Cant set dual 4k monitors Raspberry Pi 4

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jeremy
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Joined: Fri Aug 16, 2019 4:16 am

Cant set dual 4k monitors Raspberry Pi 4

Post by jeremy » Sat Aug 17, 2019 3:22 am

I can set a single monitor to 4k60 with hdmi_enable_4kp60=1 but this mode doesnt work for dual monitors. The pi 4 can only support 4k30 for dual monitors.

On raspian it auto detects the 4k monitors and sets it to 4k30, I cant for the life of me find a way to set it in the config file for this mode using WTware.

akatik
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Re: Cant set dual 4k monitors Raspberry Pi 4

Post by akatik » Sat Aug 17, 2019 10:13 am

Hello,Send me your terminal log to support@wtware.com
Here's the manual about making logs: http://wtware.com/logs.html

jeremy
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Joined: Fri Aug 16, 2019 4:16 am

Re: Cant set dual 4k monitors Raspberry Pi 4

Post by jeremy » Sat Aug 17, 2019 6:28 pm

Log sent.

cwt
Posts: 6
Joined: Wed Aug 21, 2019 9:26 am

Re: Cant set dual 4k monitors Raspberry Pi 4

Post by cwt » Wed Aug 21, 2019 9:44 am

I have a similar problem with 2x DELL 24" monitors running at 1920x1200px. Only one monitor shows a picture, the second one has a signal (backlight is enabled and the status LED is "white") but shows nothing.

Raspberry Pi4B, 1GB RAM

RPi config entry:

[HDMI:0]
hdmi_group=2
hdmi_mode=69
[HDMI:1]
hdmi_group=2
hdmi_mode=69

akatik
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Re: Cant set dual 4k monitors Raspberry Pi 4

Post by akatik » Wed Aug 21, 2019 1:37 pm

The same question: do these two monitors run in Raspbian? If so, send me your config.txt from Raspbian SD.

Also, run in Raspbian command line:

dmesg > /tmp/dmesg.txt

and send me file /tmp/dmesg.txt

cwt
Posts: 6
Joined: Wed Aug 21, 2019 9:26 am

Re: Cant set dual 4k monitors Raspberry Pi 4

Post by cwt » Wed Oct 16, 2019 11:13 am

I found a solution for my problem.

Added this entry within WTWARE config menu to my Raspberry config.txt:

Code: Select all

core_freq_min=500
Save the file and reboot. When the login to RDP window appears both monitors are used correctly.

ysammy8
Posts: 5
Joined: Wed Nov 27, 2019 6:18 pm

Re: Cant set dual 4k monitors Raspberry Pi 4

Post by ysammy8 » Mon Dec 02, 2019 1:05 pm

Hi cwt

What model monitor do you use?

cwt
Posts: 6
Joined: Wed Aug 21, 2019 9:26 am

Re: Cant set dual 4k monitors Raspberry Pi 4

Post by cwt » Fri Dec 06, 2019 7:47 pm

ysammy8 wrote:
Mon Dec 02, 2019 1:05 pm
Hi cwt

What model monitor do you use?
I use DELL U2415 monitors with direct HDMI connections.

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