I just switched back to Ubuntu mate after about 2 years. Unfortunately alt+tab is not working for my left alt (with the right alt is fine) when I'm using my external keyboard (Razer Ornata Chroma). Also, the alt+` is working just fine with both alts. Tried to rebind, unsuccessfully, tried to update keyboard driver/firmware but i'm not sure I did it correctly. I'm assuming its keyboard problem but still...any ideas how to fix it ?
with my "internal" (laptop) keyboard:
KeyPress event, ... root 0x50a, subw 0x0, time 9051384, (593,207), root:(595,316), state 0x10, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES, FocusOut event, ... mode NotifyGrab, detail NotifyAncestor
FocusOut event, ... mode NotifyWhileGrabbed, detail NotifyNonlinear
PropertyNotify event, ... atom 0x15b (_NET_WM_STATE), time 9051568, state PropertyNewValue
with my external i have only "key press/ key release" events. Its like pressing alt is blocking the tab button
Update - Fixed:
After the initial install of OpenRazer and configuring Polychromatic, I have removed the OpenRazer and that fixed the problem.