Thank you. We will do a vnc session tomorrow on affected systems. Let's hope, we find the issue.
Same on Windows with similar hardware:
Lenovo Thinkpad t410s (14-inch notebook, early 2010) - Windows 10 Pro
Model Name: Lenovo Thinkpad t410s
System Manufacturer: LENOVO
System Model: 2912W1C
System Type: x64-based PC
Processor: Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz, 2400 Mhz, 2 Core(s), 4 Logical Processor(s)
BIOS Version/Date: LENOVO 6UET70WW (1.50 ), 11.10.2012
SMBIOS Version: 2.6
Installed Physical Memory (RAM): 8,00 GB
Total Physical Memory: 7,80 GB
OS Name: Microsoft Windows 10 Pro
OS Version: 10.0.15063 Build 15063
Graphics & Display
Name: Intel(R) HD Graphics
Adapter Type: Intel(R) HD Graphics (Core i5), Intel Corporation compatible
Adapter RAM: (344.109.056) bytes
Resolution: 1440 x 900 x 49 hertz
Bits/Pixel: 32