[Bug 1952] half-life, unreal tournament: video runs too 1.5x too fast

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=1952


lesha at netman.ru changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|FIXED                       |




------- Additional Comments From lesha at netman.ru  2004-24-01 14:30 -------
I finally know exactly what was going on. Someone knowledgeable needs to decide
if this is a problem Wine should fix. My laptop has SpeedStep, and if you power
it up without AC power, it will boot in 1200 Mhz, and /proc/cpuinfo will list
1200 mhz. Turning on AC power switches back to 1700Mhz (or manual acpi
adjustments). However, /proc/cpuinfo reflects only 1200. Wine apparently uses
CPU cycles for timing (IMO, a lousy idea). Thus, when I had gone through power
up without AC, later switched to AC, Wine thinks that my Mhz rating is lower
than it is, and I get a speed increase of 42%. If I now use ACPI to reconfigure
as 1200 Mhz, I end up with normal speeds again. So, really, ACPI could be
considered at fault for not updating cpuinfo. But maybe /proc/cpuinfo isn't even
the right place to read this information. Or at least, maybe one shouldn't rely
on reported MHz for timing. For instance, the native shooters (Prboom, Quake3)
don't mind at all if I switch the CPU frequency mid-game. Opinions?

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