Display brightness issue with Win 10 on W520

[jdwis]

Hi

I have updated to Win 10 on W520
The brightness level varies from level 1 (low) - 10 (highest)

At level 2 it is too low and increasing to 3 its just too bright, the level does not increase gradually as it used to be in Win-7

No matter what you do it just doesnt help

I tried various utilities Intel/Lenovo Power Management programs - didnt help (actually there is none for Win-10, I tried from Win-7)
Some other available programs from internet - which just didnt work
Also made sure the Display driver is updated to latest ver.

Display - NVIDIA Quadro 1000M
Driver ver - 21.21.13.7755 (2017-07-13)
NVIDIA Control Panel Prog - 8.1.1070.0
Ver - 377.55

Nothing I could find which would help increase / decrease brightness gradually, nicely, like Win-7

Can anything be done ?

Thanks in advance guys

[RealBlackStuff]

What happens if you use Fn-Home (brighter) or Fn-End (dimmer)?

[ZaZ]

Does going from three to four or eight to nine produce the same large increases in brightness? You might want to boot it to Linux, which you can do via a USB or optical drive. You won't need to install it, but can test whether it produces the same results.

[jdwis]

What happens if you use Fn-Home (brighter) or Fn-End (dimmer)?

Yes, I change brightness via these keys only Fn + Home or End and it does change brightness (brighter and dimmer)

Does going from three to four or eight to nine produce the same large increases in brightness? You might want to boot it to Linux, which you can do via a USB or optical drive. You won't need to install it, but can test whether it produces the same results.

Going from 3 to 4 brightness changes, its more brighter on 4 than 3
Changing from 8 to 9 also changes the brightness, its brighter than its previous value 4

I have Linux as secondary OS, changing brightness there is no problem, it all changes gradually and nicely, in little values, which does not hurt your eyes - Linux - all good

In Win-10 (since updated from 7) the brightness is actually too high at even value of 2 and at 1 it goes quite a bit low (of course readable but u have to squint)

The increase in values from 1-2-3-4 etc I believe should be in very little fractions rather then large chunks.

Just now reading some threads on some other forums, someone tried to change the display properties in BIOS
I tried changing it, experimented to 2 different values "Discreet" and then later "Integrated"
Discreet - did not help and system hung and reverted back to NVIDIA automatically
Integrated - remained, and changed display to "Intel HD graphics 3000" - for which I tried installing new drivers etc, but things didnt work out well as I could not then use External monitor, and eventually I had to revert back to NVIDIA

[jdwis]

Has anyone come across similar or suggest anything on what to do for gradual increase in brightness rather than big chunky increase from level 1 ?