** Description changed: [Impact] The btrtl driver in the 5.15 jammy kernel sometimes doesn't (re-) load firmware which results in the BT adapter running potentially old firmware rather than the current version from /lib/firmware provided by the linux-firmware package. This will show in logs like so: Jul 04 14:57:23 vivo kernel: Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=dfc6 lmp_ver=0a lmp_subver=d922 Jul 04 14:57:23 vivo kernel: Bluetooth: hci0: RTL: unknown IC info, lmp subver d922, hci rev dfc6, hci ver 000a Jul 04 14:57:23 vivo kernel: Bluetooth: hci0: RTL: assuming no firmware upload needed The driver reads subver from the adapter to determine chip type. But that value is overwritten by a firmware load. In the above case, a firmware was already loaded which returns subver d922 which the driver does not recognize and it therefore won't load new firmware. [Test Case] - TBD. Not sure yet how to reliably reproduce this problem. + 1) Boot machine with USB adapter plugged in. + 2) Verify firmware is loaded. + 3) Reboot a couple of times and verify that firmware is reloaded every time. [Where Problems Could Occur] Limited to Realtek USB bluetooth adapters that use the btrtl driver. Issues could show up as Bluetooth connection/initialization problems.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2026028 Title: usbrtl sometimes doesn't reload firmware Status in linux package in Ubuntu: New Status in linux source package in Jammy: Confirmed Bug description: [Impact] The btrtl driver in the 5.15 jammy kernel sometimes doesn't (re-) load firmware which results in the BT adapter running potentially old firmware rather than the current version from /lib/firmware provided by the linux-firmware package. This will show in logs like so: Jul 04 14:57:23 vivo kernel: Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=dfc6 lmp_ver=0a lmp_subver=d922 Jul 04 14:57:23 vivo kernel: Bluetooth: hci0: RTL: unknown IC info, lmp subver d922, hci rev dfc6, hci ver 000a Jul 04 14:57:23 vivo kernel: Bluetooth: hci0: RTL: assuming no firmware upload needed The driver reads subver from the adapter to determine chip type. But that value is overwritten by a firmware load. In the above case, a firmware was already loaded which returns subver d922 which the driver does not recognize and it therefore won't load new firmware. [Test Case] 1) Boot machine with USB adapter plugged in. 2) Verify firmware is loaded. 3) Reboot a couple of times and verify that firmware is reloaded every time. [Where Problems Could Occur] Limited to Realtek USB bluetooth adapters that use the btrtl driver. Issues could show up as Bluetooth connection/initialization problems. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2026028/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
