Talk:Screen tearing
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Could you provide a (made-up) screenshot? ~~helix84 12:48, 11 January 2006 (UTC)
[edit] Tearing
This artifact occurs on plasma televisions, too. Why is the article written specifically for video games? --71.184.105.187 03:28, 21 October 2007 (UTC)
Does this happen on Progessive scan outputs, where the whole frame is pushed at once, or only on Interlaced displays? Cherrera 06:39, 25 February 2006 (UTC)
- it happens on all displays, you can't push the entire image to the screen in one instance. Screens are drawn line by line, whether it's lines 1, 2, 3, 4, 5, 6... on progressive scan, or 1, 3, 5... 2, 4, 6... on interlaced, it still happens whenever the image changes and the raster is not at the point of v-sync 84.92.62.165 17:24, 18 June 2007 (UTC)
we need an image to illustrate this. I'm a mutant geek, and even I'm not sure what it looks like. Sys Hax 08:29, 29 November 2006 (UTC)
- You've never seen tearing? Lucky, it really annoys me in games, especially First-person shooter, here is a screen shot I Googled but don't just insert it in to the article, I have no idea of the copyright status: http://img141.imageshack.us/img141/7274/naamloos9ep.jpg Notice there appears to be four separate frames sliced together like a photo-fit, that's because the image in the V-RAM updated 4 times faster than the graphics card could push it to the monitor. 84.92.62.165 17:24, 18 June 2007 (UTC)
I just noticed another wiki has an illustration, maybe we can ue it? http://www.mythtv.org/wiki/index.php/Frame_display_timing 84.92.62.165 17:27, 18 June 2007 (UTC)
I thought page tearing is only a major problem in CRTs because CRTs scan using lines from top to bottom, whereas digital screens update at once. Part of this reasoning comes from the way the GunCon works, because it relies on CRT scanline timings to determine its position, and hence why it doesn't work on a digital display. Also in the several years I've played PC games on LCD screens, I've never encountered page tearing. And while I've encountered poor timing artifacts in some movies, namely from DVD's, those were mostly due to poor de-interlacing or motion compensating techniques. Besides, it doesn't make sense for digital displays to use scan lines. XenoL-Type 10:11, 23 November 2007 (UTC)
LCD's definitely experience tearing when playing PC games. I can turn off v-sync in Bioshock and within moments I'll notice the hideous screen tearing and have to turn v-sync back on.
It's already been covered that if you want to fix tearing, use v-sync. I will always turn on v-sync if the option is there, no question. But what if the option isn't there? (ie. almost all console games) Is there ANYTHING you can do to get rid of the tearing? One of those new 120Hz TV's? (I doubt it.) Unfortunately more and more console games are tearing without ANY v-sync option and it's driving me nuts, to the point where I refuse to buy any game with confirmed tearing! --Exodite (talk) 07:33, 25 November 2007 (UTC)
I thought page tearing is only a major problem in CRTs because CRTs scan using lines from top to bottom, whereas digital screens update at once.
The image is transmitted to LCDs and CRTs the same way: pixel-by-pixel, row-by-row (DVI is essentially a digitalized version of VGA, complete with sync and blanking). Tearing happens if the frame buffer gets updated with a new image while the image is being transmitted (the time it takes to transmit the image depends on the refresh rate and the amount of blanking, but it is slightly less than the refresh period, which is ~16ms at 60Hz for example). Even if LCDs updated the screen instantaneously (impossible, because that would require infinite bandwidth), the DVI/VGA interface would make them susceptible to tearing. I don't know if this applies to laptops, which probably don't use VGA/DVI between the built-in display and the frame buffer. Totsugeki (talk) 13:53, 14 March 2008 (UTC)
The article says: Screen tearing can be prevented by altering both the device outputting the video and also the device displaying it. How can altering the display device prevent tearing, when it is the output device that's feeding the display device with a torn image? .oisyn (talk) 12:06, 9 June 2008 (UTC)
[edit] Rewritten
I've rewritten the article and also included a prevention section since most people coming here will most likely be looking for a solution... Please do add what you know and some references are probably needed as well. ShadowFusion (talk) 11:58, 19 May 2008 (UTC)
