Latitude E6440 display blink when connect to external monitor via hdmi to VGA converter

Hi M. Zemmy Indrapatih,

Thanks for your post.

Sorry you are having difficulties with your laptop and monitor.  If you could send me the name and model cable adapter you are using and the name and model of the monitor,  I might be better able to understand the issue.  Thanks

Regards,
Robert

What's the other laptop model? What VGA monitor are you connecting to?

You are best getting a new monitor with HDMI connector.

As you noticed, a HDMI to VGA converter has to convert the digital signal to analog. It may not work with all equipment. 

Hi Robert,

I thought I might jump in here, as I am having the same issues as Zemmy. At work I was issued an e6440, and had the same problem.  The IT department swapped it out with another of the same model, new cables etc... and the problem has not gone away.

Updated windows etc...

It would seem that it is a hardware issue.

Any Insight on how to fix?

B

Hi,

I'm running into the same problem here. VGA seems to work fine but when I use an HDMI for an extended desktop, the Monitor will start flickering on and off. This seems to only happen when the laptop is connected to a charger. 

We are running Latitude e6440s and it is a problem for more than 1 device. 

A solution to this would be greatly appreciated.

Thanks

Dear all

I'm also having a E6440 where the display starts flickering are being in use for some minutes. It only happen if I connect via HDMI and it happens on two different displays.

Have you tried adapting hdmi to dvi. I haven't tried this yet but don't want to spend the $$$'s if it doesnt solve the problem.

Thanks for the hint to use HDMI (laptop) to DVI (display) adapter. It works neither. Yesterday Dell changed my motherboard. Still the same issue.

Hey All,

I've noted something that seems to work pretty well.

• The HDMI output blinks when the laptop is fully charged, with the AC power plugged in.
• Unplug the AC adapter, and the display stops blinking.
• When the battery is drained, & AC is plugged in, the screen does not blink.
• When the battery is fully charged, the display begins to blink again....

I've been able to use this as an interim solution, (unplugging the power from the back of the machine, and plugging it back in back in a few times during the day)... until Dell figures it out.

To add to this, another interim solution is to remove the battery from the laptop if you can leave the laptop plugged in all the time.  I wish Dell would figure this out.  I manage 14 of these machines.  

Gentlemen, any news on the subject?...  Is DELL pursuing this annoying and nasty issue?...

I have to constantly unplug and plug the power into the laptop to avoid flickering issues with an HDMI monitor.  Is there some sort of utility to limit the battery from charging to a 100%?...  I mean, if the battery stayed at 98% charge, the problem would be solved...

Anyone there listening?...

Think I Got It...

Download from DELL the DELL Command Power Manager.  Run. Under Battery Information > Settings, chose Primarily AC Use...

And the battery never charges fully, so you never see 100% and the flickering stops :)

This is my Power Management screen but I am confused as to what I am setting

Dell 6440:

• Bios A13,
• Intel(R) HD Graphics 4600,
• AMD Radeon HD 8690M.

This solutions can'l solve problem in a general case.

Change charge mode and in this work day - all ok. OFF notebook and in a few hours later ON it for work - and HDMI connection with problems again.

Some test cases:

• Primarily AC Use: problem
• Custom mode: 50% start ...90% stop charge (~70% charged level) - problem
• Express mode: problem

Some correlation from time after ON:

• ~ 1....15 min - often (up 3..5 mins between re-connection HDMI)
• ~ 15.....30 min - rare (up to 10 mins between re-connections)
• In charging state (while charge lelev less than 100% ) - no problem, after 100% - again problem