Details
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Bug
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Resolution: Done
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P1: Critical
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5.4.0
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None
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Ubuntu 14.04
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f64b87a5df8870be138dbf3febad950e1fc4ed8c
Description
Easiest to reproduce with a dual monitor Xinerama setup with one 4K monitor: Using any widget-based application, try to resize the window to cover both screens.
It crashes after a warning of the type "QXcbShmImage: shmget() failed (22) for size 35101960 (4159x2110)".
The problem is that we are trying to allocate a backingstore that is bigger than the maximum shared memory size on Linux.