.AdvancedSettings2.DisableCtrlAltDel = 1 is not working ?

[fuqifacai]

xrdp version

0.9.20

Detailed xrdp version, build options

Paste the result between `~~~`.  Please DO NOT remove `~~~`!

Operating system & version

Debian12

Installation method

dnf / apt / zypper / pkg / etc

Which backend do you use?

Xvnc

What desktop environment do you use?

GNOME

Environment xrdp running on

Physical machine

What's your client?

WPF Sample codes on windows 10 x64 bit

Area(s) with issue?

No response

Steps to reproduce

I wrote a WPF rdp client to connect xrdp server by using MS's RDP COM component.
below are core codes:
rdpClient.ColorDepth = 32;

        rdpClient.AdvancedSettings2.HotKeyCtrlAltDel = 0;
        rdpClient.AdvancedSettings2.HotKeyFullScreen = 0;
        rdpClient.ColorDepth = 32;
        rdpClient.AdvancedSettings2.PerformanceFlags = 128;

        rdpClient.AdvancedSettings7.EnableCredSspSupport = true;
        rdpClient.AdvancedSettings2.SmartSizing = true;
        rdpClient.AdvancedSettings2.RedirectDrives = true;
        rdpClient.AdvancedSettings2.RedirectPrinters = true;

        rdpClient.AdvancedSettings2.BitmapVirtualCache24BppSize = 32;

        rdpClient.AdvancedSettings2.EnableWindowsKey = 0;
        rdpClient.AdvancedSettings2.DisableCtrlAltDel = 1;
        rdpClient.AdvancedSettings2.ShadowBitmap = 1;
        rdpClient.AdvancedSettings2.MaximizeShell = 1;
        rdpClient.AdvancedSettings2.CachePersistenceActive = 1;
        rdpClient.AdvancedSettings2.BitmapPersistence = 0;

The problem is this line;
rdpClient.AdvancedSettings2.DisableCtrlAltDel = 1;
if set to 1 it works fine, if set to 0 , will show black screen and disconnected callback raised.

✔️ Expected Behavior

Expect DisableCtrlAltDel could be set to 0

❌ Actual Behavior

     rdpClient.AdvancedSettings2.DisableCtrlAltDel = 1;

if set to 1 it works fine, if set to 0 , will show black screen and disconnected callback raised.

Anything else?

No response

[matt335672]

Hi @fuqifacai

Thanks for raising this.

Are you able to post the contents of /var/log/xrdp.log straight after this happens?

The flag you are referring to is passed to xrdp in a TS_INFO_PACKET, but it's not a flag that we use. Something else may be going on here.