Just FYI I have the same issue, and unfortunately no USB 2.0 port.
Lowering the resolution does work, but I would like to use 720p at
least.
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** Description changed:
My logitech c920 usb webcam doesn't work when connected to my usb 3.0
host controller (Etron EJ168a). When i connect my usb 3.0 stick to the
same port it's recognized and also works - just not the webcam.
disabling usb 3.0 legacy mode (xhci) in my bios doesn't
** Attachment added: grep xhci /var/log/kern.log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1319443/+attachment/4129193/+files/grep.usb.kern.log.txt
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** Attachment removed: grep xhci /var/log/kern.log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1319443/+attachment/4129193/+files/grep.usb.kern.log.txt
** Attachment added: grep.usb.kern.log+grep.xhci.kern.log
I've been asked to enable xhci dynamic debugging (xhci_hcd) with the
latest mainline kernel to provide better information about the problem.
Can you please tell how to do that - which console command I'd have to
input or which files I'd have to alter - I can't seem to get it -
googled around a
truthy, the next time you post to an upstream mailing list, one would
want to follow https://wiki.ubuntu.com/Bugs/Upstream/kernel , not send
some abbreviated post that would not be helpful to anyone in getting
your bug solved.
Despite this, you would want to respond to the requester to provide
Thank you for responding. Once again I'm sorry for bothering you
again/reopening the Bugreport. As it's the 1st time I ever reported any bug -
especially a kernel/upstream-bug - I hope you/they will be lenient and forgive
my breach of etiquette, format and whatever else I broke ... I submitted
as I found neither 'xhci' nor 'usb' in the changelog I doubt it would
work, but I'm gonna test it later today.
I already provided the information upstream requested in my reply to the
mailing list (see spinics/marc links above) with an external link as it's too
long to be put into the mail
no change with v3.15-rc7-utopic.
** Tags removed: kernel-bug-exists-upstream-3.15-rc6
** Tags added: kernel-bug-exists-upstream-3.15-rc7
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Title:
** Changed in: linux (Ubuntu)
Status: Confirmed = Triaged
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Title:
046d:082d Logitech c920 usb webcam not working when plugged into USB
penalvch, thx for your reply. tested with 3.15.0-031500rc6-generic
amd64. problem persists.
Response:
http://www.spinics.net/lists/linux-usb/msg108362.html
http://marc.info/?l=linux-usbm=140110305107599w=2
** Description changed:
My logitech c920 usb webcam doesn't work when connected to my
truthy, you would want to test the latest mainline kernel via
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-rc7-utopic/ and if
reproducible provide the information upstream requested. Quoting:
And it would be most helpful if you at least posted lsusb -v for your
camera.
** Changed in:
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