I have the same basic problem. Same USB device ID was working "not long ago", but now fails. One (perhaps very significant) difference. My system is Ubuntu 18.04, and the kernel seems to be a 4.15 variant. uname -a gives:
Linux OptiPlex-9020 4.15.0-118-generic #119-Ubuntu SMP Tue Sep 8 12:30:01 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux Does this suggest it's a driver or similar supporting piece of code, rather than the kernel? Or perhaps it's a kernel patch that was included in older versions too? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1894424 Title: CONFIG_EFI_CUSTOM_SSDT_OVERLAYS causes HDMI video capture device to fail [534d:2109] (no /dev/video{0,1}) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.4/+bug/1894424/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
