On 07.05.2021 17:14, Hans Petter Selasky wrote:
ster kernel: xhci_roothub_exec: port status=0x000202a0
May 7 14:39:08 hamster kernel: xhci_roothub_exec: type=0x23 request=0x01
wLen=0x0000 wValue=0x0010 wIndex=0x0002
May 7 14:39:08 hamster kernel: xhci_roothub_exec: UR_CLEAR_PORT_FEATURE
May 7 14:39:08 hamster kernel: xhci_device_state_change: May 7 14:39:08 hamster
kernel: ugen0.6: <PPC Offline UPS> at usbus0 (disconnected)
The value reported by XHCI PORTSC, 0x000202a0, indicates:
BIT5-8 : 5) Link is in the RxDetect State
BIT9 : Port Power (PP) – RWS. Default = ‘1’
BIT17 : Connect Status Change (CSC)
It is clear that the XHCI controller has received a disconnect event from the
UPS.
Can you check the other OS'es where this supposedly does not happen, if the UPS
device attaches to the XHCI or EHCI controller?
Windows 10 Device Manager shows it under "Intel(R) USB 3.1 eXtensible Host
Controller". This laptop (with Windows 10) has only USB-C ports...
I've captured sessions on Windows with "Device Monitoring Studio" and
WireShark (it was two sessions, not one) and uploaded them at
http://lev.serebryakov.spb.ru/_sklad/ups/
ups-windows-dms.dump - dump from "Device Monitoring Studio"
ups-windows-dms.log - log from "Device Monitoring Studio"
ups-windows-wireshark.pcapng - dump from WireShark
ups-windows-wireshark.txt - dissection export from WireShark.
My FreeBSD laptop (Lenovo T540p) has both USB 2.0 an USB 3.0 ports, and UPS
flickers in both.
Did you start any driver for the UPS?
On FreeBSD — I'm not (`nut` supports this UPS, but it detects device slower
than UPS stay connected).
Windows 10, Windows installs something generic and not very useful (it shows battery
level as 0%), but "provided" software (very crude one) works and shows
plausible information.
Windows 10 shows it as "HID UPS Battery" in device manager.
--
// Lev Serebryakov
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