Ugh. Try an active one that explicitly supports 3840×2160.It's a passive adapter.
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Ugh. Try an active one that explicitly supports 3840×2160.It's a passive adapter.
What devices, out of curiosity?Just testing out my SIIG adapter with the different devices I have around.
I think this one: https://www.siig.com/hdmi-to-usb-c-port-4k-60hz-converter-adapter.htmlWhat devices, out of curiosity?
So what kind of cable did you use? I'm using a ThinkPad T490s as working computer and want to connect it to my 27" LG27MD5KA. I see they use the same graphics card so if you get it to work I thought it's possible on mine as well.Guys, success, 5K@30Hz is possible on Thinkpad T480s!
Lenovo Thunderbolt 3 Dock that I've mentioned before is not needed. It works with the display directly connected to laptop's Thunderbolt port.
Yes, I got 5K on that bloody Thinkpad with crappy Intel integrated graphics!
A bit of blind luck I guess. I've looked into needed bandwidth calculation and figured 5K@30Hz should work on that 20Gbps port. I've tried first with CVT-RB and it worked but something was slightly off. My scaled resolution (set at 200%) scaling was being reported as 2560x1441 and I've seen some slight artefacts in fonts.
So I've tried to simply replicate the same set up as for 4096 x 2304 (back porch, front porch, sync width) but with 5120 x 2880 and 29.999Hz. Amazingly enough, it works and looks super crisp.
And 30hz is good enough for job I'm doing on that laptop
I'm attaching the screenshot of joy
EDIT: I've managed to get up to 39Hz, anything above that is simply not recognized.
If it is the early UltraFine, it only works via Thunderbolt, making the Wacom Link Plus useless.bought the Wacom Link Plus after reading this thread.
Darn it!If it is the early UltraFine, it only works via Thunderbolt, making the Wacom Link Plus useless.
Old 5K: https://www.lg.com/us/monitors/lg-27MD5KA-B-5k-uhd-led-monitorDarn it!
I wonder if the display supports the tighter CVT-RBv2 timings SwitchResX can generate for a slightly higher refresh rate. (With that being said, the UF's 3840x2160 60 Hz timing uses a pixel clock of 522 MHz iirc while CVT-RB uses 533 MHz.)For the New 5K, a USB-C connection can work up to 5K 39 Hz - pixel clock ≈600 MHz.
I'm replying here to myself to give the answer if anybody else wants to know.I have a working laptop Lenovo T490s I want to connect to an Ultrafine 5K model 27MBD5KA, what solution would work for this? the less cables the better.
I read mention of a CVT-RBv3 today (in the edid-decode code). I guess you can try different vertical and horizontal blanking numbers anyway.I wonder if the display supports the tighter CVT-RBv2 timings SwitchResX can generate for a slightly higher refresh rate. (With that being said, the UF's 3840x2160 60 Hz timing uses a pixel clock of 522 MHz iirc while CVT-RB uses 533 MHz.)
I guess the T490 only has one DisplayPort connection to the Thunderbolt controller (like many pre-Thunderbolt 4 PC laptops and desktops). I wonder if the 27MBD5KA can accept a 5K 39Hz single DisplayPort timing (over Thunderbolt) like the 27MBD5KL can?My T490s had a thunderbolt port, and it works straight of the port with the oldest 5k model 27MBD5KA. No 5k resolution but I can choose from 4096x2304 60hz and 3840x2160 60hz which is good enough for what I'll use it for. Even speakers and webcam is working.
Since I'll be running my 21.5" UltraFine off a Nvidia Kepler card with a 540 MHz pixel clock limit, I'll play around with timings anyway to see how high a refresh rate I can get. 48 Hz isn't bad but the higher the better.I read mention of a CVT-RBv3 today (in the edid-decode code). I guess you can try different vertical and horizontal blanking numbers anyway.
Kepler supports DisplayPort 1.2 (HBR2) so it should be able to do 10bpc up to 576MHz and 8bpc up to 720MHz (minus some overhead). The new LG 5K is limited to ≈600 MHz (tested by someone else). Given that DisplayPort and the LG are digital, 600MHz doesn't really make sense. An HBR2 signal is always 5.4Gbps (per lane) regardless of pixel clock (DisplayPort uses filler bytes if the bandwidth is greater than required for the pixel clock). Is there a converter that takes DisplayPort and converts it to clocked pixels (no filler bytes, like DVI/HDMI)? In that case there may be limits for pixel clock, horizontal and vertical sync front porch, pulse width, and back porch. Maybe higher pixel clock is possible with greater horizontal and vertical sync/blanking numbers (front, pulse, back)? In that case you have to weigh the gain in pixel clock with the loss to blanking periods. The time for each part of the blanking isSince I'll be running my 21.5" UltraFine off a Nvidia Kepler card with a 540 MHz pixel clock limit, I'll play around with timings anyway to see how high a refresh rate I can get. 48 Hz isn't bad but the higher the better.
pixel_count ÷ pixel_clock
. So once you find a limit using CVT-RB, see if you can increase the pixel clock further by increasing the sync/blanking numbers (front, pulse, back) such that new_pixel_count ÷ new_pixel_clock == old_pixel_count ÷ old_pixel_clock
. Once you find a pixel clock limit, then you can try decreasing the sync/blanking numbers (front, pulse, back).Kepler supports DisplayPort 1.2 (HBR2) so it should be able to do 10bpc up to 576MHz and 8bpc up to 720MHz (minus some overhead).
What devices, out of curiosity?
I'd suspect that Thunderbolt-to-HDMI thingy first. I've had no show-stopping issues using my 21.5" on Mavericks on a Late 2013 15" rMBP with Intel Iris Pro graphics (only 3840×2160 60 Hz) or from a Nvidia Kepler eGPU (4096×2304 48 Hz) so it being unsupported doesn't mean it won't work. This was via DisplayPort, "of course".11" 2013 MacBook Air, via third party Thunderbolt to HDMI adapter - Could only get 720p unfortunately. It doesn't work with a Thunderbolt 2 cable either. This could be because it's running Mavericks, so the monitor is technically not supported software-wise.
Oh right. I tested this in Mojave with an EVGA Nvidia GTX 680 Mac Edition in a MacPro3,1 (since DisplayPort doesn't work in Catalina). It wouldn't let me do more than 539.00MHz for DisplayPort (using SwitchResX). I didn't try creating a pixel clock patch.I was going by this:
The GK110 apparently can do 592 MHz which is so "frustratingly" close to the 21.5"'s 60 Hz timing (593.8 MHz).It wouldn't let me do more than 539.00MHz for DisplayPort
I can get an adapter to go HDMI -> Thunderbolt 3 on Amazon
That means the screen is black? Are you using the USB-C cable that came with the monitor, not the Thunderbolt cable?Speakers only are detected with USB-C.
Exactly, screen is black and not detected by Windows, speakers work fine. I’m using the usb-c cable. I tried this cable with my M1 MacBook Pro and it’s OK (like the TB cable).That means the screen is black? Are you using the USB-C cable that came with the monitor, not the Thunderbolt cable?