Re: video out of range
- From: Dances With Crows <danceswithcrows@xxxxxxx>
- Date: 1 Jan 2008 19:25:31 GMT
phil-news-nospam@xxxxxxxx staggered into the Black Sun and said:
Dances With Crows <danceswithcrows@xxxxxxx> wrote:
phil-news-nospam@xxxxxxxx staggered into the Black Sun and said:"Too low" depends on context. It is certainly too low for a
Specifically, the video went dead as soon as X started, and theToo low. Vsync cutoff is usually around 45-50 Hz.
monitor itself popped up a warning saying "Digital Out of Range 30.3
kHz 28 Hz"
reasonable display on a CRT since it would flicker big time. But it
is not too low in principle for LCD.
LCDs are built to emulate CRTs in many ways (big surprise, eh?). Many
LCDs display somewhere near 60 Hz because of the VESA standards.
Section "Monitor" # in xorg.confThe copy of xorg.conf I had did not specify the vertical refresh rate
HorizSync 30-95 # 30-95 KHz
VertRefresh 55-160 # 55-160 Hz
at all. Are you saying that by changing it to look like the above, it
would quit using 28 Hz and go up to at least 55 Hz?
Yes. X is paranoid about video frequencies and doesn't always
autodetect things properly.
Both distros are *probably* attempting to read DDC info from theUsing these distros are actually just for testing. I'll be using
monitor, not getting any info, and putting in some default settings
which fail miserably. Modify your xorg.conf according to the snippet
Slackware after I have all the drivers and parameters figured out, and
later I will be migrating to Gentoo (built under Slackware into a
chroot directory).
You could save time and hassle by just starting with Gentoo if that's
what you want to use in the long run. Follow along with the Install
Handbook (print it out if you don't have a second machine to read it on)
and it's pretty easy for a reasonably experienced user.
I don't know. It's whatever the distro chooses.The video card is Matrox G550 PCIeWhich X module are you using?
This can be a bad idea. Sometimes distros just use VESA as that always
works. The problem with that is you get no 3D, no XV, and you're stuck
at 60 Hz (bad on a CRT).
But Vsync Hz == FPS (in progressive video mode) I'm not usingReally, I'd prefer to have an LCD display that worked down to 23.976Hsync Hz != FPS. It's mplayer/xine's job to feed the video card at
Hz to be able to support HD video in 1000/1001 derated 24 fps
an appropriate rate, and X shouldn't interfere.
mplayer/xine.
So what are you using? If your video player is flickering or tearing
noticably at *any* Vsync rate, you have a problem that is totally
orthogonal to the problem you're trying to solve.
What I am saying is that the _monitor/display_ _should_ be able to
handle these video rates all the way down to 23.976 Hz/fps
The monitor might, but X won't without serious hacking. That Vsync rate
is much too low for normal computer use. I've played many, many DVDs
(video at 24 or 30 fps) via my computer and a similar LCD, and seen no
problems at all despite the LCD acting like it's running at 60 Hz.
"Post Here, Read Here" has been the rule since the Great Renaming.I'll be reading both places. But sometimes people have replies that
are not appropriate for the group (such as software attachments
In general, asking for mailed replies in a Usenet post is considered
gauche. Ah well, HTH,
--
Some people are alive only because it is traditional to keep
torturing the poor guy about being lost in the machine room with an
IBM water buffalo. --MegaHAL, trained on ASR
Matt G|There is no Darkness in Eternity/But only Light too dim for us to see
.
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