[Bug 52296] New: UltraVNC 1.3.4.0 and later hangs after pressing Connect.

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WineHQ Bugzilla

29 Dec 2021 29 Dec '21

9:48 a.m.

https://bugs.winehq.org/show_bug.cgi?id=52296

Bug ID: 52296 Summary: UltraVNC 1.3.4.0 and later hangs after pressing Connect. Product: Wine Version: 7.0-rc3 Hardware: x86-64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs@winehq.org Reporter: bernhardu@mailbox.org Distribution: ---

Starting vncviewer with no parameters shows the connection window. After specifiying a UltraVNC server (1.3.6.0) and pressing "Connect" the connection window closes and nothing more happens. This is observable with versions 1.3.4.0, 1.3.4.1, 1.3.4.2, 1.3.6.0.

In previous version 1.3.2a after pressing "Connect" a connection status window and another window to enter the password appears.

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WineHQ Bugzilla

29 Dec 29 Dec

9:49 a.m.

New subject: [Bug 52296] UltraVNC 1.3.4.0 and later hangs after pressing Connect.

https://bugs.winehq.org/show_bug.cgi?id=52296

Bernhard Übelacker bernhardu@mailbox.org changed:

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WineHQ Bugzilla

9:56 a.m.

New subject: [Bug 52296] UltraVNC 1.3.4.0 and later hangs after pressing Connect.

https://bugs.winehq.org/show_bug.cgi?id=52296

--- Comment #1 from Bernhard Übelacker bernhardu@mailbox.org --- Created attachment 71450 --> https://bugs.winehq.org/attachment.cgi?id=71450 "WINEDEBUG=+message wine vncviewer.exe", just few seconds.

It seems it loops all the time over window size/position changes.

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WineHQ Bugzilla

3 Jan 3 Jan

4:50 p.m.

New subject: [Bug 52296] UltraVNC 1.3.4.0 and later hangs after pressing Connect.

https://bugs.winehq.org/show_bug.cgi?id=52296

--- Comment #2 from Bernhard Übelacker bernhardu@mailbox.org --- Created attachment 71490 --> https://bugs.winehq.org/attachment.cgi?id=71490 Backtrace while looping with debug symbols also for vncviewer.exe.

Seems SetScrollInfo causes enabling of the scrollbars, which causes WM_WINDOWPOSCHANGED to which the application reacts with ShowScrollBar(SB_VERT, 0, 0) which causes another WM_WINDOWPOSCHANGED which causes SetScrollInfo which enables the scrollbars again ...

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WineHQ Bugzilla

9:48 p.m.

New subject: [Bug 52296] UltraVNC 1.3.4.0 and later hangs after pressing Connect.

https://bugs.winehq.org/show_bug.cgi?id=52296

--- Comment #3 from Bernhard Übelacker bernhardu@mailbox.org --- Tried to find out a little more about it and hit that recursion_count variable in WINPROC_call_window. This variable increases fast until MAX_WINPROC_RECURSION is reached and gets always decreased and increased around that value. If MAX_WINPROC_RECURSION is set to 9 I could get past this issue in time and could connect.

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WineHQ Bugzilla

4 Jan 4 Jan

12:52 a.m.

New subject: [Bug 52296] UltraVNC 1.3.4.0 and later hangs after pressing Connect.

https://bugs.winehq.org/show_bug.cgi?id=52296

--- Comment #4 from Bernhard Übelacker bernhardu@mailbox.org --- Created attachment 71501 --> https://bugs.winehq.org/attachment.cgi?id=71501 Hack to avoid sending a WM_WINDOWPOSCHANGED which leads to a recursion.

Added some logging to the WindowProc of vncserver.exe and this is the message which seems to be where native and wine diverts.

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WineHQ Bugzilla

13 Apr 13 Apr

6:21 a.m.

New subject: [Bug 52296] UltraVNC 1.3.4.0 and later hangs after pressing Connect.

https://bugs.winehq.org/show_bug.cgi?id=52296

jacknone@mail.bg changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |jacknone@mail.bg

--- Comment #5 from jacknone@mail.bg --- I can confirm this issue is present with the latest UltraVNC vncviewer.exe (1.3.8.1) and the latest Wine (built from source cloned from git). I tried applying patch, but apparently there was some refactoring done and it didn't apply. Lowering MAX_WINPROC_RECURSION still does appear to mitigate the issue.

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WineHQ Bugzilla

1 Aug 1 Aug

10:46 p.m.

New subject: [Bug 52296] UltraVNC 1.3.4.0 and later hangs after pressing Connect.

https://bugs.winehq.org/show_bug.cgi?id=52296

Neustradamus Neustradamus@hotmail.com changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |Neustradamus@hotmail.com

--- Comment #6 from Neustradamus Neustradamus@hotmail.com --- Jack None, Bernhard Übelacker: What is the status with latest current version? - 1.4.3.1 (2023-07-07)

All help is welcome to solve it.

Thanks in advance.

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WineHQ Bugzilla

2 Aug 2 Aug

8:34 a.m.

New subject: [Bug 52296] UltraVNC 1.3.4.0 and later hangs after pressing Connect.

https://bugs.winehq.org/show_bug.cgi?id=52296

Bernhard Übelacker bernhardu@mailbox.org changed:

--- Comment #7 from Bernhard Übelacker bernhardu@mailbox.org --- Created attachment 74951 --> https://bugs.winehq.org/attachment.cgi?id=74951 Hack to avoid sending a WM_WINDOWPOSCHANGED which leads to a recursion.

Issue is still visible with current wine git and UltraVNC 1.4.3.1 (Zip, x86 and x64, running winvnc.exe in wine too).

Updated hack because files got moved around. With it applied a connection is possible.

Setting MAX_WINPROC_RECURSION from 64 to 9 also still works around the issue.

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WineHQ Bugzilla

1:51 p.m.

New subject: [Bug 52296] UltraVNC 1.3.4.0 and later hangs after pressing Connect.

https://bugs.winehq.org/show_bug.cgi?id=52296

Neustradamus Neustradamus@hotmail.com changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |julliard@winehq.org

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