[Bug 5632] New: idle waiting in serial emulation?

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=5632

Summary: idle waiting in serial emulation?
           Product: Wine
           Version: 0.9.14.
          Platform: PC
               URL: http://www.vandyke.com/download/securecrt/
        OS/Version: Linux
            Status: UNCONFIRMED
          Keywords: download
          Severity: normal
          Priority: P2
         Component: wine-misc
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

I need SecureCRT for it's terminal emulation and serial port capabilities.

Download at specified URL (enter any random information in the provided 
fields).

I connect to a device on COM1 / 115200n81 / vt102.

If the device on COM1 is generating output, for example if I have set it in 
a "while [ true ]; do ls -l; done" loop using eg. minicom, then SecureCRT 
works fine and is responsive.  It does consume 100% CPU though, 50% goes to 
SecureCRT.EXE and 50% to wineserver (on a hyperthreading CPU).

If the device does NOT generate any output, then SecureCRT deadlocks.  It 
doesn't even repaint it's window, and it's unresponsive to mouse and keyboard 
events.  In this case, wineserver and SecureCRT.EXE also consumes 50% CPU 
each.

AFAICG, the thread that runs the message loop doesn't get enough CPU time, 
because SecureCRT and Wine is busy idle waiting somewhere in the serial code.