Fwd: [Bug 1952] half-life, unreal tournament: video runs too 1.5x too fast
hatky
hatky at hatky.myz.info
Sun Jan 25 13:29:11 CST 2004
Sound like a valid claim that wine does not update the cpu speed on speed step
speed change....
---------- Forwarded Message ----------
Subject: [Bug 1952] half-life, unreal tournament: video runs too 1.5x too fast
Date: Saturday 24 January 2004 20:30
From: Wine Bugs <wine-bugs at winehq.org>
To: wine-bugs at winehq.org
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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Hatky.
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