Thanks for the info Daniel Vieira. I've posted a +100 bounty on a [second StackOverflow][1] question that would help __refine__ the patch for potential upstreaming down the line.
Fingers crossed, since I do not (yet) have the kernel and C expertise to make a more elaborate patch on my own. Though, I am starting my first college programming semester soon with books and lessons, so I should have more ability to tackle this at a later note. Still, the earlier, the better. [1]: https://stackoverflow.com/questions/79716236/how-to-exclude-a- usb-adapter-vendor-and-product-id-from-a-linux-hci-command -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2076407 Title: Title: Bluetooth 5.4 Adapter (Ugreen CM749) Not Functioning on Ubuntu 20.04 with Kernel 6.x Description: The Bluetooth 5.4 adapter Ugreen CM749 is not functioning on Ubuntu 20.04 with Kernel 6.x. The adapter is detected by the system but fails to initialize, showing a "Connection timed out (110)" error when attempting to bring up the interface. The Bluetooth 5.0 dongle works without issues on the same system. Steps to Reproduce: 1. Plugged in the Ugreen CM749 Bluetooth 5.4 adapter. 2. Ran `hciconfig hci0 up` to bring up the Bluetooth interface. 3. Observed the error "Connection timed out (110)" in the terminal. 4. Checked the dmesg logs and found repeated Bluetooth errors. Expected Behavior: The Bluetooth 5.4 adapter should initialize correctly, allowing for Bluetooth functionality such as pairing and connecting devices. Actual Behavior: The Bluetooth 5.4 adapter fails to initialize, with the interface staying down and connection attempts timing out. Additional Information: - Kernel Version: 6.10.2-061002-generic - Ubuntu Version: 20.04 - Hardware Information: *-network:1 description: Bluetooth device product: Realtek Bluetooth Adapter vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: usb@1:1 version: 1.00 - dmesg Output: [12345.6789] Bluetooth: hci0: Opcode 0x1005 failed: -110 - hciconfig Output: hci0: Type: Primary Bus: USB BD Address: 00:A7:45:28:00:B3 ACL MTU: 0:0 SCO MTU: 0:0 DOWN RX bytes:171 acl:0 sco:0 events:10 errors:0 TX bytes:276 acl:0 sco:0 commands:11 errors:0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2076407/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
