https://bugzilla.kernel.org/show_bug.cgi?id=213967 Bug ID: 213967 Summary: Thinkpad T14 Chicony Webcam not recognized by kernel Product: Drivers Version: 2.5 Kernel Version: 5.13.6 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: USB Assignee: drivers_usb@xxxxxxxxxxxxxxxxxxxxxx Reporter: dev@xxxxxxxxxxxxxx Regression: No Distro: Arch Linux Timeline: - after upgrading from 5.12.15 to 5.13.4, my webcam wasn't being recognized by the kernel (nothing showing up in the kernel logs regarding uvcvideo and nothing showing up in lsusb) - a temporary fix (as determined by the distro community) was to install the firmware from this repository (https://github.com/denisandroid/uPD72020x-Firmware) while waiting for the official fix - the potential fix was issued (commit 44cf53602f5a0db80d53c8fff6cdbcae59650a42) and merged in 5.13.6 - after upgrading to 5.13.6 my webcam stopped working yet again. Suspecting that I no longer needed the uPD72020x-Firmware, I uninstalled it, with no success. My webcam is still not being recognized Right now I'm running 5.13.5 with uPD72020x-Firmware installed, which is the only working solution for now. Kernel logs: ``` kernel: usb 2-2: new high-speed USB device number 2 using xhci_hcd kernel: usb 2-2: New USB device found, idVendor=04f2, idProduct=b6d0, bcdDevice=58.18 kernel: usb 2-2: New USB device strings: Mfr=3, Product=1, SerialNumber=2 kernel: usb 2-2: Product: Integrated Camera kernel: usb 2-2: Manufacturer: Chicony Electronics Co.,Ltd. kernel: usb 2-2: SerialNumber: 0001 kernel: usb 2-2: Found UVC 1.10 device Integrated Camera (04f2:b6d0) kernel: input: Integrated Camera: Integrated C as /devices/pci0000:00/0000:00:02.7/0000:06:00.0/usb2/2-2/2-2:1.0/input/input30 kernel: usbcore: registered new interface driver btusb kernel: usb 2-2: Found UVC 1.50 device Integrated Camera (04f2:b6d0) kernel: input: Integrated Camera: Integrated I as /devices/pci0000:00/0000:00:02.7/0000:06:00.0/usb2/2-2/2-2:1.2/input/input31 kernel: usbcore: registered new interface driver uvcvideo ``` lsusb: ``` Bus 007 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 006 Device 003: ID 8087:0029 Intel Corp. AX200 Bluetooth Bus 006 Device 002: ID 06cb:00bd Synaptics, Inc. Prometheus MIS Touch Fingerprint Reader Bus 006 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 004: ID 05e3:0749 Genesys Logic, Inc. SD Card Reader and Writer Bus 005 Device 005: ID 2109:0812 VIA Labs, Inc. VL812 Hub Bus 005 Device 006: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153 Gigabit Ethernet Adapter Bus 005 Device 003: ID 0bda:0411 Realtek Semiconductor Corp. Hub Bus 005 Device 002: ID 2109:0817 VIA Labs, Inc. USB3.0 Hub Bus 005 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 004 Device 003: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader Bus 004 Device 007: ID 046d:c52b Logitech, Inc. Unifying Receiver Bus 004 Device 008: ID 24f0:0140 Metadot Das Keyboard 4 Bus 004 Device 006: ID 2109:2812 VIA Labs, Inc. VL812 Hub Bus 004 Device 005: ID 0bda:5411 Realtek Semiconductor Corp. RTS5411 Hub Bus 004 Device 004: ID 2109:0102 VIA Labs, Inc. USB 2.0 BILLBOARD Bus 004 Device 002: ID 2109:2817 VIA Labs, Inc. USB2.0 Hub Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 002: ID 04f2:b6d0 Chicony Electronics Co., Ltd Integrated Camera Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub ``` I have tried grepping the kernel logs for the pci bridge in the working and non-working versions Working: ``` kernel: pci 0000:00:02.7: [1022:1634] type 01 class 0x060400 kernel: pci 0000:00:02.7: PME# supported from D0 D3hot D3cold kernel: pci 0000:00:02.7: PCI bridge to [bus 06] kernel: pci 0000:00:02.7: bridge window [mem 0xfd400000-0xfd4fffff] kernel: pci 0000:00:02.7: PCI bridge to [bus 06] kernel: pci 0000:00:02.7: bridge window [mem 0xfd400000-0xfd4fffff] kernel: pci 0000:00:02.7: Adding to iommu group 7 kernel: pcieport 0000:00:02.7: PME: Signaling with IRQ 31 kernel: input: Integrated Camera: Integrated C as /devices/pci0000:00/0000:00:02.7/0000:06:00.0/usb2/2-2/2-2:1.0/input/input30 kernel: input: Integrated Camera: Integrated I as /devices/pci0000:00/0000:00:02.7/0000:06:00.0/usb2/2-2/2-2:1.2/input/input31 ``` Not working: ``` kernel: pci 0000:00:02.7: [1022:1634] type 01 class 0x060400 kernel: pci 0000:00:02.7: PME# supported from D0 D3hot D3cold kernel: pci 0000:00:02.7: PCI bridge to [bus 06] kernel: pci 0000:00:02.7: bridge window [mem 0xfd400000-0xfd4fffff] kernel: pci 0000:00:02.7: PCI bridge to [bus 06] kernel: pci 0000:00:02.7: bridge window [mem 0xfd400000-0xfd4fffff] kernel: pci 0000:00:02.7: Adding to iommu group 7 kernel: pcieport 0000:00:02.7: PME: Signaling with IRQ 31 ``` -- You may reply to this email to add a comment. 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