Category: ubuntu

mdadm woes

After migrating a software RAID 5 to Ubuntu LTS 12.04, the system wouldn't come up again after rebooting. I believe Chris Siebenmann to splendidly have analysed [1] the problem: a race condition with udev losing the race. His solution is to: Change /usr/share/initramfs-tools/scripts/mdadm-functionsas follows: degraded_arrays() { + udevadm settle mdadm --misc --scan --detail --test >/dev/null … Continue reading mdadm woes

CRTL+Space not working in Ubuntu applications

For some time now content assist and the command panel have been broken in Eclipse and Ubiquity running under Ubuntu; they wouldn't trigger the pop-up menues when pressing CRTL+Space.The reason is ibus intercepting that key combination and it's just as easily solved [1]:Open gconf-editor.Choose desktop -> ibus -> general -> hotkey.Open trigger parameter.Remove Ctrl+Space key … Continue reading CRTL+Space not working in Ubuntu applications

Changing sub-pixel rendering in Ubuntu 12.04

In older Ubuntu releases one could change the sub-pixel rendering in the system settings, but that option was unfortunately removed in newer releases. Fortunately it is still accessible via gnome settings [1]:Open dconf-editorIn the left pane, go to /org/gnome/settings-daemon/plugins/xsettingsIn the right pane, change the value of the rgba-order key to bgr:or via command linegsettings set … Continue reading Changing sub-pixel rendering in Ubuntu 12.04

Reducing power consumption on the HP Probook 4720s and Ubuntu 12.04

As said earlier, Ubuntu 12.04 does a good job with power management on the 4720s. With some manual settings power consumption can be further decreases, albeit not much this time. I wrote this script which takes a parameter:on: enable power management settingsoff: disable power management settingsextra: on + enable extensive power management settings. This is … Continue reading Reducing power consumption on the HP Probook 4720s and Ubuntu 12.04