[Notion-general] Mod1 key

[Richard L. <rle...@ya...>]

Recently I install NOTion on debian amd64. When switching between different workspace with Mod1 + 1, Mod1 + 2, etc. (as described in documentation http://notion.sourceforge.net/notionkeys.html), it doesn't work. Checking xmodmap, output shows similar to 

    mod1        Alt_L (0x40),  Alt_R (0x6c),  Meta_L (0xcd)


Is there any way to check if some setting may occupy the current key binding (e.g. alt + 2)?

I appreciate any suggestion.

Thanks