readme: add tips for Linux users

Signed-off-by: leo <longshuang@msn.cn>

README.md

@@ -101,6 +101,7 @@ For **Linux** users:
 * `xdg-open` must be installed to support open native file manager.
 * Make sure [git-credential-manager](https://github.com/git-ecosystem/git-credential-manager/releases) is installed on your linux.
 * Maybe you need to set environment variable `AVALONIA_SCREEN_SCALE_FACTORS`. See https://github.com/AvaloniaUI/Avalonia/wiki/Configuring-X11-per-monitor-DPI.
+* If you can NOT type accented characters, such as `ê`, `ó`, try to set the environment variable `AVALONIA_IM_MODULE` to `none`. 
 
 ## OpenAI
 

src/Native/Linux.cs

@@ -13,7 +13,7 @@ namespace SourceGit.Native
     {
         public void SetupApp(AppBuilder builder)
         {
-            builder.With(new X11PlatformOptions());
+            builder.With(new X11PlatformOptions() { EnableIme = true });
         }
 
         public string FindGitExecutable()