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I upgraded Ubuntu to 17.10 and found out that alt key has strange behavior.
If I press Alt+Space, for example, I can see the menu of the active window, but If I press more complicated combination like Ctrl+Shift+Alt+some_letter, it doesn't react. In Ubuntu 17.04 it worked.

The only way of solving this problem I know is to use gnome-tweak-tool. In this gnome-tweak-tool, I can swap key Win (Super) with key Alt. In this case everything works great, but... I would like key Win to be key Win and key Alt to be key Alt. So, may be there is a good solution for this problem?

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Some people use Caps lock for changing the input language. Possibly, using Caps lock is better workaround then that I mentioned in my question (one key instead of two), but it is still not the best solution – hijack Oct 28 '17 at 5:29
up vote 2 down vote

I was able to solve this problem using the patch from this ticket: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1683383 But the latest supported version is 1.19.3 while actual is 1.19.5 so this also requires some changes in patch/shell script to work.

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up vote 1 down vote

there's an simple workaround here:

In case you don't need to switch between keyboard layouts, you can get some shortcuts working again if you use the "Tweaks" tool for Gnome.

sudo apt install gnome-tweak-tool

Then

  1. Open "Tweaks"
  2. Select the tab "Keyboard & Mouse"
  3. Click "Additional Layout Options"
  4. Disable entries in the "Switching to another layout" dialog

In my case this gave me back the "ALT + SHIFT" combinations which are essential in the Eclipse IDE for refactoring.

It works beautifully!

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