I tried to unplug the USB hub before machine finished zzz'ing. Then I hit the power button to wake up and: > it was very strange. the system came up. I plugged in USB hub. Keyboard > became operational. > I hit enter, shell on the console responded with # > I switched to X, then the system hung. So no backtrace.
dmesg: nvme0: DVACT_RESUME uhub2 at usb2 configuration 1 interface 0 "AMD xHCI root hub" rev 3.00/1.00 addr 1 uhub3 at usb3 configuration 1 interface 0 "AMD xHCI root hub" rev 3.00/1.00 addr 1 before intr_enable intr_enable inittodr sleep_resume resume_randomness resume_mp sched_start_secondary_cpus vfs_stall bufq_restart [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_dsc_pg_control line:365 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_dsc_pg_control line:373 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_dsc_pg_control line:381 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_dpp_pg_control line:436 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_hubp_pg_control line:510 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_dpp_pg_control line:444 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_hubp_pg_control line:518 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_dpp_pg_control line:452 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_hubp_pg_control line:526 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_dpp_pg_control line:460 [drm] REG_WAIT timeout 1us * 1000 tries - dcn20_hubp_pg_control line:534 config_suspend_all(DVACT_WAKEUP) sensor_restart start_periodic_resettodr wsdisplay_resume sys_sync uhub4 at uhub0 port 5 configuration 1 interface 0 "VIA Labs, Inc. USB2.0 Hub" rev 2.10/b.e0 addr 2 uhidev0 at uhub4 port 2 configuration 1 interface 0 "Yubico Yubico Gnubby (gnubby1)" rev 2.00/0.97 addr 3 uhidev0: iclass 3/0 fido0 at uhidev0: input=64, output=64, feature=0 ure0 at uhub4 port 3 configuration 1 interface 0 "Realtek USB 10/100/1000 LAN" rev 2.10/30.00 addr 4 ure0: RTL8153 (0x5c20), address 00:e0:4c:01:40:0c rgephy0 at ure0 phy 0: RTL8251 PHY, rev. 0 uhidev1 at uhub4 port 4 configuration 1 interface 0 "Microsoft Microsoft 3-Button Mouse with IntelliEye(TM)" rev 1.10/3.00 addr 5 uhidev1: iclass 3/1 ums0 at uhidev1: 3 buttons, Z dir wsmouse0 at ums0 mux 0 uhidev2 at uhub4 port 1 configuration 1 interface 0 "Kinesis Advantage2 Keyboard" rev 2.00/1.00 addr 6 uhidev2: iclass 3/1 ums1 at uhidev2: 3 buttons, Z dir wsmouse1 at ums1 mux 0 uhidev3 at uhub4 port 1 configuration 1 interface 1 "Kinesis Advantage2 Keyboard" rev 2.00/1.00 addr 6 uhidev3: iclass 3/1 ukbd0 at uhidev3: 8 variable keys, 6 key codes wskbd1 at ukbd0 mux 1 wskbd1: connecting to wsdisplay0 uhidev4 at uhub4 port 1 configuration 1 interface 2 "Kinesis Advantage2 Keyboard" rev 2.00/1.00 addr 6 uhidev4: iclass 3/0, 2 report ids ucc0 at uhidev4 reportid 1: 7 usages, 7 keys, enum wskbd2 at ucc0 mux 1 wskbd2: connecting to wsdisplay0 uhid0 at uhidev4 reportid 2: input=1, output=0, feature=0
