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Pro Display XDR - Owners Thread
- Thread starter - rob -
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Because USB-C provides more power to the display than a single USB-A usually does?
You mean why it's ridiculous? Because one USB should be enough for power and data.
No, it's not for display powering, I suppose it's for powering the adapter itself. Connectivity looks the same with Wacom Link Plus - you need two USB cables, one for power, another one for data. Sounds stupid, but it is as it is.
VR headset needs power + usb + dp. Presumably it needs more power than one USB 3.0 connector can provide, so this cable has two connectors. But I think 900 mA should be enough for charging, why it requires more?
Ah, this sounds like “convex”, while curved displays will look a little “concave”. Two questions:
1) Do you wear glasses? Many short-sighted folks like myself will see barrel distortion which leads to things looking convex.
2) Have you gotten used to it over time? Our brains can get used to correcting some amount of distortion from eyes/glasses, or even just curvature in real life like a monitor, and when you change things up (like the style of monitor), your brain still applies that correction for a bit before it adjusts again.
Human vision is crazy.
Sure, happy to help if you're still up for doing this. I've been hunting for a stable 4-port KVM switch for awhile now, and can share some test results:
| KVM Switch | Description | Results | Tested by |
| Startech SV231DPU34K 2-port | DP1.2 2-computer 1-monitor | Works | wago |
| Monoprice Blackbird 4K | DP1.4 4-computer 1-monitor | Unstable | wago |
| SiiG CE-KV0H11-S1 | DP1.4 4-computer 1-monitor | No 6k, works at 4k (no DSC) | wago |
| SiiG CE-DP0F11-S1 | DP1.2 2-computer 1-monitor | Works | wago |
| SiiG CE-KV0C11-S1 | DP1.4 2-computer 1-monitor (plus HDMI output) | No (HDMI port uses some DP lanes maybe?) | wago |
| TESmart PKS0802A10-USBK | DP1.2 4-computer 2-monitor | Unstable | wago |
| Level1 Techs | DP1.4 4-computer 1-monitor | Works | wago |
| CABLEDECONN USB-C Switch | USB-C 2-in 1-out | Works (some artifacts, may be cable related) | etc |
I'd also say that while the SiiG switches had variable results, their support team has been awesome to work with as we try to debug the problems. I'm now using the Level1 Techs 4-port switch, and it's rock solid so far. What's interesting is that the working Startech, SiiG, and Level1 Techs devices are nearly identical externally -- I suspect the same ODM behind all three of them, but don't know for sure.
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I'd like to add to my experience with CABLEDECONN USB-C Switch that sometimes I get flashing artifacts (one forth of the screen for one or two frames is covered with random color pixels) on a PC and need to switch back and forth to get rid of them. This happens not very often, so it's not critical for me, but worth to mention.
The same report I've seen on Amazon and there was a solution for that: use shorter cables, the total length should be less than 3m. My cables are about 4 meters long in total, so I'll try this solution and share my experience.
Yes, especially for 6K signal I suppose. For PC I use a basic 10 gbps cable and it's about 2.5 meter long, so I'll try 1,5 meter fancy looking cable that comes with the switch, but it can be too short for my setup 🤔
Cool, thanks for saying so. I have not managed that kind of thread yet so I’ll look at this next time I’m able and ping y’all.
Guys, does anybody use XDR with Hackintosh? I just bought RX 6600 XT and connected XDR to it through PCIe USB-C + DP Alt Mode adapter card.
I've got full 6K@60 + HDR resolution in both Mac & Windows, but macOS determines XDR display as 5K:
At the same time full 6K resolution is available and I switched to it:
But still, default res is 5K and I see that it's used in Login Window. Does anyone know how to fix that and make 6K as default?
I've got full 6K@60 + HDR resolution in both Mac & Windows, but macOS determines XDR display as 5K:
At the same time full 6K resolution is available and I switched to it:
But still, default res is 5K and I see that it's used in Login Window. Does anyone know how to fix that and make 6K as default?
Found BetterDisplay that allows to override display settings. At first I changed physical resolution (was 0 x 0) and default resolution:
Now XDR native resolution determined correctly in About, but at the same time I've got vertical resolution list instead of horizontal slider in settings. I'm trying to fix it, will update this post.
* UPDATE *
Finally I managed to get this with BetterDisplay:
I've got these resolutions here:
1504x846 (as it is on native Mac)
2048x1152 (should be 1920x1080)
2560x1440 (same as Native Mac)
3008x1692 as default (hooray!), but on native Mac this one is the highest available
3360x1890 - more space
What I've changed:
1. Limited max res:
It made 3008x1692 (HiDPI) marked as default resolution
2. Set native pixel resolution:
Now XDR resolution is determined correctly in System Information and everywhere else
3. Default resolution eventually left unchanged:
It seems max resolution setting makes the default resolution correct. Resolution is also correct in Login Window - same as default.
Also I wrote raw display name as "Pro Display XDR", because when I enabled configuration override in BetterDisplay settings, XDR's name changed to "ProDisplayXDR" (without spaces) everywhere in the system, so I changed it back to original. I assume that's because in this case the display name is taken from EDID where it's present without spaces due to string length limits.
BetterDisplay is a trial app, but I think these changes will persist even when the trial expires.
I think that's enough to make it look right, despite slight differences in the list of available resolutions compared to a genuine Mac. Now I have two machines: a PC with Ventura + Win10 and M1 MacBook Pro - both connected through USB-C KVM switch to XDR.
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Which USB-C + DP Alt Mode PCIe card did you use?
Check the timing info (pixel clock, active pixels) to make sure it's outputting 6K since macOS usually only reports the frame buffer resolution which could be scaled to something smaller. To do that, use SwitchResX, double click the currently selected resolution in the Current Resolutions tab.
Dell WYY76 (also it has the following p/ns: 1H0Y3 / YF1YR / M0W58 / 8NMR3). It's the same board as Delock 89582 or Sunix UPD2018
Can't do this right now, because I need to install AMD card back. But I remember, that SwitchResX reported 6K as a current resolution. Actually, the difference between real 6K framebuffer and any smaller is obvious to my eyes — the character and windows edges sharpness tell everything immediately. I've seen 6K through 5K and 4K framebuffers — blurry characters right here.
You have to look at the timing info of the current resolution in SwitchResX (where it shows the pixel clock and active pixels) - not the name of the current resolution.
I think you mean 6K frame buffer output to a 4K or 5K display.
The frame buffer that macOS draws into is definitely real and is definitely 6K otherwise how would you get a 6K screenshot? I don't know if there's a separate output frame buffer when scaling the draw frame buffer to a lower resolution such as 5K or 4K. I think that would be a waste of vram. I think the scaler should be able to scale without requiring a destination frame buffer. I guess it's an implementation detail that we don't need to know about.
I'll post a screenshot when it's possible.
No, I meant 4 or 5K framebuffer output to 6K display (XDR I have in this case).
Anyway, it's certainly 6K, the only problem I had that it was not marked as default resolution. I managed to fix that with BetterDisplay in post #841
Is anyone here using the Pro XDR with Windows and an AMD GPU?
I have a TB4 controller on my Asus X670E, which uses the jhl8540, but I only get 5k max resolution using my RTX 4090. Asus confirmed that's the case on their end, but that they get 6k as intended with an AMD RX 7900 XTX when using DisplayPort pass through on the motherboard. What I thought was an Intel bug now looks like an Nvidia bug?
I have a TB4 controller on my Asus X670E, which uses the jhl8540, but I only get 5k max resolution using my RTX 4090. Asus confirmed that's the case on their end, but that they get 6k as intended with an AMD RX 7900 XTX when using DisplayPort pass through on the motherboard. What I thought was an Intel bug now looks like an Nvidia bug?
Maybe you need a custom timing to get 6K. Check the EDID using CRU.
What GPU is connected to the Thunderbolt controller? I don't see in the User Manual a DisplayPort pass thru that would let you connect the RTX4090 to the JHL8540. Check the Device Manager, view by connection, and see what GPU the display is connected to.
Try a non-Thunderbolt connection directly to the RTX 4090 to make sure you can get 6K60. Use a DisplayPort + USB 2.0 to USB-C cable.
Maybe try connecting using a USB-C cable instead of a Thunderbolt 3 cable. It will work as Thunderbolt 20 Gbps which is enough for 6K60 if DSC is working.
Your question is very interesting for me because I have Gigabyte Z590 Vision D mb with onboard JHL8540 same as yours. I couldn't get 6K through TB4 controller, only 5K max same as you, so I went to USB-C options.
But after your post I decided to try TB again and this time use AMD GPU instead of Nvidia. And I got 6K in both macOS and Windows! It seems that's really Nvidia bug.
I also need to specify, that I couldn't get a picture when XDR was connected directly to TB4 port. It worked only when it was connected to USB-C KVM switch. I guess this switch forces XDR to work in USB-C DP Alt Mode instead of TB or maybe I misconfigured in BIOS something.
Anyway, when I use AMD GPU + JHL8540 - I get 6K in both Windows and macOS. In macOS XDR is determined absolutely correctly - the right default resolution, no resolution higher 6K - so no problems that I had previously in this thread. This is a great discovery and it fully fits to my setup with KVM switch.
But with Nvidia GPU this won't work I see - only 5K max through JHL8540. Luckily I have many other options here to go.
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