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#1 2017-03-29 17:51:02

titaniumbones
Member
Registered: 2013-12-20
Posts: 52

Debugging suspend on a thinkpad t460s

I am having intermittent crashes on suspend with my thinkpad t460s, running Gnome and a mostly up-to-date Arch.  In general supsend/resume works fine. Occasionally, though -- usually aobut twice a week - -when I open the laptop lid to resume, I see the power button is flashing and the laptop does not spontaneously wake up. Instead, I have to long-press the power button and reboot.  This is what i see in journalctl -r:

Mar 28 19:25:00 ansul kernel: x86/fpu: Supporting XSAVE feature 0x010: 'MPX CSR'
Mar 28 19:25:00 ansul kernel: x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registers'
Mar 28 19:25:00 ansul kernel: x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
Mar 28 19:25:00 ansul kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Mar 28 19:25:00 ansul kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
Mar 28 19:25:00 ansul kernel: Command line: initrd=\initramfs-linux.img root=UUID=cabd4fc7-a998-4a4b-ba25-59d3a4480eda rw  rootfstype=btrfs add_efi_memmap intel_pstate=no_hwp
Mar 28 19:25:00 ansul kernel: Linux version 4.10.1-1-ARCH (builduser@heftig-13232) (gcc version 6.3.1 20170109 (GCC) ) #1 SMP PREEMPT Sun Feb 26 21:08:53 UTC 2017
Mar 28 19:25:00 ansul systemd-journald[186]: Time spent on flushing to /var is 1.041ms for 0 entries.
-- Reboot --
Mar 28 19:21:57 ansul systemd-sleep[27000]: Suspending system...
Mar 28 19:21:57 ansul systemd[1]: Stopped Atop advanced performance monitor.
Mar 28 19:21:57 ansul systemd[1]: Stopping Atop advanced performance monitor...
Mar 28 19:21:57 ansul systemd[1]: Starting Suspend...
Mar 28 19:21:57 ansul systemd[1]: Reached target Sleep.
Mar 28 19:21:54 ansul wpa_supplicant[560]: nl80211: deinit ifname=wlp4s0 disabled_11b_rates=0
Mar 28 19:21:54 ansul wpa_supplicant[560]: nl80211: deinit ifname=p2p-dev-wlp4s0 disabled_11b_rates=0

These messages don't look especially informative -- is there a way to get closer to the cause of the issue?  Thanks!

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#2 2017-04-04 11:32:11

shaoyu0209
Member
From: Taiwan
Registered: 2016-10-28
Posts: 42

Re: Debugging suspend on a thinkpad t460s

Same here. Though, I don't think you have to long press the power button. You can try pressing only the power button once and wait for a few second to see if it will start.
You may also want to post your dmesg output. That may be more informative.

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#3 2017-04-04 11:57:07

titaniumbones
Member
Registered: 2013-12-20
Posts: 52

Re: Debugging suspend on a thinkpad t460s

I'm a few days out from my last resume failure -- is there a way to filter dmesg by timestamp?

Anyway, I'll try to remember to run dmesg right after my next failure.  Meanwhile, if you figure anything out yourself I would love to hear it...

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