Second Monitor keeps flashing black to try to work out resolution

[techguy1991]

Hi All need to pick your brains.

 

We have the following set up in our classrooms.

 

· HP EliteDesk 800 Mini Desktop (Windows 10 Pro)

· Monitor 1 Connects to a monitor screen on teachers desk (VGA connection)

· Monitor 2 connects to a Iiyama touch screen monitor (used as interactive board) (connection HDMI 1)

Both Screen are normally on duplicate on windows projector mode.

When a member of staff switches logins, Monitor 2 flashes from black to image constantly with the monitor trying to work out resolution.

Monitor 1 shows image as normal and does not flash.

 

When looking at windows projector mode the setting reverts back to PC screen only, however still shows a duplicated mode (i.e. two screen show an image)

The only way to stop this is to turn off the PC.

 

I have update the Intel graphics card and no change. I have three PCs starting to do this fault so not sure why it is growing. I feel this is a Windows / graphic driver issue as this only happens with these computers and nothing else.

Was thinking of a possibly gpo or registry that could force the display to be on duplication and not switch back but am unsure how to do this, any ideas?

 

Many Thanks

[buzzard]

I've seen this, not yet had time to look at yet, it has for us only started recently. I was wondering on a windows update/device driver?

[techguy1991]

yeah was thinking the same thing, we have had this occur in the last month or so.

[robyholmes]

Do you find this happens with Edge open? We did on machines which have a Q35 or Q45 chipset. If you can find the latest driver it'll replace the one Windows try's to install and that seems to solve it.

I have a copy of the Q35 and Q45 driver if you need it, PM me.

[techguy1991]

we only use Chrome and the flashes happens instantly once logged in. no programs are open. Have not tried the chipset update so will give that ago as well thanks.

[Cazab]

Double Check refresh rate? Had a new SMART MX65 in over Christmas and mine kept flickering and not picking up the display from the computer, till I changed the refresh rate from 60hz to 59hz. Connected via HDMI from Dell OptiPlex 5260 All In One.

[dbalaam]

We had this on a HP ProDesk 400 and found and loaded the latest graphics driver (Usesp99918) this fixed are issue

[localzuk]

I've had this happen with a bad cable.