*** This bug is a duplicate of bug 1867548 *** https://bugs.launchpad.net/bugs/1867548
I'm having the exact same problem on Ubuntu 20.04 and gnome-control- center version 3.36.2 with the assumed duplicate bug fixed. I follow the same steps as in the original description to exchange the Control_L key and XF86WakeUp key (Fn on German keyboards): I executed xev to discover the Control_L and XF86WakeUp keycodes: KeyRelease event, serial 37, synthetic NO, window 0x4600001, root 0x5dd, subw 0x0, time 4165720, (668,636), root:(902,854), state 0x4, keycode 37 (keysym 0xffe3, Control_L), same_screen YES, XLookupString gives 0 bytes: XFilterEvent returns: False KeyPress event, serial 37, synthetic NO, window 0x4600001, root 0x5dd, subw 0x0, time 4166218, (668,636), root:(902,854), state 0x0, keycode 151 (keysym 0x1008ff2b, XF86WakeUp), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False Then, I run $ xmodmap -e "keycode 37 = XF86WakeUp" and $ xmodmap -e "keycode 151 = Control_L" After which xev shows: KeyRelease event, serial 37, synthetic NO, window 0x3c00001, root 0x5fd, subw 0x0, time 1691367, (1390,1888), root:(1584,2066), state 0x0, keycode 151 (keysym 0xffe3, Control_L), same_screen YES, XLookupString gives 0 bytes: XFilterEvent returns: False KeyPress event, serial 37, synthetic NO, window 0x3c00001, root 0x5fd, subw 0x0, time 1692110, (1390,1888), root:(1584,2066), state 0x0, keycode 37 (keysym 0x1008ff2b, XF86WakeUp), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False Saving this to a .Xmodmap file and looking at the content correctly shows the change: $ xmodmap -pke ~./Xmodmap $ cat ~/.Xmodmap -- snip -- keycode 37 = XF86WakeUp NoSymbol XF86WakeUp keycode 151 = Control_L NoSymbol Control_L -- snip-- However, the system still treats key 37 as Control_L, and key 151 as XF86WakeUp. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to x11-xserver-utils in Ubuntu. https://bugs.launchpad.net/bugs/1872501 Title: Modifications ALT R mapping at xmodmap not taking effect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/x11-xserver-utils/+bug/1872501/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp