On 9/23/2020 1:09 PM, Stuart D. Gathman wrote:
I solved this problem a few years back.
https://github.com/sdgathman/trippfix
The short answer is USB is broken on the model (but the power management
is excellent, handling switchover to generator power without a hitch).
The workaround is to do a usb port power off when the Tripplite USB
hangs. But hubs that actually implement this mandatory feature (must at
least support powering all ports off) are getting hard to find. The USB
chips implement it just fine. The hubs don't bother connecting the pins
and just wire to +5V.
The good news is that with CentOS-8, the kernel automatically does the
port power off, so you don't need my kludgey software fix when you go to
8. You still need an actual standard conforming USB hub however.
If the port on your server isn't, you can buy an external hub
like I did.
Stuart, I haven't tried your program yet.
However the UPS appears to have dropped off completely. lsusb no longer
shows the unit at all. So I physically unplugged and replugged it:
#dmesg
...
[252389.354190] hid-generic 0003:0557:2419.0002: usb_submit_urb(ctrl)
failed: -19
[252389.403568] xhci_hcd 0000:00:14.0: USB bus 3 deregistered
[252389.405712] xhci_hcd 0000:00:14.0: xHCI Host Controller
[252389.407225] xhci_hcd 0000:00:14.0: new USB bus registered, assigned
bus number 3
[252405.901391] xhci_hcd 0000:00:14.0: can't setup: -110
[252405.902631] xhci_hcd 0000:00:14.0: USB bus 3 deregistered
[252405.903033] xhci_hcd 0000:00:14.0: init 0000:00:14.0 fail, -110
[252405.903038] xhci_hcd: probe of 0000:00:14.0 failed with error -110
And it's still not there:
$lsusb
Bus 002 Device 002: ID 8087:8002 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:800a Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
So is this a faulty Tripplite that needs to be returned?
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