Precise known bugs with workarounds

[CharlesA]

Please post the bugs you have run into and how you worked around them here.

Do not post your problems, please raise a support thread.

Keep in mind, that Linux is infinitely customizable, you do not have to stick with Unity as a desktop environment if you do not want to.

[haqking]

I have posted a workaround thread to the default dnsmasq being hardcoded into networkmanager in 12.04 which leaves users potentially vulnerable to MITM attacks and DNS poisoning especially on open networks where rogue DNS servers could appear.

Thread/workaround here http://ubuntuforums.org/showthread.php?t=1968061

It is not needed as a default configuration, it should be provided as a feature if needed.

Though it appears no caching is happening by default, however instructions above are there if needed.

Peace

[mendhak]

Sometimes LightDM (the login screen) won't let you log in. This might happen if you have set a non-default wallpaper. The login screen will simply say "logging in" and get stuck there. To get around it,

1. Ctrl Alt F1, login
2. Run these commands:
   
   

       sudo apt-get install gdm
       sudo dpkg-reconfigure gdm

3. That installs GDM, and you will need to set it as default in the second command.
4. Reboot
5. Login, set a standard wallpaper (right click desktop)
6. Run this command to set lightdm back
   

   sudo dpkg-reconfigure lightdm

7. Reboot

If that doesn't work and you still get stuck, do a Ctrl+Alt+F1 at the login screen and have a look at the following log files to see what's happening.

sudo less /var/log/lightdm/x-0-greeter.log
sudo less /var/log/lightdm/lightdm.log

[Zukaro]

Default Ubuntu wallpapers will also become the login screen wallpaper (if used as your desktop wallpaper). This is a feature, however, it doesn't work with custom wallpapers (which is a bug). If you're using your own wallpaper it wont appear on the login screen; the way to fix this is to copy it into /usr/share/backgrounds and then set the permissions to read only (set "group" and "other" permissions to read only).

You wont be able to drag the file to the folder as the folder is owned by root, so type "sudo mv /home/username/Pictures/wallpaper.jpg /usr/share/backgrounds" (make sure there's a space between locations); then go to the directory, find the file, right click, go into permissions and change group and other to read only (you're still the owner of the file, which is why you don't need to change permissions through the terminal).

Then to use the wallpaper just select it as your desktop wallpaper and it will also become your login screen wallpaper.

If you want your login screen wallpaper different from your desktop wallpaper download Ubuntu Tweak Tool and follow all the same steps above with the image you want to use instead; then just choose that image in Ubuntu Tweak Tool.




I found out about this bug and the fact the permissions were the issue here:
https://bugs.launchpad.net/ubuntu-tweak/+bug/888186

[Yathi]

I believe adobe flashed has been renamed in Precise Pangolin. So you need to install:

sudo apt-get install adobe-flashplugin

instead of the usual

sudo apt-get install flashplugin-nonfree

[philinux]

If you have ambiance as your theme and you right click the desktop, for example, you'll see a light menu rather than dark like Oneiric.

The discussion surrounding this "design decision" is here.

Bug Report 925895

The fix if you want it is here.

Theme fix for Precise

[Lamukra]

If you have ambiance as your theme and you right click the desktop, for example, you'll see a light menu rather than dark like Oneiric.

The discussion surrounding this "design decision" is here.

Bug Report 925895

The fix if you want it is here.

Theme fix for Precise

Have you tried to run nautilus with root privileges and see what happens. With me nautilus was behaving very strangely - changing color of window with almost every click ... or it is normal? Can you try it?

[merlinus]

Did not work for me. Same light-colored menus and such as with plain old Ambiance theme. I am using Gnome Classic.

Also, the theme only showed up in the Advanced Settings tool, not System Settings/Appearance.

If you have ambiance as your theme and you right click the desktop, for example, you'll see a light menu rather than dark like Oneiric.

The discussion surrounding this "design decision" is here.

Bug Report 925895

The fix if you want it is here.

Theme fix for Precise

[whatthefunk]

Crap Nvidia driver included on .iso. Solution is to remove any proprietary drivers and then revert to old Nvidia driver.

sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
 sudo apt-get update
 sudo apt-get install nvidia-current=295.33-0ubuntu1~precise~xup1

Reboot and you should be good to go.

[codingman]

Can anybody back me up on how to fix the ALT-TAB bug in Gnome Classic? Or is this a bug that is in progress of being fixed? I'm not using Gnome Classic until this bug is fixed.