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Old 08-04-2018, 11:41 AM   #1
richard_jones
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Default Dell UP3214Q stuck at 30hz over DP!

Hello,

I have a Dell UP3214Q, 4k screen connected via DisplayPort to a D6000 (over USB-C).

Windows will only allow selection at 30hz in 4k resolution!

I have tried:

A different display port cable
A different display port connection on the monitor
The other display port on the d6000
Disconnecting everything else
Changing the default display driver to the Dell ones (for the monitor)
Re-installing windows
Checking the monitor is in DP1.2 enabled mode.

I also tried the monitor on a different computer with DisplayPort, and it works fine at 60hz so I do not thing its the monitor.

Any ideas anyone!

Thanks
Richard
Attached Files
File Type: zip DL_Windows_Logs_20180804_123048.zip (319.3 KB, 1 views)

Last edited by richard_jones; 08-04-2018 at 11:43 AM. Reason: extra things tried
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Old 08-06-2018, 10:50 AM   #2
AlbanRampon
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Hello Richard,
That is peculiar: the monitor does NOT show 4Kp60 as supported in the monitor EDID information.
Here is the exhaustive list of mode reported supported:

EDID DATA (v1.4)
=========
Monitor Type : DEL4093 (DELL UP3214Q)
Monitor ID : K3R904B2288P
Manufactured : 2014.45
Serial Number: xxxx

Display Parameters
==================
Input type : Digital
Color bit depth : 10 bits per Primary Color
Video interface : DisplayPort is supported
Max image size : 70x39cm (31.5" diagonal, 16:9 ratio)
Gamma : 2.200

[...]

Range Limits
============
V Rate : 29 - 75 Hz
H Rate : 31 - 140 KHz
Max Clock Rate : 300 MHz
No secondary timing curve

Preferred Mode : 3840x2160x24@30

[...]

Display Modes
=============
640x480x24@60
640x480x24@75
720x400x24@70
720x480x24@60
720x576x24@50
800x600x24@60
800x600x24@75
1024x768x24@60
1024x768x24@75
1152x864x24@75
1280x720x24@50
1280x720x24@60
1280x800x24@60
1280x1024x24@60
1280x1024x24@75
1600x1200x24@60
1680x1050x24@60
1920x1080x24@24
1920x1080x24@50
1920x1080x24@60
1920x1200x24@60
2560x1440x24@60
3840x2160x24@30

-> 1 extension blocks present
-> Extension 0 : 02 : EIA/CEA 861 standard Timing Extension block is valid
Checksum Valid : 0xa3


Could you cross-check the monitor settings? What type of cable do you have between the dock and the monitor? (connector type on each end) The reason I'm asking is the EDID is consistent with HDMI 1.4 so used with HDMI or DP++ modes.
4Kp60 would be higher than the advertised max clock rate of 300MHz. So both are consistent.
Unless the EDID allows higher, we won't try higher.

Kind regards,
Alban
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Old 08-06-2018, 11:22 AM   #3
richard_jones
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Hi Alba,

Thanks for coming back to me.

I have two DisplayPort cables, a full size DP to DP, and a full size DP to miniDP. I tried both.

See the attached images that show how this is connected. This shows the method of connection and the resolution/refresh as reported by the monitor. You can also see the monitor is on DP1.2 mode.

Since my previous post I did some more testing.

I bought a Thunderbolt to DP adaptor, and it works at 4k60hz (obviously on the same monitor/computer), which is odd based of you saying the EDID is wrong.

Thanks
Richard
Attached Images
File Type: jpg WP_20180806_12_16_56_Pro_LI.jpg (91.9 KB, 1 views)
File Type: jpg WP_20180806_12_15_43_Pro_LI.jpg (93.9 KB, 1 views)
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Old 08-06-2018, 01:24 PM   #4
AlbanRampon
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Hi again Richard,

It's getting increasingly peculiar then.
The EDID received may be different.

Would you please be able to connect the monitor in a way making it work at 4Kp60 and use a utility to capture the EDID you get?
If so, the utlity I could recommend is DumpEDID.
DumpEDID.exe > c:\temp\edid.txt gives a text file with the output I could look at.
If you need more details on how to run that, do not hesitate to ask.

Kind regards,
Alban
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Old 08-06-2018, 03:01 PM   #5
richard_jones
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Hi,

No problem,

So I reconnected the Thunderbolt to DP adaptor, then DP to DP, 4k60 works.

EDID dump attached, along with a photo of the monitor status.

Thanks
Attached Images
File Type: jpg WP_20180806_15_54_34_Pro_LI.jpg (92.7 KB, 1 views)
Attached Files
File Type: txt EDID.txt (9.6 KB, 1 views)
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Old 08-06-2018, 03:20 PM   #6
richard_jones
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PS,

In case it helps find attached the same report while using Display Link,

Whats odd is that I see the connected has 3840 X 2160 60 Hz!

Active : Yes
Registry Key : DISPLAY\DEL4093\b&b4d5d57&0&UID257
Monitor Name : DELL UP3214Q
Serial Number : K3R904B2288P
Manufacture Week : 45 / 2014
ManufacturerID : 44048 (0xAC10)
ProductID : 16531 (0x4093)
Serial Number (Numeric) : 842545232 (0x32383850)
EDID Version : 1.4
Display Gamma : 2.20
Vertical Frequency : 29 - 75 Hz
Horizontal Frequency : 31 - 140 KHz
Maximum Image Size : 70 X 39 cm (31.5 Inch)
Maximum Resolution : 3840 X 2160
Support Standby Mode : No
Support Suspend Mode : No
Support Low-Power Mode : Yes
Support Default GTF : No
Digital : Yes

Supported Display Modes :
720 X 400 70 Hz
640 X 480 60 Hz
640 X 480 75 Hz
800 X 600 60 Hz
800 X 600 75 Hz
1024 X 768 60 Hz
1024 X 768 75 Hz
1152 X 864 75 Hz
1280 X 800 60 Hz
1280 X 1024 60 Hz
1280 X 1024 75 Hz
1680 X 1050 60 Hz
1600 X 1200 60 Hz
1920 X 1080 60 Hz
1920 X 1200 60 Hz
3840 X 2160 60 Hz
Attached Files
File Type: txt EDID_VIA_DisplayLink.txt (9.6 KB, 0 views)
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Old 08-06-2018, 03:43 PM   #7
AlbanRampon
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Thank you,
You have a different list here...
Supported Display Modes :
720 X 400 70 Hz
640 X 480 60 Hz
640 X 480 75 Hz
800 X 600 60 Hz
800 X 600 75 Hz
1024 X 768 60 Hz
1024 X 768 75 Hz
1152 X 864 75 Hz
1280 X 800 60 Hz
1280 X 1024 60 Hz
1280 X 1024 75 Hz
1680 X 1050 60 Hz
1600 X 1200 60 Hz
1920 X 1080 60 Hz
1920 X 1200 60 Hz
3840 X 2160 60 Hz
There's no 4Kp30 and there's no 2560x1440, most notably.

Looking at this monitor user guide, there's a * about its implementation pages 10 and 11.
* To display 3840 x 2160 at 60 Hz, DP1.2 must be enabled and the DP source’s
graphics card must be DP1.2 certified with MST feature, capable of supporting
resolution up to 3840 x 2160 at 60Hz and its driver supports DisplayID v1.3.
It looks like it is using dual streams to achieve 4Kp60 instead of a single stream, hence why it requires DP1.2 with MST (Multi-Stream Transport). The product is DisplayPort certified, without MST as MST is mostly used to split pixels (daisy chaining displays), not join them up in one panel.
The reason for the different EDID is because of the second part of that sentence: DisplayID. That's a different EDID format.

On page 36, it says it can handle HBR2... That's fast enough to handle a 4Kp60 over a single stream (or it wouldn't be able to handle it across split screens as MST doesn't create any bandwidth).

To sum up, this is unfortunately expected because of the requirements of 4Kp60 for this display don't match what is available on the docking station.

Kind regards,
Alban
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Senior product manager, universal docking stations and accessories
"DisplayLink is proud to be a Synaptics brand."

Where to download the latest DisplayLink drivers
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Old 08-06-2018, 04:57 PM   #8
richard_jones
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Hi Alban,

Thanks, after your previous post I googled some more and found a post on Nvidia, which basically said the same thing about this specific monitor regarding MS.

In any event, thanks for your time.

Regards,
Richard
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