Re: Tiling display support
George Shuklin wrote: > On 20/12/2020 00:42, Dan Ritter wrote: > > George Shuklin wrote: > > > On 12/18/20 9:55 PM, Dan Ritter wrote: > > > > George Shuklin wrote: > > > > > I continue to choose hardware carefully, and the next issue (I found > > > > > a lot > > > > > on it) is support for tiling displays. They uses multiple streams > > > > > inside > > > > > DisplayPort to achieve high resolution with high frame rate. It's > > > > > called MST > > > > > (vs classic single SST), and I found few people complaining about > > > > > issues > > > > > with it. All those complains are relatively old (2+ years). > > What are you trying to do? > > > I had made a mistake assuming the monitor I'd chosen supported 4k at 240Hz > (it was announced as 4k and 240Hz). After answers from the maillist I've > rechecked specs and found it's only 60Hz at full res, and 240Hz is there for > lower resolutions. So, that thing is dead. There is no 4k @ 240Hz. > > The next issue is notice from Nvidia site about my video cart saying that it > supports tiling displays only through direct double DP link (two cables with > no hub of multiplexers). I start to read about tiling support in Linux and > found tons of pain (which was slightly eased with newer posts about > --monitor abstraction in xrandr). Instead of absorbing all that pain I've > asked here if someone is using tiled display under Debian. This is the last time I'm going to ask. What actual problem do you have that you are trying to solve? -dsr-
Re: Tiling display support
On 20/12/2020 00:42, Dan Ritter wrote: George Shuklin wrote: On 12/18/20 9:55 PM, Dan Ritter wrote: George Shuklin wrote: I continue to choose hardware carefully, and the next issue (I found a lot on it) is support for tiling displays. They uses multiple streams inside DisplayPort to achieve high resolution with high frame rate. It's called MST (vs classic single SST), and I found few people complaining about issues with it. All those complains are relatively old (2+ years). Does someone run desktop with 4k screen and high frame rate (150 fps+)? What monitor and gpu are you using? Are you having any issues? There are no 4K 150Hz monitors currently commercially available. There are some 4K 120Hz monitors, starting at $800 or so. What is your use case? -dsr- Oh, thanks, I've reread specs. It says 'refresh rate up to 240Hz', but for full resolution it's 5120 x 1440 | 60 Hz. There is LG, which promises 3840 x 2160 144Hz. I'll be more careful. Anyway, my concern is MST support in Linux. Or, can 4k 120Hz fit through a single DP (SST mode)? The Radeon 6900XT has DisplayPort 1.4. The NVidia 2080GTX has DisplayPort 1.4. DP 1.4 supports 4K at 120Hz. DP 2.0 has not yet shown up. What are you trying to do? I had made a mistake assuming the monitor I'd chosen supported 4k at 240Hz (it was announced as 4k and 240Hz). After answers from the maillist I've rechecked specs and found it's only 60Hz at full res, and 240Hz is there for lower resolutions. So, that thing is dead. There is no 4k @ 240Hz. The next issue is notice from Nvidia site about my video cart saying that it supports tiling displays only through direct double DP link (two cables with no hub of multiplexers). I start to read about tiling support in Linux and found tons of pain (which was slightly eased with newer posts about --monitor abstraction in xrandr). Instead of absorbing all that pain I've asked here if someone is using tiled display under Debian.
Re: Tiling display support
On 2020-12-20 02:37, Mark Allums wrote: Oh, thanks, I've reread specs. It says 'refresh rate up to 240Hz', but for full resolution it's 5120 x 1440 | 60 Hz. There is LG, which promises 3840 x 2160 144Hz. I'll be more careful. Which LG model offers 144 Hz at 3480 x 2160? Because I am shopping for a high-refresh 4k device right now, and I haven't run across any model like that from LG. Mark (Preferably 32-inch.) The LG 27GN950-B is 4k, 144Hz but not 32 inch. It also supports FreeSync wich works well on linux with the open source AMD drivers. I highly recommend FreeSync(adaptive sync). If you aren't too attached to LG there are other manufacturers that have larger screens with the specs you requested. --- Steven Mainor 0x9477C19B.asc Description: application/pgp-keys signature.asc Description: OpenPGP digital signature
Re: Tiling display support
Oh, thanks, I've reread specs. It says 'refresh rate up to 240Hz', but for full resolution it's 5120 x 1440 | 60 Hz. There is LG, which promises 3840 x 2160 144Hz. I'll be more careful. Which LG model offers 144 Hz at 3480 x 2160? Because I am shopping for a high-refresh 4k device right now, and I haven't run across any model like that from LG. Mark (Preferably 32-inch.)
Re: Tiling display support
George Shuklin wrote: > On 12/18/20 9:55 PM, Dan Ritter wrote: > > George Shuklin wrote: > > > I continue to choose hardware carefully, and the next issue (I found a lot > > > on it) is support for tiling displays. They uses multiple streams inside > > > DisplayPort to achieve high resolution with high frame rate. It's called > > > MST > > > (vs classic single SST), and I found few people complaining about issues > > > with it. All those complains are relatively old (2+ years). > > > > > > Does someone run desktop with 4k screen and high frame rate (150 fps+)? > > > What > > > monitor and gpu are you using? Are you having any issues? > > > > There are no 4K 150Hz monitors currently commercially available. > > > > There are some 4K 120Hz monitors, starting at $800 or so. > > > > What is your use case? > > > > -dsr- > > Oh, thanks, I've reread specs. It says 'refresh rate up to 240Hz', but for > full resolution it's 5120 x 1440 | 60 Hz. There is LG, which promises 3840 x > 2160 144Hz. I'll be more careful. > > Anyway, my concern is MST support in Linux. Or, can 4k 120Hz fit through a > single DP (SST mode)? The Radeon 6900XT has DisplayPort 1.4. The NVidia 2080GTX has DisplayPort 1.4. DP 1.4 supports 4K at 120Hz. DP 2.0 has not yet shown up. What are you trying to do? -dsr-
Re: Tiling display support
On 12/18/20 9:55 PM, Dan Ritter wrote: George Shuklin wrote: I continue to choose hardware carefully, and the next issue (I found a lot on it) is support for tiling displays. They uses multiple streams inside DisplayPort to achieve high resolution with high frame rate. It's called MST (vs classic single SST), and I found few people complaining about issues with it. All those complains are relatively old (2+ years). Does someone run desktop with 4k screen and high frame rate (150 fps+)? What monitor and gpu are you using? Are you having any issues? There are no 4K 150Hz monitors currently commercially available. There are some 4K 120Hz monitors, starting at $800 or so. What is your use case? -dsr- Oh, thanks, I've reread specs. It says 'refresh rate up to 240Hz', but for full resolution it's 5120 x 1440 | 60 Hz. There is LG, which promises 3840 x 2160 144Hz. I'll be more careful. Anyway, my concern is MST support in Linux. Or, can 4k 120Hz fit through a single DP (SST mode)?
Re: Tiling display support
On 2020-12-19 03:52, Joe wrote: On Fri, 18 Dec 2020 23:55:09 +0100 deloptes wrote: Dan Ritter wrote: >> Does someone run desktop with 4k screen and high frame rate (150 >> fps+)? What monitor and gpu are you using? Are you having any >> issues? > > > There are no 4K 150Hz monitors currently commercially available. OP is asking about 150+FPS and you are talking about 150Hz. I am not convinced it is the same It is if interlace is not used, not if interlace is used. For broadcast television, there is never enough bandwidth, so interlace is used which halves the required bandwidth for very little visual degradation. With a stationary picture such as a computer display, interlace is not used, as it makes a stationary picture appear to jitter vertically. So interlaced 1080i at 50 or 60Hz has a frame rate of 25 or 30 FPS, while progressive 1080p at 50 or 60Hz has a frame rate of 50 or 60 FPS. I'm not sure I understand. Why are we talking about interlaced video? That doesn't seem to be relevant unless I'm missing something. There are plenty of 4k 120Hz and 144Hz monitors on the market right now. I am currently only running dual 60Hz 4K monitors right now with an AMD RX580 GPU each connected via Display Port 1.2 I believe a single Displayport (version 1.3) can support 4K 120 or 144Hz. There may be some useful information at this link https://en.wikipedia.org/wiki/DisplayPort#Resolution_and_refresh_frequency_limits I regret that I don't know anything about MST or SST. Hopefully someone can help you more. I'm interested to learn what you figure out. --- Steven Mainor 0x9477C19B.asc Description: application/pgp-keys signature.asc Description: OpenPGP digital signature
Re: Tiling display support
On Fri, 18 Dec 2020 23:55:09 +0100 deloptes wrote: > Dan Ritter wrote: > > >> Does someone run desktop with 4k screen and high frame rate (150 > >> fps+)? What monitor and gpu are you using? Are you having any > >> issues? > > > > > > There are no 4K 150Hz monitors currently commercially available. > > OP is asking about 150+FPS and you are talking about 150Hz. I am not > convinced it is the same > It is if interlace is not used, not if interlace is used. For broadcast television, there is never enough bandwidth, so interlace is used which halves the required bandwidth for very little visual degradation. With a stationary picture such as a computer display, interlace is not used, as it makes a stationary picture appear to jitter vertically. So interlaced 1080i at 50 or 60Hz has a frame rate of 25 or 30 FPS, while progressive 1080p at 50 or 60Hz has a frame rate of 50 or 60 FPS. -- Joe
Re: Tiling display support
150hz and 150FPS are basically the same thing. The refresh rate of a monitor is usually monitored in hz. Which is just how many times per second the display refreshes refreshes. FPS is usually used to measure how many frames per second a video card can render. So while they may not be exactly the same they are very related. You would need a 150hz display to take full advantage of a video game being rendered at 150FPS, for example. --- Steven Mainor On 2020-12-18 17:55, deloptes wrote: Dan Ritter wrote: Does someone run desktop with 4k screen and high frame rate (150 fps+)? What monitor and gpu are you using? Are you having any issues? There are no 4K 150Hz monitors currently commercially available. OP is asking about 150+FPS and you are talking about 150Hz. I am not convinced it is the same 0x9477C19B.asc Description: application/pgp-keys signature.asc Description: OpenPGP digital signature
Re: Tiling display support
Dan Ritter wrote: >> Does someone run desktop with 4k screen and high frame rate (150 fps+)? >> What monitor and gpu are you using? Are you having any issues? > > > There are no 4K 150Hz monitors currently commercially available. OP is asking about 150+FPS and you are talking about 150Hz. I am not convinced it is the same
Re: Tiling display support
George Shuklin wrote: > I continue to choose hardware carefully, and the next issue (I found a lot > on it) is support for tiling displays. They uses multiple streams inside > DisplayPort to achieve high resolution with high frame rate. It's called MST > (vs classic single SST), and I found few people complaining about issues > with it. All those complains are relatively old (2+ years). > > Does someone run desktop with 4k screen and high frame rate (150 fps+)? What > monitor and gpu are you using? Are you having any issues? There are no 4K 150Hz monitors currently commercially available. There are some 4K 120Hz monitors, starting at $800 or so. What is your use case? -dsr-
Tiling display support
Hello. I continue to choose hardware carefully, and the next issue (I found a lot on it) is support for tiling displays. They uses multiple streams inside DisplayPort to achieve high resolution with high frame rate. It's called MST (vs classic single SST), and I found few people complaining about issues with it. All those complains are relatively old (2+ years). Does someone run desktop with 4k screen and high frame rate (150 fps+)? What monitor and gpu are you using? Are you having any issues?
