** Patch added: "btusb.c.patch" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924741/+attachment/5488885/+files/btusb.c.patch
-- 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/1924741 Title: Load Broadcom firmware for Dell Bluetooth device [413c:8197] Status in linux package in Ubuntu: Confirmed Bug description: The Broadcom Bluetooth kernel module supports loading patches for specific hardware devices. Which devices require patchram support is defined in an array of structs in the kernel module `btusb`, which allow matching by Vendor ID and, optionally, Product ID. The Dell-branded device `413c:8197` requires the patch `BCM20702A1-413c-8197.hcd`[1] to be loaded in order for HSP/HFP functionality to work (A2DP and AVRCP work without the patch). However, the patch is not sought for this device by `btusb`. In 2011, `413c:8197` was included in the module[2], but not marked as requiring patchram. Later, in 2017, a blanket entry was added for all Dell-branded (`413c`) devices[3], marking them as requiring patchram. However, the previous entry for `413c:8197` was not removed and appears to block the patchram requirement from being added for this device (presumably the algorithm stops searching after the first match). The code stands like so: ``` static const struct usb_device_id btusb_table[] = { ... /* Broadcom BCM20702A0 */ { USB_DEVICE(0x413c, 0x8197) }, ... /* Dell Computer - Broadcom based */ { USB_VENDOR_AND_INTERFACE_INFO(0x413c, 0xff, 0x01, 0x01), .driver_info = BTUSB_BCM_PATCHRAM }, ``` I would like to request removal of the earlier entry to facilitate patchram support for device `413c:8197`. I have tested this as working on my Dell Precision M6700 running Ubuntu 20.04 with kernel `5.4.0-71-generic`. [1]: https://github.com/winterheart/broadcom-bt-firmware/blob/master/brcm/BCM20702A1-413c-8197.hcd [2]: https://github.com/torvalds/linux/commit/d13431ca3eb2a2c14314f04813cdc11cd869f150 [3]: https://github.com/torvalds/linux/commit/fdfddc601713d4ed564b0bd25b29415bd622020a To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924741/+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
