Category Archives: Hardware

Linux: connect Bluetooth headset with bluetoothctl and Blueman

2 February 2021

 Recently, I bought a Sony WH-1000XM3 headset. In general, they are great but need to connect them to my laptop with Arch Linux. The documentation about Bluetooth on Arch Linux can be found here>>> and here>>>: Installation Install necessary packages: Check kernel’s module: If it’s not found – load it: Start the service: bluetoothctl Linux… Read More »

Redis: fork – Cannot allocate memory, Linux, virtual memory and vm.overcommit_memory

28 August 2019

 Currently, I’m configuring a Redis as a caching service for our application and during that, I faced with the question: do I need to set vm.overcommit_memory to the value 1, i.e. disable it – or not? The question is quite old for me, see The story, but only now I found time to get to… Read More »

Linux: LVM – pvcreate Device /dev/sdb4 excluded by a filter.

9 March 2019

 During new Linux set up – suddenly got a weird message. It happen just because of my carelessness and haste. Let’s create new partition: Check new partition size: sdb4 8:20 0 1K 0 part – Er… What? Okay – the simplest solution is just to drop it and re-create: 442.2G – looks good? Check again… Read More »

Linux: ALSA lib pcm_dmix.c:1108:(snd_pcm_dmix_open) unable to open slave

28 February 2019

 Have a fresh Arch Linux system setup. After some Viber’s fixes (see the Viber: no connection – Incompatible version of OpenSSL post) – sound system sometimes stops working. It looks like next: run qmmp, press Play and: The solution Check audio-devices and drivers: Create the /etc/modprobe.d/default.conf file: options snd_hda_intel index=1 And reboot system. Then check audio… Read More »

Arch Linux: installing with EFI and Windows dual-boot

24 February 2019

 The goal is to set up a new Arch Linux and Windows (just for some games) on my new PC and use dual-boot using GRUB. Disks Currently disks layout is next: /dev/sda – SSD, will be for Windows /dev/sdb – HDD, for Arch Linux On /dev/sdb have to create next partitions: sdb1 – EFI, 512,… Read More »