Integrated Intel HD 4400 Graphics hardware until now was unusable on Linux, see https://github.com/NicolasGuilloux/blade-shadow-beta/issues/12 or https://blade-de.zendesk.com/hc/de/articles/360011067120-Bekannte-Fehler-im-Linux-Client#h_01EC5DX63WJMSNG7FCXRK10ECB.
This still is not solved with client 3.7.5, but at least you can now switch to the new software rendering, which imo is a very acceptable workaround. Finally I can use my old HP Probook 430 G1.
Regards,
Heinz