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I've an issue with some of the programs, packettracer among them, having a zoomed in feel to them and it is eating up screen real estate. Unfortunately I have no idea how to switch to default nor what exactly caused it.

From picture below the icons are bigger than usual, even pixelated. I maximized window to show the extent of it (close, minimize and maximize buttons are visible once mouse is hovering at the menu bar).

Here's an example of what I see: https://imgur.com/a/OibeQ

Compared to what it should look like: https://i.ytimg.com/vi/ll7hB-DitZ0/maxresdefault.jpg

Please ignore the launcher size --- it is irrelevant to the problem.

Program in question, packettracer was downloaded from here and installed from command line. Running Ubuntu 16.04.3 LTS with 1920x1080 resolution

Any help is greatly appreciated!

Edit: wording

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    Is this a HiDPI system?
    – muru
    Jan 18, 2018 at 5:23
  • 96 dpi, not HiDPI, if I'm not wront
    – krg
    Jan 18, 2018 at 6:35

3 Answers 3

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Also had this issue recently where the icons in packet tracer were over zoomed and pixelated when running in 1920x1080 (only looked right running at 1600x900).

I believe your issue is due to the environment variable, 'QT_DEVICE_PIXEL_RATIO=auto' being set in /etc/profile during installation of packet tracer. When running 'env | grep QT_DEVICE_PIXEL_RATIO' the variable was set at 2.

For me, commenting this out and rebooting resolved the issue.

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  • Thanks for the input, wills117!
    – krg
    Nov 26, 2018 at 21:51
  • Issue persisted on 18.10. Changing the QT_DEVICE_PIXEL_RATIO to 1 and reboot fixed the issue for me. Also, on Cisco Packet Tracer 7.2 libpng12 library is missing, which can be downloaded from here.
    – krg
    Nov 26, 2018 at 22:00
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Might be a DPI issue as @muru pointed out. Thank you, btw. When resolution is changed to 1600x900 everything is OK and bigger (better for the eyes)

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Had the problem that QT_DEVICE_PIXEL_RATIO resets to auto after reboot. This can be fixed by going to the /home/user and adding the line QT_DEVICE_PIXEL_RATIO=1 to the file .bashrc

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