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Ubuntu 21.04 uses Wayland as its default display server, not Xorg. Xorg-specific configuration and tweak tools (which xkbcomp is) will not work on Wayland.

As a temporary measure, I would recommend to just not use Wayland until it's ready and has a considerable user base. Without an active user base, there is always way too many bugs and no one to fix them.

To switch to Xorg:

1. Log out.

2. Click on your profile.

3. On the bottom right corner a display server selection button will appear. Click on it and select Ubuntu on Xorg.

   

4. Now log back in and everything should work.

UPDATE Solution is here: Fix CAps LOck delay in Ubuntu 21.04

UPDATE Solution is here: Fix CAps LOck delay in Ubuntu 21.04

Ubuntu 21.04 uses Wayland as its default display server, not Xorg. Xorg-specific configuration and tweak tools (which xkbcomp is) will not work on Wayland.

As a temporary measure, I would recommend to just not use Wayland until it's ready and has a considerable user base. Without an active user base, there is always way too many bugs and no one to fix them.

To switch to Xorg:

1. Log out.

2. Click on your profile.

3. On the bottom right corner a display server selection button will appear. Click on it and select Ubuntu on Xorg.

   

4. Now log back in and everything should work.

Ubuntu 21.04 uses Wayland as its default display server, not Xorg. Xorg-specific configuration and tweak tools (which xkbcomp is) will not work on Wayland.

As a temporary measure, I would recommend to just not use Wayland until it's ready and has a considerable user base. Without an active user base, there is always way too many bugs and no one to fix them.

To switch to Xorg:

1. Log out.

2. Click on your profile.

3. On the bottom right corner a display server selection button will appear. Click on it and select Ubuntu on Xorg.

   

4. Now log back in and everything should work.

Ubuntu 21.04 uses Wayland as its default display server, not Xorg. Xorg-specific configuration and tweak tools (which xkbcomp is) will not work on Wayland.

As a temporary measure, I would recommend to just not use Wayland until it's ready and has a considerable user base. Without an active user base, there is always way too many bugs and no one to fix them.

To switch to Xorg:

1. Log out.

2. Click on your profile.

3. On the bottom right corner a display server selection button will appear. Click on it and select Ubuntu on Xorg.

   

4. Now log back in and everything should work.

UPDATE Solution is here: Fix CAps LOck delay in Ubuntu 21.04

Ubuntu 21.04 uses Wayland as its default display server, not Xorg. Xorg specific configuration and tweak tools (which xkbcomp is) will not work on Wayland.

As a temporary measure I would recommend to just not use Wayland until its ready and has considerable user base, without active user base there is always way too many bugs and no one to fix them.

To switch to Xorg Log out, click on your Profile. In the bottom right corner display server choice button will appear, click on it and choose Xorg. Now Log in and everything should work.

Display server choice

Ubuntu 21.04 uses Wayland as its default display server, not Xorg. Xorg-specific configuration and tweak tools (which xkbcomp is) will not work on Wayland.

As a temporary measure, I would recommend to just not use Wayland until it's ready and has a considerable user base. Without an active user base, there is always way too many bugs and no one to fix them.

To switch to Xorg:

1. Log out.

2. Click on your profile.

3. On the bottom right corner a display server selection button will appear. Click on it and select Ubuntu on Xorg.

   

4. Now log back in and everything should work.