Gentoo Archives: gentoo-user

From: Volker Armin Hemmann <volkerarmin@××××××××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Maybe OT: Sync freq of LCDpanel != framerate of movie ?!?
Date: Sat, 24 Apr 2010 15:53:17
Message-Id: 201004241752.41361.volkerarmin@googlemail.com
In Reply to: Re: [gentoo-user] Maybe OT: Sync freq of LCDpanel != framerate of movie ?!? by meino.cramer@gmx.de
1 On Samstag 24 April 2010, meino.cramer@×××.de wrote:
2 > Mick <michaelkintzios@×××××.com> [10-04-24 17:20]:
3 > > On Saturday 24 April 2010 15:58:23 meino.cramer@×××.de wrote:
4 > > > Mick <michaelkintzios@×××××.com> [10-04-24 16:56]:
5 > > > > On Saturday 24 April 2010 14:33:39 William Kenworthy wrote:
6 > > > > > Not sure if it will help, but try setting your kernel jiffies to
7 > > > > > 300hz? - 300 is evenly divisible by both 60 and 50 and I think was
8 > > > > > introduced for this reason.
9 > > > >
10 > > > > Assuming your "jiffies" imply the kernel's setting of
11 > > > > CONFIG_HZ_300=y, we're still talking about the kernel here, not the
12 > > > > video card ...
13 > > > >
14 > > > > Anyway, isn't CONFIG_HZ_1000=y a better option for a modern desktop?
15 > > > > 1000 is also divisible by both 50 & 60.
16 > > >
17 > > > ...how carefully do you devide 1000 by 60 to not to break it apart ?
18 > > > ;)
19 > >
20 > > Oops! It is evident that I cannot use a calculator! O_O
21 >
22 > It is -- of course -- definetly a bug in the firmware of the
23 > calculator! Sure! :)
24 >
25 > I have looked into my .config and it says to run my box with 1000Hz.
26 >
27 > I will try to set it at 300Hz, which will bring mplayer to protest
28 > against...
29 >
30 > But if my LCD will better live with 300Hz ...
31 >
32 > Ok, other ideas what produces the distortions?
33
34
35 kernel jiffies have nothing to do with that. Absolutely nothing. Apart from that
36 it is a wise choice - 100 is too low for a desktop and 1000 is too much.
37
38 First off all, turn off 'vsync'. Also try opengl as output instead of xv. And if
39 your display can do 75hz it might be a good thing to try.
40
41 Oh - and the freqs of the current has nil influence at all.

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