Testing a HP ZBook G4

General system Kernel & Hardware
1

I am testing a HP ZBook G4.

Fan

The fan seems to be a mess (too fast very loud). nbfc-linux helps at least to get the fan faster turned off if it is not required.

USB

When trying to connect an external USB drive it was not recognized. Reason was that usb_storage was not loaded. After issung a modprobe usb_storage things were working fine.

I have no idea why it was not loaded automatically. The only error I found was
cdc_mbim 1-2:1.0: bind() failure

But it is still there after usb_storage is loaded and USB is working. Any idea here?

PS I should mention when starting from an EndeavourOS installation medium then usb_storage is loaded automatically.

1 Like
2

Next problem is that systemd-udevd burns a lot of CPU.

UID          PID    PPID  C STIME TTY          TIME CMD
root         892       1 87 17:06 ?        03:36:49 /usr/lib/systemd/systemd-udevd

uptime is 4:10h

3

I turned on debug for udevd service and thus seeing a lot of messages like

Aug 06 21:26:44 hogwart systemd-udevd[358598]: 1-2:1.5: SEQNUM=417210 blocked by SEQNUM=404675
Aug 06 21:26:44 hogwart systemd-udevd[358598]: 1-2:1.4: SEQNUM=417211 blocked by SEQNUM=404675
Aug 06 21:26:44 hogwart systemd-udevd[358598]: 1-2:1.4: SEQNUM=417212 blocked by SEQNUM=404675
Aug 06 21:26:44 hogwart systemd-udevd[358598]: 1-2:1.5: SEQNUM=417213 blocked by SEQNUM=404675
Aug 06 21:26:44 hogwart systemd-udevd[358598]: ttyACM2: SEQNUM=417214 blocked by SEQNUM=404675
Aug 06 21:26:44 hogwart systemd-udevd[358598]: 1-2:1.7: SEQNUM=417215 blocked by SEQNUM=404675
Aug 06 21:26:44 hogwart systemd-udevd[358598]: 1-2:1.6: SEQNUM=417216 blocked by SEQNUM=404675
Aug 06 21:26:44 hogwart systemd-udevd[358598]: 1-2:1.6: SEQNUM=417217 blocked by SEQNUM=404675
4

This I could solve by disabling WWAN in the bios.

5

Now, after udev behaving normally the usb_storage module gets loaded automatically when an external USB drive gets connected.