What steps will reproduce the problem?
1. Plug in the Somagic USB device, it shows up properly in dmesg:
[ 6.488608] usb 2-1: New USB device found, idVendor=1c88, idProduct=003c
[ 6.488613] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 6.488615] usb 2-1: Product: SMI Grabber DEV
[ 6.488617] usb 2-1: Manufacturer: Somagic, Inc.
[ 6.488619] usb 2-1: SerialNumber: SMIGRABBER9876543210
[ 6.542011] bcma-pci-bridge 0000:07:00.0: no hotplug settings from platform
[ 6.604178] saa7115 7-004a: gm7113c found @ 0x94 (smi2021)
[ 6.611733] 8:3:1: cannot get freq at ep 0x84
[ 6.621221] usb_audio: Warning! Unlikely big volume range (=3328), cval->res
is probably wrong.
[ 6.621226] usb_audio: [2] FU [Mic Capture Volume] ch = 1, val =
4608/7936/1<6>
[ 6.621485] usbcore: registered new interface driver snd-usb-audio
[ 6.630083] smi2021 2-1:1.0: Somagic Easy-Cap Video Grabber
2. Run VLC
3. Select Media -> Open Capture Device
4. Choose video device, here /dev/video1, and click play (Video playback starts)
5. Select again Media -> Open Capture Device
6. Choose some random audio device and click play
This will trigger the panic. Always. It's easily reproducible for me.
I downloaded and built the smi2021 module just today according to the
"BuildingKernelModule" section in your wiki. I built a whole kernel from source
on my Ubuntu 14.04 and installed the debs.
Screenshot of the panic is attached. Sorry for the bad quality, taken with a
budget phone :)
Original issue reported on code.google.com by mvey...@gmail.com on 25 Nov 2014 at 5:58
Original issue reported on code.google.com by
mvey...@gmail.comon 25 Nov 2014 at 5:58Attachments: