[BUG] Built-in Microdia 0c45:636a webcam fails to initialise (uvcvideo probe error -5)

[galpt]

Pre-flight checklist

• I have searched existing issues and this is not a duplicate.
• I have read the Contributing Guidelines.
• I have verified the issue is reproducible with the latest available CachyOS kernel.

Upstream / vanilla kernel check

I was unable to test with a vanilla/upstream kernel

Kernel variant

linux-cachyos (EEVDF, Clang)

System information (cachyos-bugreport.sh)

https://paste.cachyos.org/p/d0025b4.log

Manual system information (if cachyos-bugreport.sh is unavailable)

Bug description

Laptop: Lenovo IdeaPad Gaming 3 15ARH7 running CachyOS
(Arch‑based) with linux-cachyos 6.19.6-2-cachyos kernel.

Built‑in Microdia USB 2.0 Camera (vendor/product 0c45:636a) never appears in
userspace. uvcvideo driver aborts during probe:

uvcvideo 1-3:1.0: Found UVC 1.00 device USB 2.0 Camera (0c45:636a)
uvcvideo 1-3:1.0: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
uvcvideo 1-3:1.1: Failed to query (GET_CUR) UVC probe control : -32 (exp. 26).
uvcvideo 1-3:1.1: Failed to initialize the device (-5).
uvcvideo 1-3:1.0: probe with driver uvcvideo failed with error -5

lsusb shows the device; no /dev/video* node is ever created. Adding any
quirks= parameter has no effect. The earlier helper-generated
options uvcvideo quirks=0x80:0x636a line is syntactically invalid and ignored.

This makes the internal webcam unusable; only a virtual camera (akvcam) or
external USB webcam can be used instead.

Steps to reproduce

1. Boot CachyOS on the affected machine (IdeaPad Gaming 3 15ARH7).
2. Run lsusb – expect to see Bus … ID 0c45:636a Microdia USB 2.0 Camera.
3. Check kernel log (dmesg) or manually load the driver:

sudo modprobe uvcvideo
sudo dmesg | grep -i uvc

4. Observe messages shown above (probe failure with GET_CUR error -32).
5. Optionally, attempt to reload with various quirks= values; behaviour
   remains unchanged.

Expected behavior

The built-in Microdia webcam (0c45:636a) should be recognised by the
uvcvideo driver, /dev/video0 (or similar) created, and applications such as
cheese should be able to access the video stream without manual quirks
enabled. The driver should probe the device successfully instead of
failing with a GET_CUR error.

Actual behavior

When the laptop boots the Microdia camera is detected on the USB bus but
uvcvideo aborts during probe with these messages:

uvcvideo 1-3:1.0: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
uvcvideo 1-3:1.1: Failed to query (GET_CUR) UVC probe control : -32 (exp. 26).
uvcvideo 1-3:1.1: Failed to initialize the device (-5).
probe with driver uvcvideo failed with error -5

No /dev/video* node appears, so the camera cannot be opened. Trying
quirks= module parameters has no effect; the previously added
options uvcvideo quirks=0x80:0x636a line is invalid and ignored.

Logs / stack traces

Relevant kernel logs and USB descriptor information:


$ lsusb | grep -i uvc
Bus 001 Device 002: ID 0c45:636a Microdia USB 2.0 Camera

$ sudo dmesg | grep -i uvc
[    7.397954] uvcvideo: `0x80:0x636a' invalid for parameter `quirks'
[ 22212.734728] uvcvideo 1-3:1.0: Found UVC 1.00 device USB 2.0 Camera (0c45:636a)
[ 22212.734740] uvcvideo 1-3:1.0: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
[ 22212.762393] uvcvideo 1-3:1.1: Failed to query (GET_CUR) UVC probe control : -32 (exp. 26).
[ 22212.762397] uvcvideo 1-3:1.1: Failed to initialize the device (-5).
[ 22212.762434] uvcvideo 1-3:1.0: probe with driver uvcvideo failed with error -5


No `/dev/video*` nodes are created because the probe aborts before exposing a
streaming interface.

Additional system information

galpt@galpt-laptop 
------------------ 
OS: CachyOS x86_64 
Host: LENOVO LNVNB161216 
Kernel: 6.19.6-2-cachyos 
Uptime: 6 hours, 57 mins 
Packages: 1400 (pacman) 
Shell: fish 4.5.0 
Resolution: 1920x1080 
DE: Plasma 6.6.2 (Wayland) 
WM: kwin_wayland_wr 
Theme: Breeze-Dark [GTK2], Breeze [GTK3] 
Icons: breeze-dark [GTK2/3] 
Terminal: vscode 
CPU: AMD Ryzen 7 6800H with Radeon Graphics (16) @ 4.787GHz 
GPU: NVIDIA GeForce RTX 3050 Mobile 
GPU: AMD ATI Radeon 680M 
Memory: 7497MiB / 59947MiB 

[JanAbrJou]

I have exactly the same issue. been struggling for a while. The same on Manjaro, and I dual-boot Windows, and the camera does not work there as well. ID 0c45:6720 Microdia Integrated_Webcam_HD

[1Naim]

This is an upstream kernel issue, right?

[galpt]

Sorry I couldn't test upstream kernel so I'm not sure either. If someone could confirm it, feel free to close this issue. For now, I'll leave it open.

[1Naim]

Sorry I couldn't test upstream kernel so I'm not sure either

Is there a reason why if I may ask?

[galpt]

Sorry I couldn't test upstream kernel so I'm not sure either

Is there a reason why if I may ask?

I couldn't get the right time to do it at the time of writing this issue.
I think can do that now, I'm currently installing 6.19.10.arch1-1 and will report back ASAP.

[galpt]

I'm posting this comment from 6.19.10-arch1-1, and webcam works great.

           .-------------------------:                    galpt@galpt-laptop
          .+=========================.                    ------------------
         :++===++==================-       :++-           OS: CachyOS x86_64
        :*++====+++++=============-        .==:           Host: 82SB (IdeaPad Gaming 3 15ARH7)
       -*+++=====+***++==========:                        Kernel: Linux 6.19.10-arch1-1
      =*++++========------------:                         Uptime: 2 mins
     =*+++++=====-                     ...                Packages: 1510 (pacman)
   .+*+++++=-===:                    .=+++=:              Shell: fish 4.5.0
  :++++=====-==:                     -*****+              Display (LEN9059): 1920x1080 @ 1.25x in 16", 120 Hz [Built-in]
 :++========-=.                      .=+**+.              DE: KDE Plasma 6.6.3
.+==========-.                          .                 WM: KWin (Wayland)
 :+++++++====-                                .--==-.     WM Theme: Breeze
  :++==========.                             :+++++++:    Theme: Breeze (Dark) [Qt], Breeze-Dark [GTK2], Breeze [GTK3]
   .-===========.                            =*****+*+    Icons: breeze-dark [Qt], breeze-dark [GTK2/3/4]
    .-===========:                           .+*****+:    Font: Noto Sans (10pt) [Qt], Noto Sans (10pt) [GTK2/3/4]
      -=======++++:::::::::::::::::::::::::-:  .---:      Cursor: breeze (24px)
       :======++++====+++******************=.             Terminal: konsole 25.12.3
        :=====+++==========++++++++++++++*-               CPU: AMD Ryzen 7 6800H (16) @ 4.79 GHz
         .====++==============++++++++++*-                GPU 1: NVIDIA GeForce RTX 3050 Mobile [Discrete]
          .===+==================+++++++:                 GPU 2: AMD Radeon 680M [Integrated]
           .-=======================+++:                  Memory: 5.53 GiB / 58.54 GiB (9%)
             ..........................                   Swap: 0 B / 58.54 GiB (0%)
                                                          Disk (/): 137.75 GiB / 472.61 GiB (29%) - xfs
                                                          Disk (/intel-drive): 108.42 GiB / 472.61 GiB (23%) - xfs
                                                          Local IP (wlan0): 10.0.10.147/8
                                                          Battery (PABAS0241231): 100% [AC Connected]
                                                          Locale: en_US.UTF-8

                                                                                  
                                                                                  
~
❯ lsusb | grep -i microdia

~
❯ sudo dmesg | grep -iE 'uvc|video|0c45'
[sudo] password for galpt: 
[    1.484594] ACPI: video: Video Device [VGA] (multi-head: yes  rom: no  post: no)
[    1.485088] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:17/LNXVIDEO:00/input/input9
[    8.210765] videodev: Linux video capture interface: v2.00
[    8.435775] uvcvideo 1-3:1.0: Found UVC 1.00 device Integrated Camera (13d3:56ff)
[    8.452968] usbcore: registered new interface driver uvcvideo

~
❯ journalctl -k -b | grep -iE 'uvc|video|0c45'
Mar 31 11:54:57 archlinux kernel: ACPI: video: Video Device [VGA] (multi-head: yes  rom: no  post: no)
Mar 31 11:54:57 archlinux kernel: input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:17/LNXVIDEO:00/input/input9
Mar 31 11:55:03 galpt-laptop kernel: videodev: Linux video capture interface: v2.00
Mar 31 11:55:04 galpt-laptop kernel: uvcvideo 1-3:1.0: Found UVC 1.00 device Integrated Camera (13d3:56ff)
Mar 31 11:55:04 galpt-laptop kernel: usbcore: registered new interface driver uvcvideo

~
❯ 

I'll switch back to cachy and check if webcam works or not and will report back.

[galpt]

Switched back to 6.19.10-1-cachyos, and webcam works too.

           .-------------------------:                    galpt@galpt-laptop
          .+=========================.                    ------------------
         :++===++==================-       :++-           OS: CachyOS x86_64
        :*++====+++++=============-        .==:           Host: 82SB (IdeaPad Gaming 3 15ARH7)
       -*+++=====+***++==========:                        Kernel: Linux 6.19.10-1-cachyos
      =*++++========------------:                         Uptime: 43 seconds
     =*+++++=====-                     ...                Packages: 1510 (pacman)
   .+*+++++=-===:                    .=+++=:              Shell: fish 4.5.0
  :++++=====-==:                     -*****+              Display (LEN9059): 1920x1080 @ 1.25x in 16", 120 Hz [Built-in]
 :++========-=.                      .=+**+.              DE: KDE Plasma 6.6.3
.+==========-.                          .                 WM: KWin (Wayland)
 :+++++++====-                                .--==-.     WM Theme: Breeze
  :++==========.                             :+++++++:    Theme: Breeze (Dark) [Qt], Breeze-Dark [GTK2], Breeze [GTK3]
   .-===========.                            =*****+*+    Icons: breeze-dark [Qt], breeze-dark [GTK2/3/4]
    .-===========:                           .+*****+:    Font: Noto Sans (10pt) [Qt], Noto Sans (10pt) [GTK2/3/4]
      -=======++++:::::::::::::::::::::::::-:  .---:      Cursor: breeze (24px)
       :======++++====+++******************=.             Terminal: konsole 25.12.3
        :=====+++==========++++++++++++++*-               CPU: AMD Ryzen 7 6800H (16) @ 4.79 GHz
         .====++==============++++++++++*-                GPU 1: NVIDIA GeForce RTX 3050 Mobile [Discrete]
          .===+==================+++++++:                 GPU 2: AMD Radeon 680M [Integrated]
           .-=======================+++:                  Memory: 5.90 GiB / 58.54 GiB (10%)
             ..........................                   Swap: 3.19 MiB / 58.54 GiB (0%)
                                                          Disk (/): 137.62 GiB / 472.61 GiB (29%) - xfs
                                                          Disk (/intel-drive): 108.42 GiB / 472.61 GiB (23%) - xfs
                                                          Local IP (wlan0): 10.0.10.147/8
                                                          Battery (PABAS0241231): 100% [AC Connected]
                                                          Locale: en_US.UTF-8

                                                                                  
                                                                                  
~
❯ lsusb | grep -i microdia

~
❯ sudo dmesg | grep -iE 'uvc|video|0c45'
[sudo] password for galpt: 
[    1.456439] ACPI: video: Video Device [VGA] (multi-head: yes  rom: no  post: no)
[    1.456938] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:17/LNXVIDEO:00/input/input9
[    8.716254] videodev: Linux video capture interface: v2.00
[    8.925977] uvcvideo 1-3:1.0: Found UVC 1.00 device Integrated Camera (13d3:56ff)
[    8.943135] usbcore: registered new interface driver uvcvideo

~
❯ journalctl -k -b | grep -iE 'uvc|video|0c45'
Mar 31 12:01:27 cachyos kernel: ACPI: video: Video Device [VGA] (multi-head: yes  rom: no  post: no)
Mar 31 12:01:27 cachyos kernel: input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:17/LNXVIDEO:00/input/input9
Mar 31 12:01:34 galpt-laptop kernel: videodev: Linux video capture interface: v2.00
Mar 31 12:01:34 galpt-laptop kernel: uvcvideo 1-3:1.0: Found UVC 1.00 device Integrated Camera (13d3:56ff)
Mar 31 12:01:34 galpt-laptop kernel: usbcore: registered new interface driver uvcvideo

~
❯ 

I couldn't reproduce this issue. Since it's solved now, I'll close this issue. Thanks!