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23338
November 6th, 2017 10:00
Monitor turns on and off on multiscreen mode
Hi everybody.
I've a latitude e5450 Intel I5 with graphics Intel 5500.
My laptop is connected with 3 monitors, using a docking station (an old advanced DELL e-replicator).
In 3-screen mode, one monitor, that one connected in HDMI often turns off and on, even now I'm writing. The others are vga and e-port.
I'm quite sure it's not monitor's fault, because in one-screen mode it doesn't happen.
The frequency is the same for all 3 monitors.
Can you help me please?
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robert p
4 Operator
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9.4K Posts
0
November 7th, 2017 06:00
Hi Freakapotamus,
Thanks for posting.
Apologies that your system is not running as expected. Here is some information from the Dell knowledge base you may find helpful: http://dell.to/2zowfSK
jphughan
9 Legend
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14K Posts
1
November 7th, 2017 06:00
We had this issue on a bunch of E5550s and the fix was to update the firmware on the built-in DisplayPort MST hub, which handles outputs to the dock, including to non-DisplayPort connectors. This is the update, and you have to install it while connected to the dock and having at least one dock-connected display active: www.dell.com/.../driversdetails
Freakapotamus
2 Posts
0
November 7th, 2017 09:00
thanks a lot.
First i noticed that one screen was in a different frequency, 59hz instead of 60.
I corrected it and seems it was good but not enough. Then I've restarted, installed this update you suggested, restarted again and now seems alright. Hope I've solved
jphughan
9 Legend
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14K Posts
0
November 7th, 2017 12:00
Yeah, technically 60 Hz is actually 59.94 Hz or something like that, and some display drivers list both options. I'm not sure there's actually a difference, but hopefully you're good to go!