failed to initialize XrandR

hei6775

I am develop my application in Ubuntu(without display) with QT5.15.2
But when i click the Run. The Qt Creator build fail and tell me:

qt.qpa.xcb: failed to initialize XRandr
qt.qpa.xcb: XKeyboard extension not present on the X server

By the way, I am using xrdp to operate the remote server. I try many methods, but they not work for me. What should I do? Give me advise.

coonal

Hi @hei6775 ,
any luck on this? Were you able to find any solution? I am getting the same issue.

raven-worx

@coonal
just a shot in the dark:
If its a QML application try to run the Qt app with SW renderer and not OpenGL backend
(e.g. via env var: QT_QUICK_BACKEND="software")

brookbot

@raven-worx said in failed to initialize XrandR:

QT_QUICK_BACKEND="software"

That did not work. I continue to see this error w/PyQt5 on RHEL8:
qt.qpa.xcb: failed to initialize XRandr
qt.qpa.xcb: X server does not support XInput 2
qt.qpa.xcb: QXcbConnection: XCB error: 1 (BadRequest), sequence: 169, resource id: 53, major code: 131 (Unknown), minor code: 47

JKSH

@brookbot said in failed to initialize XrandR:

qt.qpa.xcb: failed to initialize XRandr

What does xrandr -q show you?