Kubuntu 20.04 - WiFi randomly disconnects after pairing BT Mouse (5.0)

[kev1807]

Hi there,

I am a Kubuntu-user for more than one year now and am currently living at my parents place, as my flat mates were quarantined when I was on vacation.
When I return to my place, I plan to ditch Windows and go full-time Kubuntu user (gaming worked fine last I tried and citavi, the only thing keeping me at windows for my PhD, has a web version now! )

my problem is the following:
I have a no-name BT Multi-device Mouse (with dongle, BT3, and BT5) that I had connected via BT3 to my Lenovo L14 1.Gen from last year, specs follow later.
I connected it via BT5, just for figuring out what the differences were but BT5 wasn't working properly, BT-connection cut off and lagged a lot, so I switched back to BT3.
However, what else I realised: After connecting it via BT5 to the computer, I started experiencing seemingly random WiFi disconnects, which I, at first, attributed to poor WiFi-connection in the room, so I changed location and went directly to the router. As I was sitting 30cms away from the router, the disconnects didn't stop. So I changed WiFi-channels, etc. - To no avail.

Now I have my multi-device Mouse connected via BT3 and random WiFi-connection losses.
If any of you know a fix for the BT5-lag issue and the WiFi-connection losses I'd happily try them out. The priority, clearly, is the WiFi-issue, since I am working from here, for another 2-3 weeks and conference calls really suck when you are reconnecting your WiFi every n seconds...

I am a user more or less, so I didn't make any kernel changes. I just sudo apt update && sudo apt upgrade regularly and play around with themes, when I am procrastinating my work :-D


some hopefully useful outputs:
Operating System: Kubuntu 20.04
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
Kernel Version: 5.11.0-41-generic
OS Type: 64-bit
Processors: 8 × Intel® Core™ i5-10210U CPU @ 1.60GHz
Memory: 14,9 GiB
----
Mouse (output from hwinfo):
60: PS/2 00.0: 10500 PS/2 Mouse
[Created at input.249]
Unique ID: AH6Q.juaFC+9948B
Hardware Class: mouse
Model: "BT3.0 Mouse"
Vendor: 0xae24
Device: 0x8618 "BT3.0 Mouse"
Compatible to: int 0x0210 0x0025
Device File: /dev/input/mice (/dev/input/mouse2)
Device Files: /dev/input/mice, /dev/input/mouse2, /dev/input/event20
Device Number: char 13:63 (char 13:34)
Driver Info #0:
Buttons: 5
Wheels: 2
XFree86 Protocol: explorerps/2
GPM Protocol: exps2
Config Status: cfg=new, avail=yes, need=no, active=unknown
----
WiFi Controller (output from hwinfo):
34: PCI 400.0: 0282 WLAN controller
[Created at pci.386]
Unique ID: YVtp.mxT2IIe1w3C
Parent ID: vayM.iBLgXo5Z0g4
SysFS ID: /devices/pci0000:00/0000:00:1d.1/0000:04:00.0
SysFS BusID: 0000:04:00.0
Hardware Class: network
Model: "Intel WLAN controller"
Vendor: pci 0x8086 "Intel Corporation"
Device: pci 0x2723
SubVendor: pci 0x8086 "Intel Corporation"
SubDevice: pci 0x0080
Revision: 0x1a
Driver: "iwlwifi"
Driver Modules: "iwlwifi"
Device File: wlp4s0
Features: WLAN
Memory Range: 0xd1300000-0xd1303fff (rw,non-prefetchable)
IRQ: 17 (no events)
HW Address: 74:d8:3e:24:45:73
Permanent HW Address: 74:d8:3e:24:45:73
Link detected: yes
WLAN channels: 1 2 3 4 5 6 7 8 9 10 11 12 13 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140
WLAN frequencies: 2.412 2.417 2.422 2.427 2.432 2.437 2.442 2.447 2.452 2.457 2.462 2.467 2.472 5.18 5.2 5.22 5.24 5.26
5.28 5.3 5.32 5.5 5.52 5.54 5.56 5.58 5.6 5.62 5.64 5.66 5.68 5.7
WLAN encryption modes: WEP40 WEP104 TKIP CCMP
WLAN authentication modes: open sharedkey wpa-psk wpa-eap
Module Alias: "pci:v00008086d00002723sv00008086sd00000080bc0 2sc8 0i00"
Driver Info #0:
Driver Status: iwlwifi is active
Driver Activation Cmd: "modprobe iwlwifi"
Config Status: cfg=new, avail=yes, need=no, active=unknown
Attached to: #19 (PCI bridge)
----
Bluetooth Controller (output via hwinfo):
03: USB 00.0: 11500 Bluetooth Device
[Created at usb.122]
Unique ID: fHJ1.qmlouffvxgF
Parent ID: k4bc.2DFUsyrieMD
SysFS ID: /devices/pci0000:00/0000:00:14.0/usb1/1-10/1-10:1.0
SysFS BusID: 1-10:1.0
Hardware Class: bluetooth
Model: "Intel Bluetooth Device"
Hotplug: USB
Vendor: usb 0x8087 "Intel Corp."
Device: usb 0x0029
Revision: "0.01"
Driver: "btusb"
Driver Modules: "btusb"
Speed: 12 Mbps
Module Alias: "usb:v8087p0029d0001dcE0dsc01dp01icE0isc01ip01 in00 "
Driver Info #0:
Driver Status: btusb is active
Driver Activation Cmd: "modprobe btusb"
Config Status: cfg=new, avail=yes, need=no, active=unknown
Attached to: #8 (Hub)





Can anyone help me fix this?
It's rather annoying :-D
If u need any more information, just ask for it and I will try to supply it to you,

all the best,
Kevin

[claydoh]

How are you "switching" from Bluetooth 3.0 to Bluetooth 5.0? Though this is likely unrelated.
Have you tried making sure your wifi is connected using 5ghz instead of 2.4 (interference between Bt and 2,4 wifi)? Rebooted, toggled the wifi off and on via the keyboard function keys\ (NOT the tray applet)?

[kev1807]

Hi, Thanks for your reply :-)

The mouse has a hardware switch and I paired both BT3.0 and BT5.0.
I think the WiFi-router here doesn't support 5Ghz It's a really old TP-Link.

But it kinda seems working for now. The Laptop was hybernating for 6 hours ...