I have had this same issue for at least a year. It's still an issue with kernel 5.11.0. The following lines in the stack trace looks almost identical:
[292156.350702] ACPI: EC: interrupt blocked [292180.635315] ------------[ cut here ]------------ [292180.635318] WARNING: CPU: 1 PID: 297907 at kernel/workqueue.c:1419 __queue_work+0x2ce/0x340 [292180.635429] CPU: 1 PID: 297907 Comm: kworker/1:1 Tainted: P O 5.11.0-17- generic #18-Ubuntu ... [292180.635431] Hardware name: LENOVO 20QDCTO1WW/20QDCTO1WW, BIOS N2HET58W (1.41 ) 10/27/2020 [292180.635432] Workqueue: kec_query acpi_ec_event_processor [292180.635436] RIP: 0010:__queue_work+0x2ce/0x340 ... [292180.635450] Call Trace: [292180.635454] queue_work_on+0x3e/0x50 [292180.635455] acpi_ec_submit_query+0x69/0xa0 [292180.635457] advance_transaction+0x18b/0x4a0 Is there any workaround besides rebooting? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1896482 Title: acpi event detection crashes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1896482/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs