Maybe this helps:

Some of my students had problems with a black or green gui window.

One of them had two graphic processors on the system (probably one inside the CPU and another on an external graphics card).

After explicitly disabling one of them, the SUMO GUI and netedit worked as it should.

Best,

Joerg

On 21/12/20 11:59, Jakob Erdmann wrote:
- do you have cpu-load while the screen is black?
- is there any effect by network size on black-screen-time?
- what is the output of calling 'sumo' on the command line? (or c:\
your\path\to\bin\sumo if the bin folder is not found automatically)

Am Sa., 19. Dez. 2020 um 17:34 Uhr schrieb John Doggett <[email protected] <mailto:[email protected]>>:

    Jacob,

    Attached is my net.xml file. I tried v1.7.0 same problem results.
    Also I now get the problem on the quickstart tutorial. Also I get
    a repeat of the MS error I sent you last as the 64 bit version
    gets loaded into the Program(86) folder. If I move it to and
    execute from the Program folder it comes up fine, loads the
    network and then goes black for about 4 mins and eventually the
    network appears and can be edited.

    Regards,

    John

    On 12/19/2020 6:04 AM, Jakob Erdmann wrote:
    - Please provide the smallest network that triggers the error for you
    - Can you check whether the problem differs when using different
    sumo versions? (1.8.0, 1.7.0, 1.6.0)?

    Am Sa., 19. Dez. 2020 um 00:17 Uhr schrieb John
    <[email protected] <mailto:[email protected]>>:

        Weronika,
        Yes the tutorial networks loaded quickly, no problem. But all
        my old nets and sims take 4 mins to load.
        Regards,
        John

        Sent from my iPad

        On Dec 18, 2020, at 4:35 PM, Weronika
        <[email protected] <mailto:[email protected]>>
        wrote:

        
        Hi,
        I just wanted to write my own email, but I saw this one. I
        think the issue which I am facing today can be connected.
        Does any network work for you John? For example like Jakob
        suggested the documentation examples.

        For me I can see the black screen in sumo-gui and also
        netedit, even if I load an easy example from the documentation.
        A few days ago it all worked good, I didn't change anything
        and today is black. (if I make the window smaller then it
        gets green)
        If I load the whole simulation in sumo-gui then the whole
        action seems to take part, but with a black screen.

        I tried on different SUMO versions (one from today and one
        which worked for me before) and with the same result.
        I run  'sumo -n yournet.net.xml -v' and 'netconvert -s
        yournet.net.xml -v' in the console and it runs correctly

        I will try with graphics drivers, but the weird thing that
        everything was fine a few days ago....
        <Zrzut ekranu 2020-12-18 o 19.02.32 1.png>

        <Zrzut ekranu 2020-12-18 o 19.02.35.png>


        best,
        Weronika

        pt., 18 gru 2020 o 21:22 Jakob Erdmann
        <[email protected] <mailto:[email protected]>>
        napisał(a):

            Your issue is unexpected as we routinely load old
            networks on Win10 PCs.
            What were those "many Win10" errors you encountered?
            Things to try:
            - updating graphics drivers
            - try running 'sumo -n yournet.net.xml -v' and
            'netconvert -s yournet.net.xml -v'
            - load a network from the documentation examples

            regards,
            Jakob


            Am Fr., 18. Dez. 2020 um 20:00 Uhr schrieb John Doggett
            <[email protected] <mailto:[email protected]>>:

                I developed many simulations in SUMO three years ago
                and have now just
                started a new project. So I downloaded the latest
                version. After many
                Win10 errors I have got a Netedit window up. When I
                load a network that
                I have just completed in the old version it seems to
                load and then the
                window goes completely black and the app hangs. The
                same is true of
                running the GUI. The last simulation I have loads
                then blank black screen.

                Any advice?

                John

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