1 |
How's it going dudes? |
2 |
|
3 |
I bought a Logitech C270 webcam from Argos about a year ago, which, according to |
4 |
the LKDDb [1] and U.V.C. driver website [2], should work well on Linux. Despite |
5 |
working flawlessly until recently, some strange behaviour has appeared. |
6 |
|
7 |
When I connect the webcam, `dmesg` registers it as would be expected (timestamps |
8 |
omitted): |
9 |
|
10 |
usb 3-7: new high-speed USB device number 14 using xhci_hcd |
11 |
usb 3-7: New USB device found, idVendor=046d, idProduct=0825, bcdDevice= 0.12 |
12 |
usb 3-7: New USB device strings: Mfr=0, Product=0, SerialNumber=2 |
13 |
usb 3-7: SerialNumber: 9EEFE4E0 |
14 |
uvcvideo: Found UVC 1.00 device <unnamed> (046d:0825) |
15 |
input: UVC Camera (046d:0825) as /devices/pci0000:00/0000:00:14.0/usb3/3-7/3-7:1.0/input/input27 |
16 |
usb 3-7: set resolution quirk: cval->res = 384 |
17 |
|
18 |
However, about two seconds later, me having done nothing, the kernel ring buffer |
19 |
suggests it has been physically unplugs, and thus deregisters the device... |
20 |
|
21 |
USB disconnect, device number 14 |
22 |
|
23 |
I have tested this on another very similar machine, and this problem is not to |
24 |
be seen, and everything works perfectly; thus ruling out a hardware issue with |
25 |
the camera. Furthermore, no other devices---even other U.V.C. webcams---do not |
26 |
present with the same symptoms on my machine, in the same U.S.B. port; thus |
27 |
ruling out any issue with the physical port or motherboard controller. |
28 |
|
29 |
I have no idea how to triage this further. I feel like my head has been nailed |
30 |
to a coffee table by Dinsdale Piranha. Any tips? My kernel is 5.9.13-zen1, |
31 |
although this trouble presents identically on a vanilla kernel. |
32 |
|
33 |
Cheers. |
34 |
|
35 |
Hope everyone is remaining well. |
36 |
|
37 |
[1] https://linux-hardware.org/index.php?id=usb:046d-0825 |
38 |
[2] https://www.ideasonboard.org/uvc/#devices |
39 |
|
40 |
-- |
41 |
|
42 |
Ashley Dixon |
43 |
suugaku.co.uk |
44 |
|
45 |
2A9A 4117 |
46 |
DA96 D18A |
47 |
8A7B B0D2 |
48 |
A30E BF25 |
49 |
F290 A8AA |