This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1888297
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1888297
Title:
usb camera only works once until reset
Status in linux package in Ubuntu:
Incomplete
Bug description:
I have a usb camera (SDI camera, attached to magewell usb capture)
which only works once. It displays the image in something like OBS
Studio or ffplay, and works perfectly. I can stop the capture. Then
trying to open the camera a second time does not work, I get a black
screen in ffplay/OBS.
To fix this, I can unplug the device and plug it back in, at which
point it works until stopped and restarted. So basically, I always
have to unplug it and plug it back in after stopping otherwise it
won't display an image a second time.
Debian 10 works perfectly fine using same physical hardware and video
software, but using (x)ubuntu 20.04 I get the problem as noted above.
So I suspect a kernel bug/regression.
I'm using an AMD 16 core system but don't know if it's related to
that. It makes no difference whether I use the USB ports on the
motherboard (USB 3.1), or whether I use an addon USB 3.1 PCI card.
(And debian doesn't care either which usb port I use, it works
correctly there across the board).
I have no idea how to report more information. I've done the software
updates etc., so whatever kernel is running in 20.04 as of this date,
that's what I'm using now.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1888297/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
