Bluetooth not working anymore with Ubuntu 24?

Framework Laptop 16 Linux
1

Help! I’m running Ubuntu on my laptop:

Linux savaresefw16 6.8.0-139-generic #139-Ubuntu SMP PREEMPT_DYNAMIC Sat Aug 1 03:52:05 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux

Looks like recently something was updated and my bluetooth adaptor is no longer recognized. Google suggested a hard reset. I went further and ordered a new adaptor and installed it. Still can’t turn bluetooth on anymore.

THe device is visible in USB:

savarese@savaresefw16:~$ lsusb | grep -i media
Bus 001 Device 006: ID 0e8d:e616 MediaTek Inc. Wireless_Device
Bus 009 Device 006: ID 0d8c:0014 C-Media Electronics, Inc. Audio Adapter (Unitek Y-247A)
savarese@savaresefw16:~$ lspci | grep -i media
01:00.0 Network controller: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter
c1:00.5 Multimedia controller: Advanced Micro Devices, Inc. [AMD] ACP/ACP3X/ACP6x Audio Coprocessor (rev 63)

But for some reason bluetooth won’t start. Any thoughts?

Thanks, Scott

2

Get a terminal window open, type dmesg --follow, and then get BT to fail. Grab the failure logs in text format, and paste them here in a code block. Someone should be able to help you based on what it says.

3

It doesn’t fail like that. I can try and turn on bluetooth but dmesg doesn’t show anything. While I can see the adaptor in lsusb, its as if the bluetooth stack can’t see it. I don’t see anything in the logs with an error. Current package set:

savarese@savaresefw16:~$ dpkg -l | grep blue
ii bluez 5.72-0ubuntu5.5 amd64 Bluetooth tools and daemons
ii bluez-cups 5.72-0ubuntu5.5 amd64 Bluetooth printer driver for CUPS
ii bluez-obexd 5.72-0ubuntu5.5 amd64 bluez obex daemon
ii bluez-tools 2.0~20170911.0.7cb788c-4build2 amd64 Set of tools to manage Bluetooth devices for linux
ii gir1.2-gnomebluetooth-3.0:amd64 46.0-1ubuntu1 amd64 Introspection data for GnomeBluetooth
ii gnome-bluetooth 42~3.34.5-13build3 all GNOME Bluetooth Send To app - transitional package
ii gnome-bluetooth-3-common 46.0-1ubuntu1 all GNOME Bluetooth 3 common files
ii gnome-bluetooth-common 3.34.5-13build3 all GNOME Bluetooth common files
ii gnome-bluetooth-sendto 46.0-1ubuntu1 amd64 GNOME Bluetooth Send To app
ii libbluetooth3:amd64 5.72-0ubuntu5.5 amd64 Library to use the BlueZ Linux Bluetooth stack
ii libgnome-bluetooth-3.0-13:amd64 46.0-1ubuntu1 amd64 GNOME Bluetooth 3 support library
ii libgnome-bluetooth-ui-3.0-13:amd64 46.0-1ubuntu1 amd64 GNOME Bluetooth 3 UI support library
ii libgnome-bluetooth13t64:amd64 3.34.5-13build3 amd64 GNOME Bluetooth tools - support library
ii libqt5bluetooth5:amd64 5.15.13-1 amd64 Qt Connectivity Bluetooth module
ii libqt5bluetooth5-bin 5.15.13-1 amd64 Qt Connectivity Bluetooth module helper binaries
ii libspa-0.2-bluetooth:amd64 1.0.5-1ubuntu3.3 amd64 libraries for the PipeWire multimedia server - bluetooth plugins
savarese@savaresefw16:~$ uname -a
Linux savaresefw16 6.8.0-139-generic #139-Ubuntu SMP PREEMPT_DYNAMIC Sat Aug 1 03:52:05 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux

4

This is interesting in the dmesg logs from boot:

[ 56.963219] usbcore: registered new interface driver btusb
[ 56.971025] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20250523103438
[ 56.971034] BUG: kernel NULL pointer dereference, address: 0000000000000219
[ 56.971038] #PF: supervisor read access in kernel mode
[ 56.971040] #PF: error_code(0x0000) - not-present page
[ 56.971044] PGD 0 P4D 0
[ 56.971049] Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 56.971053] CPU: 9 PID: 170 Comm: kworker/u33:0 Not tainted 6.8.0-139-generic #139-Ubuntu
[ 56.971056] Hardware name: Framework Laptop 16 (AMD Ryzen 7040 Series)/FRANMZCP09, BIOS 04.05 06/30/2026
[ 56.971059] Workqueue: hci0 hci_power_on [bluetooth]
[ 56.971101] RIP: 0010:__pm_runtime_resume+0x1b/0x80
[ 56.971108] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 55 48 89 e5 41 56 41 55 41 54 41 89 f4 83 e6 01 53 48 89 fb 75 09 87 c9 01 00 00 04 74 4a 41 f6 c4 04 74 07 f0 ff 83 c0 01 00 00
[ 56.971111] RSP: 0018:ffffd1f740613b30 EFLAGS: 00010246
[ 56.971115] RAX: ffff8999413854d0 RBX: 0000000000000050 RCX: 0000000000000000
[ 56.971118] RDX: 0000000000000035 RSI: 0000000000000000 RDI: 0000000000000050
[ 56.971120] RBP: ffffd1f740613b50 R08: 0000000000000000 R09: 0000000000000000
[ 56.971123] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[ 56.971124] R13: 0000000000000035 R14: 000000000000003a R15: ffffd1f740613be8
[ 56.971126] FS: 0000000000000000(0000) GS:ffff89a09e680000(0000) knlGS:0000000000000000
[ 56.971129] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 56.971131] CR2: 0000000000000219 CR3: 0000000109b16000 CR4: 0000000000f50ef0
[ 56.971133] PKRU: 55555554
[ 56.971135] Call Trace:
[ 56.971138]
[ 56.971142] usb_autopm_get_interface+0x1d/0x60
[ 56.971150] btmtk_usb_hci_wmt_sync+0xa9/0x2e0 [btmtk]
[ 56.971154] ? __pfx_btmtk_usb_hci_wmt_sync+0x10/0x10 [btmtk]
[ 56.971158] btmtk_setup_firmware_79xx+0x1c7/0x360 [btmtk]
[ 56.971165] btusb_mtk_setup+0x453/0x610 [btusb]
[ 56.971172] hci_dev_setup_sync+0x6c/0x430 [bluetooth]
[ 56.971208] ? __pm_runtime_idle+0x4c/0xd0
[ 56.971213] hci_dev_init_sync+0x3e/0x1c0 [bluetooth]
[ 56.971244] hci_dev_open_sync+0xb1/0x350 [bluetooth]
[ 56.971276] ? srso_alias_return_thunk+0x5/0xfbef5
[ 56.971282] hci_dev_do_open+0x28/0x70 [bluetooth]
[ 56.971315] hci_power_on+0x50/0x210 [bluetooth]
[ 56.971347] ? srso_alias_return_thunk+0x5/0xfbef5
[ 56.971350] ? __try_to_del_timer_sync+0x5f/0xa0
[ 56.971355] process_one_work+0x181/0x3a0
[ 56.971360] worker_thread+0x18b/0x330
[ 56.971364] ? __pfx_worker_thread+0x10/0x10
[ 56.971367] kthread+0xef/0x120
[ 56.971371] ? __pfx_kthread+0x10/0x10
[ 56.971374] ret_from_fork+0x44/0x70
[ 56.971379] ? __pfx_kthread+0x10/0x10

[ 56.971382] ret_from_fork_asm+0x1b/0x30
[ 56.971389]

5

There appears to be a bug introduced between 6.8.0-138 and 6.8.0-139. When I boot back into 138, bluetooth works.

1 Like
6

Quick tip - logs are more readably formatted using a code block:

[ 56.963219] usbcore: registered new interface driver btusb
[ 56.971025] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20250523103438
[ 56.971034] BUG: kernel NULL pointer dereference, address: 0000000000000219
[ 56.971038] #PF: supervisor read access in kernel mode
[ 56.971040] #PF: error_code(0x0000) - not-present page
[ 56.971044] PGD 0 P4D 0
[ 56.971049] Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 56.971053] CPU: 9 PID: 170 Comm: kworker/u33:0 Not tainted 6.8.0-139-generic #139-Ubuntu

There’s a little </> icon in the toolbar for this purpose :slightly_smiling_face:

7

As per ChatGPT, this has already been reported to Ubuntu: