Comment 6 for bug 2069130

> Is this a regression?

What exactly does that mean?

> Has this worked for you in the past?

Yes, it stopped working after upgrade to 24.04 (from 23.10)... or shortly thereafter... I didn't notice until a week or two later.

If yes, which kernel was that?

The latest kernel on ubuntu 23.10, what kernel would that be?

I have now renamed the firmware file:
```
$ ls -l /lib/firmware/intel/ibt-11-5*
-rw-r--r-- 1 root root 31 maj 6 10:17 /lib/firmware/intel/ibt-11-5.ddc.zst
-rw-r--r-- 1 root root 379353 maj 6 10:17 /lib/firmware/intel/ibt-11-5.sfi.zst.BAK
```

Now it (as expected) cannot load the firmware and the the error message is different:

```
$ sudo dmesg | grep -i bluetooth
[ 5.338173] Bluetooth: Core ver 2.22
[ 5.338193] NET: Registered PF_BLUETOOTH protocol family
[ 5.338195] Bluetooth: HCI device and connection manager initialized
[ 5.338198] Bluetooth: HCI socket layer initialized
[ 5.338201] Bluetooth: L2CAP socket layer initialized
[ 5.338204] Bluetooth: SCO socket layer initialized
[ 5.413119] Bluetooth: hci0: Bootloader revision 0.0 build 2 week 52 2014
[ 5.418168] Bluetooth: hci0: Device revision is 5
[ 5.418172] Bluetooth: hci0: Secure boot is enabled
[ 5.418174] Bluetooth: hci0: OTP lock is enabled
[ 5.418176] Bluetooth: hci0: API lock is enabled
[ 5.418177] Bluetooth: hci0: Debug lock is disabled
[ 5.418179] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[ 5.418724] Bluetooth: hci0: Failed to load Intel firmware file intel/ibt-11-5.sfi (-2)
[ 5.419490] Bluetooth: hci0: Reading supported features failed (-56)
[ 5.419495] Bluetooth: hci0: Error reading debug features
[ 5.419498] Bluetooth: hci0: HCI LE Coded PHY feature bit is set, but its usage is not supported.
[ 6.756163] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 6.756170] Bluetooth: BNEP filters: protocol multicast
[ 6.756175] Bluetooth: BNEP socket layer initialized
```