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No 2560x1440 via HDMI on recent Kaby Lake notebook

MMuel7
Beginner
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Hi all,

I just tried to attach my brand new Panasonic CF-SZ6, i5 7200U, HD620 (Japanese model) to my ASUS PB328, 2560x1440p capable LCD.

My notebook only recognizes the LCD as a "Digital Television (which it is not) PB328" and a maximum resolution of 1920x1080p60Hz.

What I tried so far:

1. Installed two drivers from the manufacturer 21.20.16.4550 and 21.20.16.4727 -> no change

2. After some messing around (wouldn't let me install a generic Intel driver) I installed 22.20.16.4771 from Intel's website -> no change

Nothing so far, still 1080p only.

Then I tried this:

3. Booted a Fedora 26 live image -> success (full 2560x1440p60Hz out of the box)

4. Set up a custom resolution in the Intel driver -> success (although I get a warning about "exceeding the maximum bandwidth")

5. Tried a different HDMI cable -> no change

6. Tried a different notebook (Dell E5470) via HDMI -> success

I know, the custom resolution actually works, but I still wonder why it wouldn't work out of the box. I'd appreciate any help.

Thank you.

SF6

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Stefan3D
Honored Contributor II
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Set up a custom resolution in the Intel driver -> success (although I get a warning about "exceeding the maximum bandwidth")

...

 

I know, the custom resolution actually works, but I still wonder why it wouldn't work out of the box. I'd appreciate any help.

Try with and without https://www.asus.com/de/Commercial-Monitors/PB328Q/HelpDesk_Download/ ASUS MultiFrame Software

Don't know if it contains a monitor driver.

Probably the special modes described on manual's last page of your monitor confuse the Panasonic BIOS (1920x1200 Reduced Blanking and 2560x1440@75Hz) ?

Otherwise try with and without http://pc-dl.panasonic.co.jp/dl/search?q=sz6&button=&dc%5B%5D=&p1=&p2=&oc=&lang= custom software offered by Panasonic

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