Poly Studio P21 monitor with DisplayLink driver

jordan

photon78s what gaming display do you use with no dithering ?! Is it comfortable then?

photon78s

The "gaming display" of lenovo legion 7i laptop (nvidia 4080, gen 8). Screen panel:

https://www.blisscomputers.net/lenovo-legion-pro-7i-16irx8h-2560x1600-240hz-display-ne160qdm-nz3-boe0b8b-screen-36870/

So far at 240 hz setting it is ok, 40-50 % brightness. Still some minor eyestrain but I think that is to be expected. For me at least, it feels better at 240 hz than at 60 hz. Probably from motion smoothness as well. It is suppose to have no flicker for the backlight. Maybe some temporal dithering or other image instability is there but beyond the limits of my measuring.

I also tested pixel inversion on the lagrom test and it seemed decent enough. If I connect a normal 60hz lcd external display, I measure significant dithering from either usb-c or hdmi output with the graphics set to discrete graphics in bios. Ideally, I don't want to rely on high refresh as a band-aid solution. Also, it seems from this forum that using high refresh rate is hit or miss with some preferring standard refresh rates. So many other factors to consider.

karthi3219

owmyeyes Hi, how is Poly 21 monitor for extended usage? Is it working good for you even with the bad setup? I am thinking to buy this to use with my Macbook M1. Any suggestions?

owmyeyes

Sorry for the late response. I have used this monitor extensively for the last 10 months (about 40 hours per week).

It's been absolutely awesome - zero eye strain even with my "bad" work laptop.

reaganry

they're going for $40 at that bhphoto link above fyi. down for one. well$ 60 with tax and shipping..

owmyeyes

Thanks for the heads up. I picked up another one to keep as a spare.

This is the only monitor that works with ANY computer connected to it. It's because the Display Link driver "breaks" the usual graphics processing pipeline and re encodes the graphics before sending to the monitor.

If anybody with dithering sensitivity is on the fence, I highly recommend trying it out for $40. It's a discontinued product and this might be the last chance to get it.

karthi3219

owmyeyes is this display driver alone the reason that works for you? or both driver & this specific monitor in combinations?

as @machala mentioned above, have you tried different monitor using USB to HDMI with displaylink adaptor using same software driver in the settings? this is to rule out - this specific monitor

reaganry

Im Sick and dizzy after staring at this poly21 yesterday. It has bright led floodlights you cant turn off. displaylink does feel quite different though and worth exploring.

karthi3219

hey how do you connect this monitor with macbook? I am not able to find the driver needed for macos.

any display link driver would work or we need poly studio 21 specific drivers?

karthi3219

if display link driver is the true savior, how can we try the normal monitor with display link drivers? probably any other monitors with USB input can be tried? I am thinking instead of buying this discontinued product, how can we dry this driver with an existing monitor?

macsforme

karthi3219 You can purchase a USB to HDMI (or DisplayPort) DisplayLink adapter to connect any standard monitor with a suitable port to your Mac using this method.

The macOS DisplayLink drivers are available from the DisplayLink web site.