how to set wuxga 1920x1200@120hz ?

[kokok]

Hello.

Have problem set resolution 1920x1200 by 120hz
or 1920x1080 by 120hz

i have next
1. projector viewsonic ls850wu
2. pc witch ATI hd6850
3. hdmi-hdmi 2.0 cable 5m

the small resolution is work by 120hz but in big not work only maximum work on 75hz

can you help me ?

Thanks a lot.

[ToastyX]

Don't make the same post in two places. What do you mean by not work? What happens? Keep in mind the HD 6850 is old and doesn't support HDMI 2.0. It doesn't even officially support more than 165 MHz pixel clock. Did you patch the driver to allow higher pixel clocks? 1920x1080 @ 120 Hz might be possible if you patch the driver, but 1920x1200 @ 120 Hz is pushing the limits of the hardware. If your card has DisplayPort, you can use a DisplayPort to HDMI 2.0 active adapter instead of patching the driver.

[kokok]

(02-19-2022 06:27 AM)ToastyX Wrote:  Don't make the same post in two places. What do you mean by not work? What happens? Keep in mind the HD 6850 is old and doesn't support HDMI 2.0. It doesn't even officially support more than 165 MHz pixel clock. Did you patch the driver to allow higher pixel clocks? 1920x1080 @ 120 Hz might be possible if you patch the driver, but 1920x1200 @ 120 Hz is pushing the limits of the hardware. If your card has DisplayPort, you can use a DisplayPort to HDMI 2.0 active adapter instead of patching the driver.

Hi.

Thanks for your answer.
displayport you mean DVI-I and DVI-D ? or other port

yes patched pixel clock

[kokok]

Hello @ToastyX

Sorry about posted in two place.


yes patched pixel clock

Testing now again in all test same result

1. cable hdmi---hdmi (2.0)
2. cable hdmi ----dvi-d port
3. cable hdmi ----displayport adapter

The maximum results:

1920x1200@60hz support and work
1920x1200 up 60hz not start the projector "input signal incorrect"

1920x1080@75hz support and work
1920x1080@up 75hz not start the projector "input signal incorrect"

Have any idea ?

(02-19-2022 06:27 AM)ToastyX Wrote:  Don't make the same post in two places. What do you mean by not work? What happens? Keep in mind the HD 6850 is old and doesn't support HDMI 2.0. It doesn't even officially support more than 165 MHz pixel clock. Did you patch the driver to allow higher pixel clocks? 1920x1080 @ 120 Hz might be possible if you patch the driver, but 1920x1200 @ 120 Hz is pushing the limits of the hardware. If your card has DisplayPort, you can use a DisplayPort to HDMI 2.0 active adapter instead of patching the driver.

[ToastyX]

"Input signal incorrect" means the projector doesn't support the resolution/refresh rate. I'm looking at the manual for the LS850WU. The highest resolution it supports 120 Hz is 1280x800.

[kokok]

(02-19-2022 07:11 PM)ToastyX Wrote:  "Input signal incorrect" means the projector doesn't support the resolution/refresh rate. I'm looking at the manual for the LS850WU. The highest resolution it supports 120 Hz is 1280x800.

yes correct i see also manual for 3D mode only max 60hz

and i ckeking test to LG Smart TV and 1920x1080 work by 120hz

and uderstand this problem in projector.

Thank you for your help.