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White square error

Graphics issues like: bad framerates, weird colors, OpenGL errors etc. Bad graphics ar usually the result of bad graphics cards or drivers.
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- what OS (Windows Xp/Vista, Mac etc.) are you running?
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- what graphics card do you have?
- does the problem occur with any aircraft, at any airport?
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White square error

Postby RenanMsV » Fri Jan 27, 2017 5:51 pm

My friend is having this error while simulating on FG
He is having this error in Flightgear 2.12 and 2016.1.1
But 2.4 works.

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Re: White square error

Postby wkitty42 » Sun Jan 29, 2017 8:05 pm

see the pink box at the top of this area? we need the information it requests...

what is your friend doing to bring that box up?
have they tried 2016.4.4?
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"Why not?" said Gurder.
"Dunno. It's frightened of heights, I guess."
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Re: White square error

Postby Thorsten » Mon Jan 30, 2017 6:14 am

I guess the first thing to understand is - is this box a window/dialog box that happens to be shown white for some reason, or is it an artifact in the framebuffer (i.e. there's nothing FG tries to put there).

Both are likely in some way related to the graphics driver, though the first is probably manageable by trying different GUI styles/rendering quality settings. If it's the second crossing fingers and updating graphics drivers is all I can think of.
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Re: White square error

Postby zakalawe » Mon Jan 30, 2017 6:48 am

The white square is the popup message / tooltip, shown via the Canvas. The texture or framebuffer used for the canvas isn't working. This seems to happen on some very old drivers.
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Re: White square error

Postby Hooray » Sat Feb 25, 2017 1:37 pm

The last comment is spot-on, we talked about this issue a (long) while ago - and what would really be interesting is if people seeing this could also try one of the aircraft using other OD_gauge based avionics (navdisplay, agradar, wxradar etc) - because under the hood, this should be using the same OSG code - if those instruments work/display properly, it is likely that this issue can be fixed once and for all by looking at what the Canvas FBO/RTT setup code is doing differently compared to od_gauge based avionics using the same back-end.

If I remember correctly, we also once posted patches telling OSG to use a non-FBO fallback - unfortunately nobody seeing this issue was able to follow up to test this.

If in doubt, anybody seeing this, PLEASE post a screenshot showing your help/about dialog (and ideally your fgfs.log file): ... s#fgfs.log

PS: Likewise, this should affect any other FBO use-cases in FlightGear, including multi-camera setups (think Rembrandt)
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