Sometimes a process is taking a lot of CPU time and it isn’t clear what the cause is. For example, at times it is common to see the kworker process consuming a lot of CPU. kworker is a placeholder process for kernel worker threads. These threads perform most of the…
Ubuntu: Installing/fixing TP-Link AC1200 (T4UH 1.0) drivers in Ubuntu
[Updated instructions for Ubuntu 20.04 here] I have had this USB wireless adapter working fine on Ubuntu 18.04 LTS for a while. A system update stopped it from working. Re-installing the OS provided drivers (Software & Updates / Additional Drivers) made no difference. I tested the adapter in other operating…
Ubuntu: Fixing the “error: no video mode activated” message on boot
During boot of your system and just after the BIOS messages Ubuntu might display a black screen with an error: no video mode activated message. The system boots normally but it is annoying. GRUB by default hides the boot menu and this message can show up if there is no…
AMD/Gigabyte: Enable hardware acceleration for virtualisation in the BIOS
In the Gigabyte BIOS you need to activate a series of settings on different sections in order for KVM to be able to use hardware acceleration. M.I.T. -> Advanced Frequency Settings -> Advanced CPU Core Settings -> SVM Mode set to Enable Chipset -> IOMMU set to Enabled Save settings…
Ubuntu: Fixing network interfaces not showing in GUI on Ubuntu Server
Ubuntu Server and Ubuntu Desktop use different network managers. Ubuntu Server uses networkd which doesn’t have a GUI component. So after adding a desktop to Ubuntu Server you won’t be able to see or change the configuration via the GUI by default. Ubuntu Desktop Ubuntu Server Configuration tool netplan netplan…