Just to add more info, the system where I'm facing the issued has a dedicated Nvidia card (yup, quite old hardware): sm01@stt008:~$ lspci | grep -i vga 03:00.0 VGA compatible controller: NVIDIA Corporation NV43 [Quadro NVS 440] (rev a2) 04:00.0 VGA compatible controller: NVIDIA Corporation NV43 [Quadro NVS 440] (rev a2)
I have three different systems:
02:00.0 VGA compatible controller: Advanced Micro Devices,
Inc. [AMD/ATI] RV730/M96-XT [Radeon HD 4670]and all three have the same symptoms.
So I suppose the vendor of the VGA is not an issue.
Regards,
Gianluca