After upgrading to 2:21.1.3-2, I can't use my alternative keymap
anymore. xkbcomp returns this error:
X Error of failed request: BadValue (integer parameter out of range for operation)
Major opcode of failed request: 135 (XKEYBOARD)
Minor opcode of failed request: 9 (XkbSetMap)
Value in failed request: 0x1571001c
Serial number of failed request: 124
Current serial number in output stream: 130
Downgrading to 2:1.20.14-1 fixes the issue.
This seems to be this issue reported upsteam:
https://gitlab.freedesktop.org/xorg/xserver/-/issues/1249
and fixed in https://gitlab.freedesktop.org/xorg/xserver/-/commit/be16bd8543f80ad2933ec9c37f082617c7084165