[Bug 23286] New: Disconnected: Server unable to authenticate Steam ID

http://bugs.winehq.org/show_bug.cgi?id=23286

Summary: Disconnected:  Server unable to authenticate Steam ID
           Product: Wine
           Version: 1.0-rc4
          Platform: x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Playing Left4Dead and Left4Dead 2, I get consistently dropped from online games
with the message "Disconnected:  Server unable to authenticate Steam ID".  This
may happen anywhere from 10 seconds to 20 minutes into an online game.

At first, I thought this was a game bug, as some Windows users had reported the
same problem.  Unfortunately, most of those users were having the problem due
to corrupt cache files, which I've ruled out.  Copying the game files from my
Linux partition to my Windows partition and vice-versa, the game only fails
when run under Wine.

What I've tried:

- Deleting the ClientRegistry.blob,

- Deleting all of the Steam files and re-downloading.

- Validating/defragging the games' cache files

- Forcing steam to use TCP instead of UDP (-tcp option)

- Turning down all in-game settings to ridiculous levels (though they run fine
at 'high' levels)

- Renaming and re-copying my entire steam directory from my Windows NTFS
partition, where it works fine, to my Linux EXT3 partition.

- Creating a fresh Wine prefix.

I do not see anything in the console log that indicates an error when the
disconnection occurs.  :(

Any suggestions for further troubleshooting are welcome.

Specs:

OS: Kubuntu 10.04 & 10.10 alpha (AMD64 - fully patched 10--6-20)
  Processor: Intel Core i7 980X
  Memory: 6 GB DDR3-1600 Triple Channel
  Video Card: Asus EN9800GTX+ (tested with nvidia 195.36 & 256.35 drivers)
  Motherboard: Intel X58