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July 11, 2026
- Finally looking at my XPS Linux-partition again.
- Connected the XPS with an ethernet cable.
- Used the Ubuntu recovery mode, enabled network and entered as root.
- Did an sudo apt update, followed by sudo apt upgrade. 69 packages were upgraded, including the mesa-vulkan drivers. Saw no nvidia-upgrades. Saw an error: dm.service is not active, cannot reload.
- Did a reboot, and regular Ubuntu 24.04 works again, even on three screens.
- Only get an error error connecting to /tmp/tmux-1000/default. That was an experimental line in my .bashrc, commented it out; error gone.
- There are 7 packages hold back. One of them is libspdlog1, which as side-effect removes many ros-humble packages. Are ros-humble and Ubuntu 24.04 a combination? According to ROS 2 Jazzy is a good choice, although rolling should be the latest version independent choice.
- Only ROS-noetic is installed on the XPS workstation.
- All hold-back packages are working again.
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- Looking if Francisco 's ROS2 book simulation-code works better with Rolling-branch (or Jazzy, 11 commits ahead, 26 commits behind rolling). The book recommends Jazzy, so will try this first.
March 29, 2026
- Also used the GRUB_DEFAULT=saved trick on the XPS.
- Updating the installed packages failed because I didn't had an internet connection.
- Connecting via the wifi with iwconfig failed because of the spaces in the essid. Should have got a cable or connect via my phone.
March 16, 2026
- Cleaned up some disk-space from ws9. Started with Disk Usage Analyzer, and removed some big downloads.
- Also applied 5 tricks to free up space.
- Cleaning up the cache was not smart, because 6++ packages had to be upgraded. Could better have cleaned up the cache after upgrading.
February 24, 2026
- Used for nb-dual the GRUB_DEFAULT=saved;GRUB_SAVEDEFAULT=true from Computer Techniek 2026/3, p. 139.
January 31, 2026
- Looking at the issue that no external HDMI-monitor can be found on HP Omen.
- Followed these data-science doc. nvidia-driver-590-open was recommended. Command sudo ubuntu-drivers autoinstall installed 28 nvidia-packages. Note that I first specified in the Preferences that as alternative driver nvidia-driver-590-open was the best choice (and rebooted after changing this setting).
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