xf0
[ 4056.075177] kobj_attr_store+0xf/0x20
[ 4056.075183] sysfs_kf_write+0x37/0x40
[ 4056.075186] kernfs_fop_write+0x107/0x180
[ 4056.075193] __vfs_write+0x28/0x130
[ 4056.075199] ? __this_cpu_preempt_check+0x13/0x20
[ 4056.075204] ? __sb_start_write+0xa0/0xe0
[ 4056.075207] vfs_write+0xb8/0x1b0
[ 4056.075210] SyS_write+0x46/0xa0
[ 4056.075217] entry_SYSCALL_64_fastpath+0x1e/0xa9
[ 4056.075221] RIP: 0033:0x7f16ed1c0290
[ 4056.075223] RSP: 002b:00007fffe4f9c618 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 4056.075226] RAX: ffffffffffffffda RBX: 00007f16ed48db20 RCX: 00007f16ed1c0290
[ 4056.075228] RDX: 0000000000000004 RSI: 0000006d029693d0 RDI: 0000000000000004
[ 4056.075229] RBP: 0000000000001011 R08: 0000006d02969280 R09: 00007f16edaba740
[ 4056.075231] R10: 00007f16ed48db78 R11: 0000000000000246 R12: 00007f16ed48db78
[ 4056.075233] R13: 00007f16ed48db78 R14: 000000000000270f R15: 00007f16ed48db78
[ 4056.075236] Code: fe ff ff 38 d8 76 2d 45 84 ed 48 c7 c0 98 40 41 ac 48 c7 c6 a2 40 41 ac 48 0f 45 f0 44 89 e2 48 c7 c7 ab 40 41 ac e8 5e 51 a5 ff <0f> ff 83 2d b0 8d 0f 01 01 5b 41 5c 41 5d 5d c3 0f 1f 00 66 2e
[ 4056.075296] ---[ end trace 1bdf66ea2a802075 ]---
I believe this is the result of a wake command and I don't believe that it caused any loss in functionality. Let me know if I should do some testing.
Thanks,
Chris
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