xrdp-0.10.1 After VNC connection is successful, it cannot be used(RealVNC on windows)

[baryaor]

xrdp version

0.10.1

Detailed xrdp version, build options

xrdp 0.10.1  --enable-neutrinordp --enable-ipv6 --disable-rfxcodec --enable-devel-logging

Operating system & version

Debian 3.2.57

Installation method

git clone & make install

Which backend do you use?

No response

What desktop environment do you use?

No response

Environment xrdp running on

No response

What's your client?

windws 11

Area(s) with issue?

Other

Steps to reproduce

When vncserver is on windows, its version is RealVNC 6.2.1,I can successfully connect to VNC,but i cannot be operated and the mouse cannot click

✔️ Expected Behavior

No response

❌ Actual Behavior

xrdp-0.10.1 After VNC connection is successful, it cannot be used(RealVNC on windows)

logs：
[2024-10-24T17:15:54.651+0800] [INFO ] [xrdp_mm_setup_mod1(xrdp_mm.c:356)] loaded module 'libvnc.so' ok, interface size 4832, version 4
[2024-10-24T17:15:54.880+0800] [INFO ] [vnc_clip_open_clip_channel(vnc_clip.c:1082)] VNC: Clipboard supports ISO-8859-1 text only
[2024-10-24T17:15:54.884+0800] [INFO ] [find_preferred_text_format(vnc_clip.c:287)] VNC: Format id CF_UNICODETEXT available from RDP client
[2024-10-24T17:15:54.884+0800] [INFO ] [find_preferred_text_format(vnc_clip.c:287)] VNC: Format id CF_<0x0000c3f6> available from RDP client
[2024-10-24T17:15:54.885+0800] [INFO ] [find_preferred_text_format(vnc_clip.c:287)] VNC: Format id CF_LOCALE available from RDP client
[2024-10-24T17:15:54.885+0800] [INFO ] [find_preferred_text_format(vnc_clip.c:287)] VNC: Format id CF_TEXT available from RDP client
[2024-10-24T17:15:54.885+0800] [INFO ] [find_preferred_text_format(vnc_clip.c:287)] VNC: Format id CF_OEMTEXT available from RDP client
[2024-10-24T17:15:54.886+0800] [INFO ] [handle_cb_format_list(vnc_clip.c:338)] Asking RDP client for clip data format=CF_UNICODETEXT
[2024-10-24T17:15:55.829+0800] [INFO ] [advance_resize_state_machine(xrdp_mm.c:1191)] advance_resize_state_machine: Processing resize to: 1280 x 768. Advancing state from WMRZ_ENCODER_DELETE to WMRZ_ENCODER_DELETE. Previous state took 0 MS.
[2024-10-24T17:15:55.835+0800] [INFO ] [advance_resize_state_machine(xrdp_mm.c:1191)] advance_resize_state_machine: Processing resize to: 1280 x 768. Advancing state from WMRZ_ENCODER_DELETE to WMRZ_SERVER_MONITOR_RESIZE. Previous state took 0 MS.
[2024-10-24T17:15:55.840+0800] [ERROR] [resize_server_to_client_layout(vnc.c:409)] resize_server_to_client_layout: Asked to resize server, but not possible
[2024-10-24T17:15:55.845+0800] [INFO ] [process_display_control_monitor_layout_data(xrdp_mm.c:1751)] process_display_control_monitor_layout_data: mod_server_monitor_resize failed 1
[2024-10-24T17:15:55.849+0800] [INFO ] [advance_resize_state_machine(xrdp_mm.c:1191)] advance_resize_state_machine: Processing resize to: 1280 x 768. Advancing state from WMRZ_SERVER_MONITOR_RESIZE to WMRZ_ERROR. Previous state took 1 MS.
[2024-10-24T17:15:55.122+0800] [INFO ] [dynamic_monitor_process_queue(xrdp_mm.c:1977)] dynamic_monitor_process_queue: Clearing failed request to resize to: (w: 1280 x h: 768)
[2024-10-24T17:16:12.637+0800] [INFO ] [find_preferred_text_format(vnc_clip.c:287)] VNC: Format id CF_UNICODETEXT available from RDP client
[2024-10-24T17:16:12.637+0800] [INFO ] [find_preferred_text_format(vnc_clip.c:287)] VNC: Format id CF_TEXT available from RDP client
[2024-10-24T17:16:12.638+0800] [INFO ] [find_preferred_text_format(vnc_clip.c:287)] VNC: Format id CF_LOCALE available from RDP client
[2024-10-24T17:16:12.638+0800] [INFO ] [find_preferred_text_format(vnc_clip.c:287)] VNC: Format id CF_OEMTEXT available from RDP client
[2024-10-24T17:16:12.639+0800] [INFO ] [handle_cb_format_list(vnc_clip.c:338)] Asking RDP client for clip data format=CF_UNICODETEX

remarks：
1.When vncserver is on Linux, its version is TigerVNC 1.8.0, and it works normally on xrdp 0.10.1
2.When vncserver is on windows, its version is RealVNC 6.2.1,I can successfully connect to VNC,but i cannot be operated and the mouse cannot click,The error log is as shown above

Anything else?

No response

[matt335672]

Thanks for using the form @baryaor. It's not only important for us - it's important for other users who may have similar issues.
The VNC server is running in read-only mode. Here are some possibilities:-

1. You're starting the RealVNC server in read-only mode. I don't have access to RealVNC (it's closed source), so I can't help you with that.
2. Some VNC servers allow you to set a read-only password and a read-write password. Check you're using the right password.
3. Some versions of RealVNC run in read-only mode for often bizarre reasons. See Raspbian : Can't click icons with screen blanking enabled #1701 for an example with Raspbian (which shipped with RealVNC).

[matt335672]

@baryaor - did you get any further with this?

[baryaor]

After deleting the 'error=1' in the "resize_server_to_client_layout" function in the "vnc. c" , it works normal, but I'm not sure if there are any other effects

[baryaor]

I tested xrdp-0.9. x and did not find this issue

[matt335672]

Thanks.

What seems to be happening is the VNC server is being asked to resize, even though it doesn't support that feature.

I've submitted a request to RealVNC for a download of 6.2.1 so I can try to reproduce this (it's not a free product). In the meantime, can you try adding this line to the [Xvnc] stanza in xrdp.ini:-

enable_dynamic_resizing=0

that might be sufficient. Please let me know either way.

[matt335672]

I've had a reply from RealVNC also. They ask if you are in a position to try with the latest version 7.13.0. Is this something you can do?