Comment # 69 on bug 1137748 from Ian Jones

I am experiencing something similar. I experienced it also on 15.0. I upgraded
to 15.1 to try to solve it. Suspend often fails but not always. These errors
are in the journal:

Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
PM: Suspending system (mem)
Suspending console(s) (use no_console_suspend to debug)
sd 0:0:0:0: [sda] Synchronizing SCSI cache
sd 0:0:0:0: [sda] Stopping disk
xhci_hcd 0000:06:00.0: WARN: xHC CMD_RUN timeout
suspend_common(): xhci_pci_suspend+0x0/0xd0 [xhci_pci] returns -110
pci_pm_suspend(): hcd_pci_suspend+0x0/0x30 [usbcore] returns -110
dpm_run_callback(): pci_pm_suspend+0x0/0x130 returns -110
PM: Device 0000:06:00.0 failed to suspend async: error -110
PM: Some devices failed to suspend, or early wake event detected
sd 0:0:0:0: [sda] Starting disk
ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata5: SATA link down (SStatus 0 SControl 300)
ata2.00: configured for UDMA/100

The screen is blank but the power hasn't gone off. When I press power and login
I have no networking with Wicked, so had to switch to network manager, which
recovers networking automatically.

Is this connected?
4.12.14-lp151.28.36-default #1 SMP Fri Dec 6 13:50:27 UTC 2019 (8f4a495) x86_64
x86_64 x86_64 GNU/Linux