https://bugs.kde.org/show_bug.cgi?id=449036
Bug ID: 449036
Summary: Displayed name of a Bluetooth device's battery is an
HID name, not the alias which you can set in
preferences
Product: plasmashell
Version: master
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Battery Monitor
Assignee: plasma-b...@kde.org
Reporter: m...@ratijas.tk
CC: k...@privat.broulik.de, m...@ratijas.tk
Target Milestone: 1.0
Created attachment 145820
--> https://bugs.kde.org/attachment.cgi?id=145820&action=edit
KDE Bluetooth - apple magic keyboard's names
SUMMARY
Either this product/component or it should go into
powerdevil/frameworks-solid/bluedevil.
Apple Magic Keyboard is a Bluetooth-only device, and after pairing with a Linux
system (either desktop or Android) it can be renamed in system/Bluetooth
settings. Such renaming apparently only affects the operating system; while the
device continues to identify itself as before (in my case it's supposedly the
name of its previous owner -- I got a second-hand keyboard after all). It is
said[1] that it can only be truly renamed from an OS X system, which I
currently don't have at my disposal.
Both names may be visible on screen at the same time e.g. if you expand the
list item in a Bluetooth applet, or just request info from `bluetoothctl`:
❯ bluetoothctl info 90:**:**:**:**:CD
Device 90:**:**:**:**:CD (public)
Name: denis - клавиатура
Alias: tragic keyboard
Class: 0x00002540
Icon: input-keyboard
Paired: yes
Trusted: yes
Blocked: no
Connected: yes
WakeAllowed: yes
LegacyPairing: no
UUID: Human Interface Device... (00001124-0000-1000-8000-00805f9b34fb)
UUID: PnP Information (00001200-0000-1000-8000-00805f9b34fb)
Modalias: usb:v05ACp0239d0050
The problem is that «Battery and Brightness» applet always displays the "Name"
field, not a given "Alias". In the "powermanagement" Plasma data engine there
are three naming fields per battery:
- Vendor
- Product
- Pretty Name
For instance, my laptop's battery is represented as
> { Vendor: "ASUSTeK", Product: "ASUS Battery", "Pretty Name": "Battery" }
but the poor tragic keyboard has both Product and Pretty Name equal to the same
"device's remote name", even without vendor:
> { Vendor: <empty>, Product: "denis - клавиатура", "Pretty Name": "denis -
> клавиатура" }
On a closer look into kernel objects at /sys/bus/usb/devices/... it seems that
the name is coming from HID_NAME in uevent data. Vendor data could've been
extracted from HID_ID (like USB VID), but it's just not happening. AFAICT
there's no API to directly tell HID device to change its name, which is
probably why the system is resorting to "local" aliases.
STEPS TO REPRODUCE
1. Pair Appleⓡ Magic Keyboard™ with your system.
2. Rename it in System Settings.
3. Open up «Battery and Brightness» applet.
OBSERVED RESULT
You are seeing the "old" name, the HID name of a device.
EXPECTED RESULT
Since a proper renaming of this keyboard is not possible anywhere except on OS
X, I'd at least expected to see an alias name in the applet.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.24.80
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.2
Kernel Version: 5.16.2-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 970M/PCIe/SSE2
bluez: 5.63-1
bluedevil: 1:5.23.5-1
ADDITIONAL INFORMATION
[1]: https://discussions.apple.com/thread/250109852
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