Dom0 gui gets stuck with second monitor connected

[apparatus]

@st3f10

I have noticed another issue that could be related to the i915 driver version 2.20:
the suspend service doesn’t work reporting this error in the journalctl log:
gen 13 11:50:23 dom0 kernel: intel_pmc_core INT33A1:00: PM: dpm_run_callback(): acpi_subsys_suspend_late+0x0/0x50 returns -5
gen 13 11:50:23 dom0 kernel: intel_pmc_core INT33A1:00: PM: failed to suspend late: error -5
gen 13 11:50:23 dom0 kernel: PM: late suspend of devices failed

Looks like S3 suspend is not supported?

Troubleshooting failed suspend on Lenovo ThinkPad

I’m using the Lenovo ThinkPad X1 Carbon Gen 11. The BIOS doesn’t support s3 sleep so the only option is s2idle. Out of the box, Qubes OS 4.2 RC3 works well but doesn’t suspend. I tried upgrading dom0 to kernel-latest but the problem persists. Screen turns off, fans stop spinning, then screen flashes on once or twice, fans start spinning again, and the lock screen appears. Kernel logs show that the suspend was cancelled due to a hardware issue: Sep 23 17:20:20 dom0 kernel: PM: suspend exit Sep…