bob prohaska  wrote:
>
> That hit pay dirt, revealing the line
> Exec=chromium-browser %U
>
> It therefore appears I want something like
> Exec= MESA_EXTENSION_OVERRIDE=-GL_MESA_framebuffer_flip_y chromium-browser %U

There's still a fly in the ointment. Editing
/usr/share/applications/chromium-browser.desktop
to contain the line
Exec=MESA_EXTENSION_OVERRIDE=-GL_MESA_framebuffer_flip_y chromium-browser %U
chromium still inverts the map at
https://www.fire.ca.gov/incidents/

However, if I use the line
MESA_EXTENSION_OVERRIDE=-GL_MESA_framebuffer_flip_y chromium-browser
in a terminal window to start the browser, the map displays correctly.

Just in casse it's relevant, I'm using the default unaccelerated
video driver, if that matters. I tried the "experimental GL driver"
and the machine locked up hard with chromium running if the machine
went into power save move. Only way to unstick it was pulling the plug.
Just for clarity, this is a Pi3B+, _not_ a Pi4

Any suggestions welcome!

bob prohaska
.

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