System blanked and required hard reboot

[arbitrary-dev]

Distribution:

NAME="Pop!_OS"
VERSION="20.10"

$ uname -r
5.11.0-7614-generic

Issue Description:
I was listenning to the YouTube on my BT headset with the notebook lid closed.
Then music stopped, I went to check out what's happened and the screen was black, and system didn't respond to any keys.
So I hard rebooted it with holding the power button.

Other Notes:
Happened around 14:17, I guess:
journalctl.log

[arbitrary-dev]

Also another unexpected reboot happened while lid was closed around 21:52
journalctl.log

[jacobgkau]

Is this happening on System76 hardware or third-party hardware? What are the make/model and specifications of the machine? Do similar issues occur with Ubuntu or other distributions?

---

System76 customers can reach out to support for technical assistance. For non-System76 hardware, you can seek community support on Reddit or Mattermost.

[arbitrary-dev]

I'm on System76 hardware:

Lemur Pro

Pop!_OS 20.10 (64-bit) with full disk-encryption
14.1" Matte 1080p FHD Display
Intel® Iris® Xe Graphics
4.7 GHz i7-1165G7 (12MB Cache – 4 Cores – 8 Threads)
40 GB DDR4 at 3200MHz (8GB+32GB)
1 TB PCIe Gen4 Seq Read: 7,000 MB/s, Seq Write: 5,000 MB/s
No Additional M.2 NVMe Storage
United States Keyboard
WiFi 6 + Bluetooth
1 Year Limited Parts and Labor Warranty
Normal Assembly Service

Do similar issues occur with Ubuntu or other distributions?

Don't know.

System76 support contacted and linked to this issue.

[bflanagin]

@arbitrary-dev:
This sounds like pop-os/linux#45 if you are willing, try the fix Kanru suggests near the bottom of the ticket.

[arbitrary-dev]

I set intel_idle.max_cstate=3, but still my lemp10 went unresponsive after some time laying unattended with lid closed.

[arbitrary-dev]

I'm curious, why does my CPU have so few C-states available, and why they all have _ACPI suffix?

$ grep . /sys/devices/system/cpu/cpu0/cpuidle/state*/name
/sys/devices/system/cpu/cpu0/cpuidle/state0/name:POLL
/sys/devices/system/cpu/cpu0/cpuidle/state1/name:C1_ACPI
/sys/devices/system/cpu/cpu0/cpuidle/state2/name:C2_ACPI
/sys/devices/system/cpu/cpu0/cpuidle/state3/name:C3_ACPI

[arbitrary-dev]

Still hangs with lid closed on new kernel 5.11.0-7614

[arbitrary-dev]

Neither of the params suggested in #449 helped:

• mem_sleep_default=shallow (have no deep state available)
• rcutree.rcu_idle_gp_delay=1
• snd_hda_intel.dmic_detect=0