[Bug 39418] New: Infinity Engine games (Baldur's Gate 1-2, Icewind Dale 1-2, Planescape:Torment) hang frequently when realtime priority enabled

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=39418

            Bug ID: 39418
           Summary: Infinity Engine games (Baldur's Gate 1-2, Icewind Dale
                    1-2, Planescape:Torment) hang frequently when realtime
                    priority enabled
           Product: Wine-staging
           Version: 1.7.52
          Hardware: x86
               URL: http://www.fileplanet.com/164134/160000/fileinfo/Baldu
                    r's-Gate-II-Demo-%5BFull-Install%5D
                OS: Linux
            Status: NEW
          Keywords: download
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: gyebro69 at gmail.com
                CC: erich.e.hoover at wine-staging.com, michael at fds-team.de,
                    sebastian at fds-team.de
      Distribution: ---

When changing the priority of running applications is enabled in staging, those
games built on Bioware's Infinity Engine lock up at various stages (but always
in the first 1-2 minutes after the game was started).
There's nothing written in the terminal, the game executable consumes 100% CPU
after freezing.
The games are running stable if I unset the STAGING_RT_PRIORITY_BASE variable
(or set it to 0).

In etc/security/limits.conf I have
gyebro - rtprio 90
gyebro - nice -10

I changed the value of 'STAGING_PRIORITY_BASE=' in ~/.bashrc between 1 and 85,
but this didn't change the bahaviour.

The problem seemingly occurs randomly thus I can't give you the exact steps to
reproduce the problem. Sometimes the games hang while I'm navigating in the
menus, during character generation or when loading a saved game.
Occasionally I can get in the game but it always freezes in 1-2 minutes.
It seems to me that the I need to interact with the game to trigger the bug:
the game runs stable if I let it idle either in the menus or in mid-game. The
hang occurs when I click on a button in the menus or when issuing a move
command.

I have those games from GOG.com, but the problem is reproducible with the
original Baldur's Gate 2 demo too (released in 1998).
Install BG2 demo, start the game with BGMain.exe. Sometimes it freezes when I
click on the options button in the main menu. If not, start a new game, follow
the steps to generate a character and get in the game.Select your character and
move him/her across the screen, interact with the buttons in the UI
etc...there's no rule when the bug happens.

wine-1.7.52-190-gd548639 (Staging)
Fedora 22 32-bit

bg2_fullinstall.zip (618M)
sha1: 0dbdd3164c452235c25ed65c6050584a7ee93122

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