Arch Linux

damjan

Member

Registered: 2006-05-30

Posts: 462

Chicony Electronics webcam stopped working in 4.16 [solved]

I've installed the 4.16 from staging and my webcam stopped working. I've tried kamoso, Firefox and Chromium on sites like appear.in, talky.io, Google Hangouts and meet.jit.si.

There's no errors from the apps, nor in dmesg/journal. the same modules uvcvideo etc are loaded, the device exists on the usb bus, and shows up in /dev/video0.

But applications just refuse to use the camera in 4.16, while working fine in 4.15

anyone experienced the same?

The camera is:

Bus 001 Device 004: ID 04f2:b5ce Chicony Electronics Co., Ltd 

system logs (the same are in 4.15.x and 4.16):

kernel: Linux video capture interface: v2.00
kernel: uvcvideo: Found UVC 1.00 device Integrated Camera (04f2:b5ce)
kernel: uvcvideo 1-8:1.0: Entity type for entity Extension 4 was not initialized!
kernel: uvcvideo 1-8:1.0: Entity type for entity Extension 3 was not initialized!
kernel: uvcvideo 1-8:1.0: Entity type for entity Processing 2 was not initialized!
kernel: uvcvideo 1-8:1.0: Entity type for entity Camera 1 was not initialized!
kernel: usbcore: registered new interface driver uvcvideo
kernel: USB Video Class driver (1.1.1)

I'm not sure how to better debug the issue

Last edited by damjan (2018-04-07 12:33:27)

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: Chicony Electronics webcam stopped working in 4.16 [solved]

There aren't that many changes inside drivers/media/usb/uvc/ from v4.15 to v4.16, you could have a go at bisecting and check which commit breaks things and then report it upstream, stuff like this tends to be fixed quickly when someone points out a commit which breaks things.

---

R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K

damjan

Member

Registered: 2006-05-30

Posts: 462

Re: Chicony Electronics webcam stopped working in 4.16 [solved]

Reverting 088ead25524583e2200aa99111bea2f66a86545a seems to have helped. Will write to lkml

damjan

Member

Registered: 2006-05-30

Posts: 462

Re: Chicony Electronics webcam stopped working in 4.16 [solved]

ugh, correction, it's the reloading of the uvcvideo module what makes it work.

loqs

Member

Registered: 2014-03-06

Posts: 18,960

Re: Chicony Electronics webcam stopped working in 4.16 [solved]

Will write to lkml

You might want to consider some other more specific mailing lists as well https://bbs.archlinux.org/viewtopic.php … 7#p1777377

damjan

Member

Registered: 2006-05-30

Posts: 462

Re: Chicony Electronics webcam stopped working in 4.16 [solved]

I did thanks,

https://www.mail-archive.com/linux-medi … tml#128928

found a fix too
https://patchwork.linuxtv.org/patch/48417/

Last edited by damjan (2018-04-07 12:34:16)