Looking for advice about non-functioning Numpad keys in Qt 5.12.6

[Paul Miller]

Hello all -

I build Qt 5.12.6 from source, on Centos 7, and am having an issue where
the numeric keypad number keys always report Home/End/PgUp/PgDown
regardless if whether numeric lock is on or off.

Some searches indicate this has to do with missing xcb dev libs during
Qt build, but I have all the dependencies specified on the Qt build site.

Has anyone else run into this issue and possibly have a solution?

Cheers,

-Paul

[Charles Fleche]

What does the configure log look like?

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[Paul Miller]

Sure - here you go. I attached the summary and the log.

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[Charles Fleche]

Really not an X11 expert here, but would it be because your Qt build does not link against the system XCB at Runtime ?

Using system-provided XCB libraries .. no
XCB XKB .............................. no

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[Paul Miller]

Yeah, plausible. I'm using default build options, so I don't know what it's not finding that is preventing it from finding what it needs for the system xcb stuff.

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[Charles Fleche]

I think the option is `--system-xcb`, vs the default `--qt-xcb`

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[Paul Miller]

Ah, yes I remember seeing this error when using -system-xcb:

ERROR: Feature 'system-xcb' was enabled, but the pre-condition 'features.xcb && tests.xcb_syslibs' failed.

In the config.tests dir, the "xcb" test runs without error, but the "xcb_xlib" and "xcb_glx" tests core dump.

It seems I have all the necessary dependencies installed, so I don't know why these tests are failing.

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[Charles Fleche]

Not sure why. I've been compiling Qt recently on CentOS 7.4.1708 with devtoolset-6 (GCC 6.1) and it did work. I'll check if I get the same Numpad key error.

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[Paul Miller]

That's exactly the setup I'm building on as well. Thanks for checking!

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