Ubuntu video thumbnails in file manager

Gnome's file manager Nautilus doesn't display video thumbnails under Ubuntu 24.04. Thankfully this solution still works: https://askubuntu.com/questions/1034595/thumbnails-not-showing-in-video-in-ubuntu-18-04 sudo apt install ffmpegthumbnailer sudo apt install gstreamer1.0-libav rm -r ~/.cache/thumbnails/fail Reboot Done!

Trim on LUKS encrypted LVM root volumes

I noticed that fstrim wasn't working on my new Ubuntu 24.04 desktop installation, failing with "fstrim: /: the discard operation is not supported". In that setup, Ubuntu is installed into an LUKS encrypted LVM volume, so the ext4 file system, LVM and LUKS need to play nicely together for flash discard to work. That's how … Continue reading Trim on LUKS encrypted LVM root volumes →

Screen overlays in Linux

I heavily customise my Linux desktop setups, which includes binding scripts to hotkeys. Occasionally a visual feedback is useful (eg. when changing the CPU frequency). I'm aware of the following ways to display some sort of overlays which I tried with Ubuntu 24.04: Notifications Notify-send notifications display as simple rectangles. notify-send "Volume" "80%" Although there … Continue reading Screen overlays in Linux →

wpa_supplicant spam

Ubuntu 24.04 is spamming several of these entries in syslog: wpa_supplicant[1736]: wlp3s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-62 noise=9999 txrate=390000 The solution is to raise the wpa_supplicant logging level and restart networking: mkdir -p /etc/systemd/system/wpa_supplicant.service.d/ vi /etc/systemd/system/wpa_supplicant.service.d/log.conf # add these lines [Service] LogLevelMax=4 # save & quit systemctl daemon-reload systemctl restart wpa_supplicant.service systemctl restart NetworkManager.service

Gedit snap menu freeze, wrong colours

When installed as a snap package in Ubuntu 24.04, Gedit displays wrong colours and some menus freeze. The solution is to disable the opengl permission. Either through Settings -> Apps -> Permissions: or on the command line: snap connect gedit:opengl