CCing a few people and lists that should be aware of this and might be able to help. On 05.06.23 18:39, Poncho wrote: > With kernel 6.3, the LED of my C922 Pro Stream Webcam is no longer > controllable. > > With kernel 6.1 v4l2-ctl --all returns: > >> led1_mode 0x0a046d05 (menu) : min=0 max=3 default=0 value=0 (Off) >> 0: Off >> 1: On >> 2: Blink >> 3: Auto > > > > but with kernel 6.3 I get: > >> led1_mode 0x0a046d05 (menu) : min=4 max=4 default=0 value=0 >> 4: Thanks for the report. FWIW, maybe one of those people that I CCed has an idea what's wrong. If none of them brings one to the table withing the next two or three days, you likely have to perform a bisection to find the change that broke thing for you. For the rest of this mail: [TLDR: I'm adding this report to the list of tracked Linux kernel regressions; the text you find below is based on a few templates paragraphs you might have encountered already in similar form. See link in footer if these mails annoy you.] > Full output bellow: > >> Driver Info: >> Driver name : uvcvideo >> Card type : C922 Pro Stream Webcam >> Bus info : usb-0000:00:14.0-9 >> Driver version : 6.3.5 >> Capabilities : 0x84a00001 >> Video Capture >> Metadata Capture >> Streaming >> Extended Pix Format >> Device Capabilities >> Device Caps : 0x04200001 >> Video Capture >> Streaming >> Extended Pix Format >> Media Driver Info: >> Driver name : uvcvideo >> Model : C922 Pro Stream Webcam >> Serial : 6E8DF1BF >> Bus info : usb-0000:00:14.0-9 >> Media version : 6.3.5 >> Hardware revision: 0x00000016 (22) >> Driver version : 6.3.5 >> Interface Info: >> ID : 0x03000002 >> Type : V4L Video >> Entity Info: >> ID : 0x00000001 (1) >> Name : C922 Pro Stream Webcam >> Function : V4L2 I/O >> Flags : default >> Pad 0x01000007 : 0: Sink >> Link 0x0200001f: from remote pad 0x100000a of entity 'Processing >> 3' (Video Pixel Formatter): Data, Enabled, Immutable >> Priority: 2 >> Video input : 0 (Camera 1: ok) >> Format Video Capture: >> Width/Height : 160/90 >> Pixel Format : 'YUYV' (YUYV 4:2:2) >> Field : None >> Bytes per Line : 320 >> Size Image : 28800 >> Colorspace : sRGB >> Transfer Function : Rec. 709 >> YCbCr/HSV Encoding: ITU-R 601 >> Quantization : Default (maps to Limited Range) >> Flags : Crop Capability Video Capture: >> Bounds : Left 0, Top 0, Width 160, Height 90 >> Default : Left 0, Top 0, Width 160, Height 90 >> Pixel Aspect: 1/1 >> Selection Video Capture: crop_default, Left 0, Top 0, Width 160, >> Height 90, Flags: Selection Video Capture: crop_bounds, Left 0, Top 0, >> Width 160, Height 90, Flags: Streaming Parameters Video Capture: >> Capabilities : timeperframe >> Frames per second: 30.000 (30/1) >> Read buffers : 0 >> >> User Controls >> >> brightness 0x00980900 (int) : min=0 max=255 >> step=1 default=128 value=128 >> contrast 0x00980901 (int) : min=0 max=255 >> step=1 default=128 value=128 >> saturation 0x00980902 (int) : min=0 max=255 >> step=1 default=128 value=128 >> white_balance_automatic 0x0098090c (bool) : default=1 value=1 >> gain 0x00980913 (int) : min=0 max=255 >> step=1 default=0 value=0 >> power_line_frequency 0x00980918 (menu) : min=0 max=2 >> default=2 value=2 (60 Hz) >> 0: Disabled >> 1: 50 Hz >> 2: 60 Hz >> white_balance_temperature 0x0098091a (int) : min=2000 >> max=6500 step=1 default=4000 value=4000 flags=inactive >> sharpness 0x0098091b (int) : min=0 max=255 >> step=1 default=128 value=128 >> backlight_compensation 0x0098091c (int) : min=0 max=1 >> step=1 default=0 value=0 >> >> Camera Controls >> >> auto_exposure 0x009a0901 (menu) : min=0 max=3 >> default=3 value=3 (Aperture Priority Mode) >> 1: Manual Mode >> 3: Aperture Priority Mode >> exposure_time_absolute 0x009a0902 (int) : min=3 max=2047 >> step=1 default=250 value=250 flags=inactive >> exposure_dynamic_framerate 0x009a0903 (bool) : default=0 value=1 >> pan_absolute 0x009a0908 (int) : min=-36000 >> max=36000 step=3600 default=0 value=0 >> tilt_absolute 0x009a0909 (int) : min=-36000 >> max=36000 step=3600 default=0 value=0 >> focus_absolute 0x009a090a (int) : min=0 max=250 >> step=5 default=0 value=0 flags=inactive >> focus_automatic_continuous 0x009a090c (bool) : default=1 value=1 >> zoom_absolute 0x009a090d (int) : min=100 max=500 >> step=1 default=100 value=100 >> led1_mode 0x0a046d05 (menu) : min=4 max=4 >> default=0 value=0 >> 4: led1_frequency 0x0a046d06 (int) >> : min=0 max=255 step=1 default=0 value=255 To be sure the issue doesn't fall through the cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression tracking bot: #regzbot ^introduced v6.1..v6.3 #regzbot title media: uvcvideo: Webcam LED control regression #regzbot ignore-activity This isn't a regression? This issue or a fix for it are already discussed somewhere else? It was fixed already? You want to clarify when the regression started to happen? Or point out I got the title or something else totally wrong? Then just reply and tell me -- ideally while also telling regzbot about it, as explained by the page listed in the footer of this mail. Developers: When fixing the issue, remember to add 'Link:' tags pointing to the report (the parent of this mail). See page linked in footer for details. Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr That page also explains what to do if mails like this annoy you.
