Kim Kulak
2014-01-28 23:43:01 UTC
Hello,
Friend of mine recently bought a web cam for his Ubuntu system, which
doesn't work. I'm running Ubuntu 13.10 and it behaves exactly the same
for me.I've tried the camera with cheese, qv4l2, guvcview and luvcview
and with all of them the image I get is a solid green screen with some
moving horizontal black lines.
I've followed the troubleshooting procedure from the FAQ, the
generated lsusb.log and dmesg.log files are attached.
BTW: the commands to turn uvcmodule traces on and off gave me a
"Permission denied" error message. Quite a common mistake with sudo.
The shell will try to open the output file before sudo has set the
privilege of the echo command. The command you need is of the form:
sudo bash -c "echo 0 > /sys/module/uvcvideo/parameters/trace"
This way sudo will elevate the privilege of the bash command before it
opens the output file.
All the best,
Kim Kulak
Friend of mine recently bought a web cam for his Ubuntu system, which
doesn't work. I'm running Ubuntu 13.10 and it behaves exactly the same
for me.I've tried the camera with cheese, qv4l2, guvcview and luvcview
and with all of them the image I get is a solid green screen with some
moving horizontal black lines.
I've followed the troubleshooting procedure from the FAQ, the
generated lsusb.log and dmesg.log files are attached.
BTW: the commands to turn uvcmodule traces on and off gave me a
"Permission denied" error message. Quite a common mistake with sudo.
The shell will try to open the output file before sudo has set the
privilege of the echo command. The command you need is of the form:
sudo bash -c "echo 0 > /sys/module/uvcvideo/parameters/trace"
This way sudo will elevate the privilege of the bash command before it
opens the output file.
All the best,
Kim Kulak