This is still broken on -30, too:
```
shepherd-dev@shepherd-26:~$ uname -a
Linux shepherd-26.04 7.0.0-30-generic #30-Ubuntu SMP PREEMPT_DYNAMIC Fri Jul 31
18:22:54 UTC 2026 x86_64 GNU/Linux
shepherd-dev@shepherd-26:~$ H=$(ls /sys/class/bluetooth | head -1); sudo btmgmt
--index $H add-adv -c 1; bluetoothctl advertise peripheral; sudo btmgmt --index
$H rm-adv 1
Instance added: 1
AdvertisementMonitor path registered
Failed to register advertisement: org.bluez.Error.Failed
Instance removed: 1
```
```
shepherd-dev@shepherd-26:~$ sudo btmon
Bluetooth monitor ver 5.85
btmon[13667]: = Note: Linux version 7.0.0-30-generic (x86_64)
0.806056
btmon[13667]: = Note: Bluetooth subsystem version 2.22
0.806057
= New Index: 8C:68:8B:41:02:DC (Primary,USB,hci2)
[hci2] 0.806058
= Open Index: 8C:68:8B:41:02:DC
[hci2] 0.806058
= Index Info: 8C:68:8B:41:02:DC (Realtek Semiconductor Corporation)
[hci2] 0.806059
...
bluetoothd[1307]: @ MGMT Command: Add Extended Advertising Data (0x0055) plen
14 {0x0001} [hci2] 4.874699
Instance: 1
Advertising data length: 3
Flags: 0x06
LE General Discoverable Mode
BR/EDR Not Supported
Scan response length: 0
@ MGMT Event: Command Status (0x0002) plen 3
{0x0001} [hci2] 4.874703
Add Extended Advertising Data (0x0055)
Status: Invalid Parameters (0x0d)
bluetoothd[1307]: = src/advertising.c:add_client_complete() Failed to add
advertisement: Invalid Parameters (0x0d) 4.874758
```
Again, this completely breaks usage of an Ubuntu 26.04 device as a BLE
GATT peripheral.
Is there a plan to fix this in 7.0.0, or have Ubuntu 26.04 use a newer
kernel that is not affected?
My understanding is that the following contains the patch that resolves
the issue: https://lore.kernel.org/linux-
bluetooth/[email protected]/T/#u
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https://bugs.launchpad.net/bugs/2161852
Title:
linux 7.0.0-28: BLE LE advertising fails — MGMT "Add Extended
Advertising Data" returns Invalid Parameters (0x0d) [regression from
7.0.0-27]
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