Thanks for joining the community.
I understand you have multi monitor configuration but resets no matter of the video cable you try.
At this stage, let’s check if you already tried with the latest video drivers available here:
Please filter by operating system version and try to install the driver when it finishes downloading, to verify that your system will accept it.
@ Baxik, Have you tried the latest drivers provided by Dell? With Switchable Graphics systems is is very important to use the drivers provided by the system OEM as they may have various customizations specific to that system. When installing graphics drivers on a Switchable Graphics system, be sure to install the Intel HD Graphics drivers first and then install the AMD drivers. I would also check to make sure you have the latest SBIOS they have available for the M4800.
Also, have you contacted Dell about the issue? They may be aware of the issue and have a resolution.
For the M4800 drivers:
Thank you a lot for the information.
@Allan - I tried the drivers from the link you gave me, selected right OS etc. but it says, supplied, but I get an error about incompatibility of the driver with the manufacturer (probably dell has made some changes to the original one), but thank you anyway.
@Robert - Last week I sent the ticket to Dell as well and waiting for their answer. So far, I was using Dell system update utility which downloaded the latest video driver of the same version you provided me the link for (both versions are 10.18.10.3277). Nevertheless, I downloaded the driver manually from the link you provided me and after restarting it seems to be working.
However, I had this state before that it worked for a few days and then it started doing the same mess. I will test it till the end of the week and update you then. Hopefully this is the solution and the problem was to perform the update over that Dell update utility.
Thank you very much for your help and I will let you know at the end of the week (and mark the answer).
Today, after resuming of the notebook from a sleep state I had a screen blink and it does again the same. Whenever I try to do any setup to the video, it is applied but after aprox. 3 seconds the settings is reset again to the default so I am unable to change anything in the display settings again.
I am also still waiting for the response from DELL support.
If you have any further ideas, i would appreciate them very much.