drivers – Trekstor laptop bluetooth adapter not working in Kubuntu 21.04

I’m using Kubuntu 21.04 on a Trekstor SurfBook W2 laptop and the bluetooth is not working. I think the adapter is not even detected correctly. Not 100% sure but it might be a Broadcom Wifi/Bluetooth adapter. The wifi works fine.

uname -mr; lsb_release -d; 
5.11.0-25-generic x86_64
Description:    Ubuntu 21.04
00:00.0 Host bridge: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series SoC Transaction Register (rev 22)
00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller (rev 22)
00:03.0 Multimedia controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Imaging Unit (rev 22)
00:0b.0 Signal processing controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Power Management Controller (rev 22)
00:14.0 USB controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series USB xHCI Controller (rev 22)
00:1a.0 Encryption controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Series Trusted Execution Engine (rev 22)
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 1018:1006  
Bus 001 Device 005: ID 058f:5608 Alcor Micro Corp. USB 2.0 Camera
Bus 001 Device 003: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 Device 002: ID 046d:c52f Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
rfkill list
0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
hciconfig -a
hci0:   Type: Primary  Bus: UART
        BD Address: AA:AA:AA:AA:AA:AA  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING 
        RX bytes:2200 acl:0 sco:0 events:116 errors:0
        TX bytes:5730 acl:0 sco:0 commands:115 errors:0
        Features: 0xbf 0xfe 0xcf 0xfe 0xdb 0xff 0x7b 0x87
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 
        Link policy: RSWITCH SNIFF 
        Link mode: SLAVE ACCEPT 
        Name: 'alouestdeden-SurfBook-W2'
        Class: 0x3c010c
        Service Classes: Rendering, Capturing, Object Transfer, Audio
        Device Class: Computer, Laptop
        HCI Version: 4.1 (0x7)  Revision: 0x0
        LMP Version: 4.1 (0x7)  Subversion: 0x2122
        Manufacturer: Broadcom Corporation (15)
sudo dmesg | grep Blue
(    8.610985) Bluetooth: Core ver 2.22
(    8.611077) Bluetooth: HCI device and connection manager initialized
(    8.611088) Bluetooth: HCI socket layer initialized
(    8.611094) Bluetooth: L2CAP socket layer initialized
(    8.611106) Bluetooth: SCO socket layer initialized
(    8.825846) Bluetooth: HCI UART driver ver 2.3
(    8.825862) Bluetooth: HCI UART protocol H4 registered
(    8.825866) Bluetooth: HCI UART protocol BCSP registered
(    8.825929) Bluetooth: HCI UART protocol LL registered
(    8.825934) Bluetooth: HCI UART protocol ATH3K registered
(    8.826008) Bluetooth: HCI UART protocol Three-wire (H5) registered
(    8.859750) Bluetooth: HCI UART protocol Intel registered
(    8.859985) Bluetooth: HCI UART protocol Broadcom registered
(    8.860013) Bluetooth: HCI UART protocol QCA registered
(    8.860018) Bluetooth: HCI UART protocol AG6XX registered
(    8.860042) Bluetooth: HCI UART protocol Marvell registered
(    9.115179) Bluetooth: hci0: BCM: failed to write clock (-56)
(    9.115204) Bluetooth: hci0: Failed to set baudrate
(    9.231108) Bluetooth: hci0: BCM: chip id 94
(    9.235191) Bluetooth: hci0: BCM: features 0x2e
(    9.259648) Bluetooth: hci0: 4343A0
(    9.259667) Bluetooth: hci0: BCM4343A0 (001.001.034) build 0000
(    9.259835) Bluetooth: hci0: BCM: firmware Patch file not found, tried:
(    9.259845) Bluetooth: hci0: BCM: 'brcm/BCM4343A0.hcd'
(    9.259850) Bluetooth: hci0: BCM: 'brcm/BCM.hcd'
(   12.300439) Bluetooth: BNEP (Ethernet Emulation) ver 1.3
(   12.300452) Bluetooth: BNEP filters: protocol multicast
(   12.300465) Bluetooth: BNEP socket layer initialized
(   17.321873) Bluetooth: RFCOMM TTY layer initialized
(   17.321903) Bluetooth: RFCOMM socket layer initialized
(   17.321924) Bluetooth: RFCOMM ver 1.11
dpkg -l | grep blue
ii  bluedevil                                     4:5.22.4-0ubuntu1~ubuntu21.04~ppa1                                   amd64        KDE Bluetooth stack
ii  bluetooth                                     5.56-0ubuntu4.2                                                      all          Bluetooth support
ii  bluez                                         5.56-0ubuntu4.2                                                      amd64        Bluetooth tools and daemons
ii  bluez-cups                                    5.56-0ubuntu4.2                                                      amd64        Bluetooth printer driver for CUPS
ii  bluez-obexd                                   5.56-0ubuntu4.2                                                      amd64        bluez obex daemon
ii  bluez-tools                                   2.0~20170911.0.7cb788c-4                                             amd64        Set of tools to manage Bluetooth devices for linux
ii  libbluetooth3:amd64                           5.56-0ubuntu4.2                                                      amd64        Library to use the BlueZ Linux Bluetooth stack
ii  libkf5bluezqt-data                            5.84.0-0ubuntu1~ubuntu21.04~ppa1                                     all          data files for bluez-qt
ii  libkf5bluezqt6:amd64                          5.84.0-0ubuntu1~ubuntu21.04~ppa1                                     amd64        Qt wrapper for bluez
ii  pulseaudio-module-bluetooth                   1:14.2-1ubuntu1.1                                                    amd64        Bluetooth module for PulseAudio sound server
ii  qml-module-org-kde-bluezqt:amd64              5.84.0-0ubuntu1~ubuntu21.04~ppa1                                     amd64        QML wrapper for bluez

I’ve upgraded bluez package to latest (latest i could without compiling with GIT because of dependencies problems).
I’ll try to extract the probable Broadcom’s firmware from Windows’s driver like a answer on a bug report says, but not sure i’ve got the skills to do it.

So any help is more than welcome 🙂

kubuntu – KDE Plasma 5 Text Box Border Hightlight Not In Correct Position

I recently added Manjaro to my setup that already had Kubuntu 21.04 and Windows 10. Kubuntu and Manjaro are sharing the /home partition, so I’m using the same user account on both systems. Everything is fine until I log into Kubuntu, and noticed that the border around textboxes in places like the lock screen (not the logon screen) and the search box in the application menu look very strange. This takes place only in the Breeze and Breeze Dark Plasma styles, which makes sense, but I’m not sure how to fix this.

disk utility – How to safely recover my High Sierra GUID partition that has become FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF after deleting Kubuntu partition?

I got a 2011 mac mini with High Sierra on it few years ago and installed bootcamp, then 10.7, then linux (kubuntu). After running out of space in high sierra and windows, I decided to delete the linux partition and expanded the 10.7 partition. Now it will only boot into windows or 10.7 by holding option key, HS doesn’t show up in boot manager.

My questions are: Can I fix this from where I’m now, booted into 10.7 (Lion)? Or do I have to go into its recovery mode?
It boots into Lion recovery, not high Sierra recovery, and I’m not able to make a HS boot disk because the app store requires me to have 10.8 to download it, but I don’t want to upgrade due to several audio unit plugins that will become incompatible and I’ve just read a lot of bad things about mountain lion.

If it can be fixed using ubuntu, I would assume it could be done from 10.7, I just was afraid it would screw up because 10.7 doesn’t know what APFS is.

My other option is to follow instructions on how to fix it via the Ubuntu live environment,

This is my partition layout:

diskutil list
0: GUID_partition_scheme *500.1 GB disk0
1: EFI 209.7 MB disk0s1
3: Microsoft Basic Data BOOTCAMP 100.3 GB disk0s3
4: Apple_HFS Legacy 249.4 GB disk0s4

sudo gpt -r show disk0 Password: gpt show: disk0: Suspicious MBR at sector 0 start size index contents 0 1 MBR 1 1 Pri GPT header 2 32 Pri GPT table 34 6 40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B 409640 292968736 2 GPT part - FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF 293378376 1720 293380096 195991552 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 489371648 1696 489373344 487137640 4 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 976510984 262151 976773135 32 Sec GPT table 976773167 1 Sec GPT header

Why does it say “Suspicious MBR at sector 0”??

sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 60801/255/63 (976773168 sectors)
Signature: 0xAA55
Starting Ending
#: id cyl hd sec – cyl hd sec ( start – size)

1: EE 1023 254 63 – 1023 254 63 ( 1 – 409639)
2: DA 1023 254 63 – 1023 254 63 ( 409640 – 292968736)
*3: 0C 1023 254 63 – 1023 254 63 ( 293380096 – 195991552) Win95 FAT32L
4: AF 1023 254 63 – 1023 254 63 ( 489373344 – 487137640) HFS+

Disk utility screenshot

I understand this may be perceived as a duplicate but I am unsure of some instructions on other posts, as my mac OS High Sierra is on Disk0s2, and I don’t want to mess it up.

kubuntu – Numlock always ON

I want Numlock to be always ON in Kubuntu, right from the login screen until shutdown, and then with every restart. The instructions available on various websites explain the steps in a manner that may be easy for an expert! I am only a standard computer user and want simple instructions to achieve this “feat” in Kubuntu. Most instructions refer to Dash. What is Dash and how to start Dash in Kubuntu? I could not locate the Dash even after searching every nook & corner of the software (Kubuntu) installed on my PC!
Can someone please provide a simple set of instructions to get Numlock on (forever) in Kubuntu on my PC? The option to turn on numlock under keyboard settings somehow refuses to work, no matter what!

Kubuntu Vauly wont open and i can access pictures that are precious to me…can anyone help? Also i cant connect to internet,,not even woth LAN wire

So I transfered a bunch of photos and videos to my new vault. And now I can’t open vault. Also no wifi or LAN cable access to 9nternet…..what’s going on? These pictures are precious to me. I choose Linux for secure and open-source. I didn’t know I could get locked out of my own photo. Anyone please help?

dual boot – After installing Kubuntu, grub shows a black screen and doesn’t detect Windows dualboot

Prior to installing Kubuntu I had a Ubuntu and Widnows10 dualboot.

Since I installed Kubuntu in place of the Ubuntu I noticed that grub didn’t show up and the new OS would boot automatically. After opening grub customizer I see that the Boot default entry was set after 0 seconds. Changed that to 4 seconds in hopes it would show up. Now it shows a black screen for 4 seconds after proceeding to boot Kubuntu (which would be its first item on its list).

Here’s the other issue. Nowhere in grub customizer’s boot list do I see Windows, BIOS does not see it as a bootable either.

lsblk outputs:

sda      8:0    0 119,2G  0 disk 
├─sda1   8:1    0  47,7G  0 part /
├─sda2   8:2    0   7,6G  0 part (SWAP)
├─sda3   8:3    0    33M  0 part /boot/efi
└─sda4   8:4    0  63,9G  0 part /home
sdb      8:16   0 931,5G  0 disk 
├─sdb1   8:17   0   931G  0 part 
└─sdb2   8:18   0   529M  0 part

sdb is where windows is stored, specifically sdb2 should have been bootable. I don’t know much around this and I would greatly appreciate any help/explanation. Thank you in advance.

After updating grub I still get the same output.

Dropbox is not syncing anymore after upgrade to Kubuntu 20.04

I upgraded from Kubuntu 18.04 to 20.04. Now the Dropbox icon keeps switching between “network folder” and “box with circular arrows” as if a lot were going up and down, but actually nothing is coming down or going up (I’m comparing with the files on the web interface and my phone with Dropbox).

Advanced reinstall of Dropbox (with deleting configuration files) has not helped. Installing the deb file from the Dropbox website instead of from the Ubuntu repository has not helped, either.

Stopping Dropbox, deleting/moving all local files, then waiting 20 hours to download all files again worked once – now I’m back at the previous stage, edits/new files don’t go up, new photos that have uploaded from my phone to the cloud are not coming down, the icon keeps blinking.

Any ideas? Any logs I could look at to narrow this down?

kubuntu – Ethernet RX very slow, TX is fine

Just yesterday I installed Kubuntu 21.04 on my new Thinkpad. I quickly realized the download speed while using ethernet is unbearably slow. reports <1Mbps down and ~5Mbps up (upload is about right for my internet connection). The download speed is fine on Windows on the same laptop. Wifi also works great.

From what I could find on, it might have to do with the link duplex/speed, and a few times after changing it the speed would be fine, but quickly dropped again.

I’ve also disabled IPv6 as suggested in a few threads.

Any thoughts on what could cause a slow download, but not upload?

boot – Kubuntu frozen on loading screen

Whenever I boot my computer, I get past the Dell screen. Then, the black Kubuntu loading screen blinks slowly for usually around 3 seconds. After that, it just freezes. I can still use Ctrl+Alt+Del, and it still shuts down. The only thing that let’s me get in my computer is going into the Grub menu and booting into recovery mode. After that, I have to press “Resume Boot” and somehow THAT works, but not just turning it on.

kubuntu – Fan 0 RPM, hardware or software error?

I have a new computer and after approx. two weeks I noticed the unit heating up and the fan no longer on. I have checked and despite the heat, it is always at 0 RPM. I was unable to find any fan options in the BIOS.

Is there an easy way to check if this is a hardware or software fault?

Many thanks!

My system:
Kubuntu 21.04
Lenovo Thinkpad L13 Yoga 2nd Gen