LibreOffice with fglrx drivers doesn't work properly

I’m a Xubuntu user, and this is my fglrxinfo output:

display: :0.0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Mobility Radeon HD 5000 Series
OpenGL version string: 4.3.12798 Compatibility Profile Context 13.35.1005

I installed proprietary drivers for gaming, and I wouldn’t remove them. The point is that since I’ve installed GPU proprietary drivers, LibreOffice has become totally unusable: disabling both hardware acceleration and antialiasing didn’t helped, the UI is still lagging as I’m on an oldie 486SX.

I am using LibreOffice 420m0(Build:2)

Is known any tweak or trick I can do to fix this problem ?

Thank you

Someone else using Xubuntu was having similar problems with their proprietary drivers and installing libreoffice-gtk and/or libreoffice-gnome and that solved it for them.