Unsolved Memory overflow with QT 5.1X and Intel GPU graphic

[Norbert]

Hello everyone,

We actually use QT 5.1X on Intel NUC with

• Intel(R) Core(TM) i7-8559U CPU @ 2.70GHz

• Intel(R) HD Graphics (Coffeelake 3x8 GT3)

• OpenGL ES 3.2 Mesa 17.2.3

The app display pictures using QML image: and QQuickImageProvider on 2 windows.
We are currently experiencing a big problem of memory consumption.(All memory is consume)

Has anyone ever encountered this problem with the Intel HD Graphics ?

Your help is really welcome !
Thanks !

[SGaist]

Hi,

Qt 5.1X is a bit vague, what exact version are you using ?
Can you show the code you are using ?
Did you try updating/downgrading your graphic card driver ?

[Norbert]

Hello, the versions :

Version : QT 5.10.1-0-201802092256
CentOS Linux release 7.5.1804
OpenGL version string: 3.0 Mesa 17.2.3
00:02.0 VGA compatible controller: Intel Corporation Device 3ea5 (rev 01)

OpenGL and Intel GPU seems to be strongly linked.
The intel driver goes with the Centos version.

[SGaist]

Can you check whether you have the same phenomenon with a more recent version of Qt ? And if not, with an older one ?

[Norbert]

Hello,

We have same problem with QT 5.8, Qt 5.11.0, QT5.11.1 in 2 screens and 2 windows

With 1 screen and 1 windows not problem.

[SGaist]

Is it not a problem or is the leak taking way longer to eat all the memory ?

[Norbert]

It is a big problem.
On2 screens only, each time a image is updated the memory is consume and not freed.
After 1 minutes 32 Go of mem are consume and after the swap and computer can not run.

[SGaist]

What I meant was: is it really "not a problem" with only 1 screen and 1 window or is it just the memory leak that is way slower in that setup ?

[Norbert]

With only 1 screen and 1 windows we don't see memory leak.