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Bug 109161 - TSC fix for media-video/SDLcam on Pentium M CPUs
Summary: TSC fix for media-video/SDLcam on Pentium M CPUs
Status: RESOLVED FIXED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: New packages (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: SpanKY
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2005-10-13 09:17 UTC by Tobias Klausmann
Modified: 2005-10-13 17:36 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


Attachments
TSC assembly fix for SDLcam 0.7.3 (sdlcam-tsc-fix.patch,1.13 KB, patch)
2005-10-13 09:19 UTC, Tobias Klausmann
Details | Diff

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Description Tobias Klausmann gentoo-dev 2005-10-13 09:17:31 UTC
Due to the way Pentium Ms handle TSC and the related assembly, SDLcam in its
current state (v0.7.3 plus the Gentoo patches) does not work on those CPUs
(usually, it fails on startup).

I've created a patch that adresses this issue (TSC timing) so that it works on
Pentium Ms. I've submitted it to the maintainer and he will release a new
version. But according to him this will take some time, so I'm submitting it
here, too. I've tested the resulting binaries on all x86 hardware I have (PIII,
PIV, PM, AthXP) and found no problems. As the original assembly code didn't work
elsewhere (SDLcam has an alternative codepath without assembly), I've not
bothered testing it anywhere else.
Comment 1 Tobias Klausmann gentoo-dev 2005-10-13 09:19:46 UTC
Created attachment 70575 [details, diff]
TSC assembly fix for SDLcam 0.7.3
Comment 2 SpanKY gentoo-dev 2005-10-13 17:36:06 UTC
thanks, now in portage