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#2076407 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
linux (Ubuntu) 6
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39013943 of 3943 results

"linux" versions published in Ubuntu

Oracular-proposed (6.11.0-6.6): main/devel
Noble-security (6.8.0-41.41): main/devel
Jammy-security (5.15.0-119.129): main/devel
Focal-security (5.4.0-193.213): main/devel
Noble-updates (6.8.0-41.41): main/devel
Jammy-updates (5.15.0-119.129): main/devel
Focal-updates (5.4.0-193.213): main/devel
Noble-proposed (6.8.0-44.44): main/devel
Jammy-proposed (5.15.0-121.131): main/devel
Focal-proposed (5.4.0-195.215): main/devel
Oracular (6.8.0-31.31): main/devel
Noble (6.8.0-31.31): main/devel
Bionic-security (4.15.0-213.224): main/devel
Bionic-updates (4.15.0-213.224): main/devel
Jammy (5.15.0-25.25): main/devel
Xenial-security (4.4.0-210.242): main/devel
Xenial-updates (4.4.0-210.242): main/devel
Focal (5.4.0-26.30): main/devel
Trusty-security (3.13.0-170.220): main/devel
Trusty-updates (3.13.0-170.220): main/devel
Bionic (4.15.0-20.21): main/devel
Xenial (4.4.0-21.37): main/devel
Trusty (3.13.0-24.46): main/devel