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Paper Tape
Posts: 3
Registered: ‎03-07-2017
Location: DK
Message 1 of 4 (161 Views)

ThinkVision Pro2820 auto dimming problem

[ Edited ]

Hi,

 

Our company has just received a batch of ThinkVision Pro2820's. We are however having issues with the monitors auto-dim function - we can't find out how to disable it. The work of me and my colleagues involves shifting between a lot of different applications and windows. With the auto dim function enabled this results in the brightness level constantly changing up and down which is an absolute pain to look at.

 

I've looked around and haven't been able to find a solution. I've seen dpeleg's thread (here) on the forums with what sounds like the exact same problem on another model. The answer supplied here does not work for us, nor does it seem like it solved his/her problem.

 

I've tried setting the monitors brightness level to 99 out of 100 (kinda the solution provided in the thread in the link) but that does nothing. I've also disabled adaptive brightness in the advanced power settings of the computer. None of the above work. I haven't been able to find any official documentation to this issue.

 

Thanks in advance for any help.

Bit Torrent
Posts: 1,085
Registered: ‎12-11-2015
Location: United States
Message 2 of 4 (139 Views)

Re: ThinkVision Pro2820 auto dimming problem

You might try first backing up the registry hive shown below on one of the affected systems, and then try importing the following registry settings to see if it helps.   A reboot is required to test whether it works or not.  

 

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ ContrOl \ Class \ {4d36e968-e325-11ce-bfc1-08002be10318} \ 00 00]

"Dpst6_3ApplyExtraDimming" = dword: 00000000
"DCUserPreferencePolicy" = dword: 00020000
"ACUserPreferencePolicy" = dword: 00020000
"PowerDcPolicy" = dword: 60564054
"PowerAcPolicy" = dword: 60566054

 

Good Luck,

Paper Tape
Posts: 3
Registered: ‎03-07-2017
Location: DK
Message 3 of 4 (123 Views)

Re: ThinkVision Pro2820 auto dimming problem

Hi JDGillis,

 

Thanks for the reply. Unfortunately, it did not work, there's no difference. I am not sure how a regedit echange could make a change since the issue is entirely related to the monitors?

 

BR

Anders

Paper Tape
Posts: 3
Registered: ‎03-07-2017
Location: DK
Message 4 of 4 (69 Views)

Re: ThinkVision Pro2820 auto dimming problem

No one else with any suggestions? Still also waiting to hear from a Lenovo employee about this.

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