I tested with:
4.6.0-040600rc4-generic #201604172330 SMP Mon Apr 18 03:32:32 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
I can confirm that this one does not hang during resume after trying
about ten times.
Two times out of 10 I got this in dmesg:
[ 77.422675] ------------[ cut here ]------------
[ 77.422733] WARNING: CPU: 0 PID: 2141 at
/home/kernel/COD/linux/drivers/gpu/drm/i915/intel_uncore.c:649
__unclaimed_reg_debug+0x80/0x90 [i915]
[ 77.422735] Unclaimed register detected after reading register 0x65f10
[ 77.422789] Modules linked in: drbg ansi_cprng ctr ccm msr bnep binfmt_misc
dm_crypt arc4 intel_rapl x86_pkg_temp_thermal snd_soc_skl acer_wmi
intel_powerclamp sparse_keymap coretemp kvm_intel snd_soc_skl_ipc
snd_soc_sst_ipc kvm snd_soc_sst_dsp irqbypass snd_hda_codec_hdmi
snd_hda_ext_core snd_soc_sst_match crct10dif_pclmul snd_soc_core crc32_pclmul
ghash_clmulni_intel iwlmvm snd_hda_codec_conexant aesni_intel
snd_hda_codec_generic mac80211 snd_compress ac97_bus aes_x86_64 lrw gf128mul
glue_helper snd_pcm_dmaengine ablk_helper dw_dmac_core cryptd snd_hda_intel
iwlwifi snd_hda_codec input_leds joydev snd_hda_core snd_hwdep serio_raw
uvcvideo cdc_mbim cdc_wdm videobuf2_vmalloc videobuf2_memops qcserial cdc_ncm
snd_pcm videobuf2_v4l2 usbnet usb_wwan videobuf2_core mii videodev usbserial
rtsx_pci_ms
[ 77.422824] cfg80211 media memstick btusb btrtl btbcm btintel bluetooth
thinkpad_acpi nvram snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq mei_me
mei shpchp snd_seq_device intel_pch_thermal snd_timer snd soundcore mac_hid
parport_pc ppdev lp parport autofs4 i915 i2c_algo_bit drm_kms_helper
rtsx_pci_sdmmc e1000e syscopyarea sysfillrect ptp sysimgblt psmouse fb_sys_fops
pps_core ahci rtsx_pci drm libahci wmi video fjes
[ 77.422828] CPU: 0 PID: 2141 Comm: kworker/u16:6 Not tainted
4.6.0-040600rc4-generic #201604172330
[ 77.422830] Hardware name: LENOVO 20FB003PMS/20FB003PMS, BIOS N1FET37W (1.11
) 03/15/2016
[ 77.422839] Workqueue: events_unbound async_run_entry_fn
[ 77.422844] 0000000000000086 000000003e1632fd ffff880089e47a58
ffffffff813eee03
[ 77.422848] ffff880089e47aa8 0000000000000000 ffff880089e47a98
ffffffff810827cb
[ 77.422851] 0000028989e47a78 0000000000000000 0000000000000001
0000000000065f10
[ 77.422852] Call Trace:
[ 77.422862] [<ffffffff813eee03>] dump_stack+0x63/0x90
[ 77.422867] [<ffffffff810827cb>] __warn+0xcb/0xf0
[ 77.422871] [<ffffffff8108284f>] warn_slowpath_fmt+0x5f/0x80
[ 77.422915] [<ffffffffc01e6db0>] __unclaimed_reg_debug+0x80/0x90 [i915]
[ 77.422953] [<ffffffffc01ec85b>] gen9_read32+0x35b/0x390 [i915]
[ 77.422996] [<ffffffffc01f2dd9>]
i915_audio_component_codec_wake_override+0x39/0xb0 [i915]
[ 77.423008] [<ffffffffc061aa8f>] snd_hdac_set_codec_wakeup+0x3f/0xa0
[snd_hda_core]
[ 77.423014] [<ffffffffc037b0b4>] azx_runtime_resume+0x184/0x1a0
[snd_hda_intel]
[ 77.423019] [<ffffffff8144175b>] pci_pm_runtime_resume+0x7b/0xa0
[ 77.423025] [<ffffffff81562303>] __rpm_callback+0x33/0x70
[ 77.423029] [<ffffffff814416e0>] ? pci_restore_standard_config+0x40/0x40
[ 77.423033] [<ffffffff81562364>] rpm_callback+0x24/0x80
[ 77.423037] [<ffffffff814416e0>] ? pci_restore_standard_config+0x40/0x40
[ 77.423040] [<ffffffff81562b11>] rpm_resume+0x491/0x690
[ 77.423046] [<ffffffff810ad610>] ? check_preempt_curr+0x80/0x90
[ 77.423050] [<ffffffff8156359e>] __pm_runtime_resume+0x4e/0x70
[ 77.423054] [<ffffffff8144292c>] pci_pm_suspend+0x5c/0x140
[ 77.423059] [<ffffffff814428d0>] ? pci_pm_freeze+0xe0/0xe0
[ 77.423064] [<ffffffff81564bce>] dpm_run_callback+0x4e/0x130
[ 77.423069] [<ffffffff81565968>] __device_suspend+0x148/0x370
[ 77.423073] [<ffffffff81565baf>] async_suspend+0x1f/0xa0
[ 77.423078] [<ffffffff810a5bd8>] async_run_entry_fn+0x48/0x150
[ 77.423083] [<ffffffff8109ca25>] process_one_work+0x165/0x480
[ 77.423088] [<ffffffff8109cd8b>] worker_thread+0x4b/0x500
[ 77.423093] [<ffffffff8109cd40>] ? process_one_work+0x480/0x480
[ 77.423097] [<ffffffff8109cd40>] ? process_one_work+0x480/0x480
[ 77.423100] [<ffffffff810a3178>] kthread+0xd8/0xf0
[ 77.423105] [<ffffffff8183fb62>] ret_from_fork+0x22/0x40
[ 77.423109] [<ffffffff810a30a0>] ? kthread_create_on_node+0x1a0/0x1a0
[ 77.423111] ---[ end trace 16296147ce748c35 ]---
But everything seems to work as far as I can tell.
** Tags added: kernel-fixed-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1570484
Title:
Resuming from suspend on Lenovo ThinkPad X1 Carbon 4th gen does not
work reliably
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