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bugfixes.md

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Solutions to some problems faced on Ubuntu

Category 1: Display & Graphics

  • Sympton 1: The Gnome Desktop does not render background images correctly. The image does not stretch the full length of the display. Also, multi-colored macro-blocks appear on the screen.
    • Solution: Open the terminal and run sudo gsettings set org.gnome.settings-daemon.plugins.background active true
  • Sympton 2: Desktop icons are not shown on the desktop and right-clicking on the desktop has no effect.
    • Solution: sudo gsettings set org.gnome.desktop.background show-desktop-icons true
  • Symptom 3: Display freezes and only option is to perform a hard shutdown.
    • Solution: Modify and Update grub. DO THIS ONLY IF YOU FACE ISSUES WITH THE DISPLAY FREEZING[1]
    • sudo nano /etc/default/grub
    • Modify the line GRUB_CMDLINE_LINUX_DEFAULT = "quiet splash intel_idle.max_cstate=1"
    • sudo update-grub
    • sudo reboot
    • REASON: This is to prevent the screen from freezing after a few minutes of inactivity. This problem was faced multiple times during installation and the computer had to be hard rebooted in order to recover. This seems to be a major bug in the display driver affecting multiple users of 15.10 & 16.04. Ubuntu is working to resolve it.
  • Symptom 4: Suspend/Hibernate on Lid close [1] [2]
    • Solution :
    • gksu gedit /etc/systemd/logind.conf
    • Uncomment (Remove '#') the line HandleLidSwitch=suspend and change it to HandleLidSwitch=ignore
    • Uncomment the line HandleLidSwitchDocked=ignore.
    • Save, exit and reboot.
    • REASON: On some machines, the computer suspends on closing the lid. This is inspite of changing the settings in 'System Settings -> Power -> 'Do nothing when lid is closed'. Found this work around to be useful when using multiple displays through a docking station. The systems suspends soon after boot-up by detecting that the lid is closed, before it detects the secondary displays.

Category 2: Networking

  • Sympton 1: Wireless adapter does not get enabled on boot-up. This occured after computer wakes from syspend mode or when it is improperly restarted. Toggling the hardware radio switch has no effect.
    • rfkill unblock all OR
    • gksu gedit /var/lib/NetworkManager/Networkmanager.state and change all settings to true OR
    • Check BIOS. Although rare, BIOS settings can prevent Wi-Fi adapter from starting up.