Hi,

In v1.6.0 after I connect using Guacamole to a Linux Server (CentOS 7, Rocky Linux 9), Polish characters do not work.
When connecting from Windows directly (using mstsc.exe) or Linux (freerdp), everything is working fine.

I spent a few days changing Guacamole settings, the keymap in Linux, and changing the configuration in /etc/xrdp - no results. In general, AltGR does not work (Even if Keyboard layout in connection properties was set to Polish (Qwerty))
I reverted the Docker image from 1.6.0 to v1.5.4, and everything is working correctly!

I have checked commits. The issue is.

GUACAMOLE-1473: Disable AltGr handling for RDP keyboard layouts that don't support it.

1f14982

As you can see, the map +ext 0x38 ~ 0xfe03 # AltGr has been removed from base.keymap‎ and added to base_altgr.keymap‎.
Mostly keymap lang files have been replaced from parent "base" to parent "base_altgr".

File pl_pl_qwerty.keymap was not touched! So AltGr (ąćęłńśóźż) does not work!

I have downloaded the latest guacd from the git, added changes, run docker build, and replaced the image. Now everything is working as expected. I can use ąćęłńśóźż. Please replace base to base_altgr in pl_pl_qwerty.keymap file.

  diff --git a/src/protocols/rdp/keymaps/pl_pl_qwerty.keymap b/src/protocols/rdp/keymaps/pl_pl_qwerty.keymap
  index 76b043d0..86f63282 100644
  --- a/src/protocols/rdp/keymaps/pl_pl_qwerty.keymap
  +++ b/src/protocols/rdp/keymaps/pl_pl_qwerty.keymap
  @@ -17,7 +17,7 @@
   # under the License.
   #

  -parent  "base"
  +parent  "base_altgr"
   name    "pl-pl-qwerty"
   freerdp "KBD_POLISH_PROGRAMMERS"