Fix AMD GPU firmware installation by adding non-free repositories

- Add non-free-firmware repository for Debian (Bookworm/Trixie/Sid)
- Add multiverse repository support for Ubuntu
- Install firmware-amd-graphics for all AMD GPUs (not just APUs)
- Improve error handling with warning messages
- Support both Debian and Ubuntu systems

Fixes #10177

misc/tools.func

@@ -2734,7 +2734,7 @@ EOF
       return 1
     }
 
-    # For AMD GPUs, firmware-amd-graphics is needed but requires non-free repositories
+    # For AMD GPUs, firmware-amd-graphics requires non-free repositories
     if [[ "$os_id" == "debian" ]]; then
       # Add non-free-firmware repository if not already present
       if [[ ! -f /etc/apt/sources.list.d/non-free-firmware.sources ]]; then
@@ -2766,13 +2766,24 @@ EOF
         $STD apt update
       fi
 
-      # Now install AMD firmware and libdrm
+      # Install AMD firmware and libdrm
+      $STD apt -y install libdrm-amdgpu1 firmware-amd-graphics 2>/dev/null || {
+        msg_warn "Failed to install AMD firmware - may need manual installation"
+      }
+    elif [[ "$os_id" == "ubuntu" ]]; then
+      # For Ubuntu, ensure multiverse is enabled (firmware-amd-graphics is in multiverse)
+      if ! grep -qE '^deb.*multiverse' /etc/apt/sources.list /etc/apt/sources.list.d/*.list 2>/dev/null; then
+        $STD add-apt-repository -y multiverse
+        $STD apt update
+      fi
+      
+      # Install AMD firmware and libdrm
       $STD apt -y install libdrm-amdgpu1 firmware-amd-graphics 2>/dev/null || {
         msg_warn "Failed to install AMD firmware - may need manual installation"
       }
     else
-      # For non-Debian (Ubuntu, etc), try to install without adding repos
-      $STD apt -y install libdrm-amdgpu1 firmware-amd-graphics 2>/dev/null || true
+      # For other distributions, try without adding repositories
+      $STD apt -y install libdrm-amdgpu1 2>/dev/null || true
     fi
     ;;