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20 Posts
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6184133
Can't adjust brightness after installing Windows 10
Hello. I Have a Dell XPS 15 L521X. Recently updated to Windows 10 and I can no longer adjust my brightness up or down.
Right now the display is pretty dim. I would guess about 30% - 40% brightness. In Widows 10 I found about 5 different places to adjust your brightness and I made sure all of them were set to 100%. I have my power plan set to high performance and I went into the advanced settings and turned off adaptive brightness and made sure both display brightness & dimmed display brightness are both set to 100% on battery and plugged in. Rebooted and still dim.
My question is, on Dell laptops, should Windows have full access to control brightness? Or does Dell override Windows with their custom software for display settings? When I bought this laptop in 2012, the software, at the time, was called Dell QuickSet. Is that the application responsible for controlling screen brightness? And is it required?
Thank you,
Mike
Aqxea
12 Posts
0
August 25th, 2015 12:00
That worked for me as well Andy, but I hope this is just a work around until Dell gets it sorted out. I should be able to adjust brightness and keep legacy boot disabled.
vivek.j.kumar
2 Posts
1
September 3rd, 2015 11:00
Hi Kilotsky,
I will share in this forum how I was helped in configuring the Brightness.
Open Device Manager ---> Monitors ----> Generic PnP Monitors
This will be disabled. Enable this by right clicking on the icon. You should be able to change the device brightness using the Fn+F4 and Fn+F5 keys. Also, if you click on the battery icon, you should be able to adjust the brightness from there.
Do let us know if you are still facing the issue.
Thanks,
Vivek
R.Neff
8 Posts
0
September 3rd, 2015 20:00
I do not know who is training your staff. But Function Key + F4 and F5 is volume control on almost ALL LAPTOPS now and the brightness is actually F9 and F10 usually.
You need to go back into training as you are not fit to work that position.
vivek.j.kumar
2 Posts
1
September 3rd, 2015 23:00
Hello Neff,
I am not from customer support of Dell or neither am any staff for customer support. I myself own a Dell Inspiron 15 R 2012 version laptop. I found the solution for brightness control online and it worked for me (as unfortunately my laptop has F4 and F5 key for brightness control). Therefore thought to update the same in this forum as well, as I came looking for the solution in this forum first.
I just put up a solution in this forum based on my experience to help.
mcteam
2 Posts
0
September 4th, 2015 00:00
Hi Neff,
Aren't you too hars in your judgement?
Cause at workshop we have some new and old laptops, the brightness is located under F4 And F5.
On my personal laptop (bought last year) is als on F4 / F5
JordanKrazy
1 Message
1
September 22nd, 2015 17:00
I was having the same problem and updating the driver fixed it. I can finally change my brightness now. Thank you so much! :emotion-2:
drisb
1 Message
1
September 24th, 2015 10:00
Thank you very much. I had this issue when upgrading from Windows 8 to 8.1 but simply by reinstalling the previous driver version for intel graphics hd 4000, i was able to recover the adjusting level function; however, since the windows 10 upgrade, i could not find anymore the previous driver version, so I tried many attempts by reinstalling different drivers from intel, dell, and windows... but nothing worked. I can confirm that for my case, XPS 15 L521x, changing the BIOS settings as you explained solved my problem. Now everything works perfectly. Thank you
mike10370
20 Posts
0
September 25th, 2015 04:00
It's still not working for me unless I turn on Legacy boot. I would prefer to not have to do that. XPS 15 L521X
stevec1980
2 Posts
0
September 29th, 2015 04:00
I too have this problem on my XPS 15 L521x. The maximum screen brightness is killing my battery life when I'm not plugged in.
I have tries all suggested solutions on this post, but none have worked for me. Please keep me updated if a definitive solution is found(probably in the form of a driver update from Dell).
Cheers,
Steve
stevec1980
2 Posts
0
October 30th, 2015 07:00
This fix worked for me, thanks!
mike10370
20 Posts
0
October 30th, 2015 07:00
Sounds promising. I will try this fix today and report back. Thank you WARRENMC81.
mike10370
20 Posts
0
October 31st, 2015 15:00
I have multiple "FeatureTestControl" keys. Which one do I edit?
WarrenMC81
3 Posts
0
November 3rd, 2015 21:00
I did all of them - Think is was becasue of all the multiple driver files I had tried that there were so many instances... worked ;-)
WarrenMC81
3 Posts
0
November 3rd, 2015 22:00
I made a Few Edits to my Original Post ;-)
mike10370
20 Posts
0
November 4th, 2015 13:00
Thank you guys. I really appreciate it. I only edited the first registry key and after a reboot my Fn + F4 & F5 brightness controls started working so I stopped there. I don't know if it will make any difference if I go back and edit the rest of them, but I think I will to see if I notice a difference. Just be sure to back up your registry before making any changes.