This message was posted on behalf of Intel Corporation
lister.of.smeg: Thank you very much for contacting the Intel® Graphics communities. We are sorry to hear the computer is not working properly.
In order to try to fix this problem, we recommend to install the graphics drivers provided by the manufacturer of the computer.
If the problem persists after that, since the system is working with Intel® HD 4000 graphics, we can try to install driver 4425, it is older than the driver the computer currently has installed but it will let us know if the problem could be related to a regression bug:
What is the model of the motherboard?
What is the model of the processor?
If this is a laptop, what is the model of the laptop?
Did you make any recent hardware/software changes?
Any questions, please let me know.
Hi Alberto R
I uninstalled the driver, rebooted and then reinstalled the same driver. That does seem to have fixed it because I am no longer getting the same problems now.
Previously, I did not notice the problem because I could not use standby due to a PSU problem which tended to cause instability when returning from standby. I purchased a new Seasonic PSU which works properly so I was able to use Standby. That was when the problems showed themselves.
It is a desktop motherboard, Asus P8Z77-V Premium
Intel i7-3770K CPU
No hardware changes but I had installed a number of items of software. Not using standby prior to the new PSU meant I would not of seen any problem.
For now it seems to be solved.