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2 Posts

01-04-2013

San Jose

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s405/s400 screen brightness issue after downgrading to windows 7

2013-01-04, 8:04 AM

it seems OK on win8, but on win7 I prefered, the display is so dim even at max bright. Anyone has a solution for this? I tried reinstall win7, update amd driver and right now doing a win xp install, hopefully amd driver works on win xp.

 

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2651 Posts

03-21-2012

Malaysia

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Re: dim display on s405, any solution so far?

2013-01-25, 3:39 AM

Hi all,

 

Thanks for your patience and understanding. I spoke to the teams working on this issue and they have concluded with these results.

 

"There are 101 steps on brightness setting in Win8 OS, but it only has 16 steps for Win7. That’s why there is dim display issue. Based on the company policy and strategy, Lenovo only provide the mini support on this kind of compatibility issue, and will not do the program update.

 

Windows 8 fully supports Windows 7 application. And there is no hardware defect on this issue. Once the machine is restored by Windows 8 recovery media, its original brightness will be resumed."

 


Currently there is a tip released to the public. This can be confirmed from the link below.

 

http://support.lenovo.com/en_MY/research/hints-or-tips/detail.page?DocID=HT076504

 

Hope this clarifies the issue.

 

Regards

 

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13866 Posts

12-07-2009

Czech Republic

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Re: dim display on s405, any solution so far?

2013-01-06, 12:18 PM
hi jack01237,

please. make sure you installed power management, too then try to change the brightness.


Due to my absence, I may not reply your posts and/or personal messages

http://www.krasotaiskusstva.com
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4 Posts

01-06-2013

Tunisia

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Re: dim display on s405, any solution so far?

2013-01-06, 16:45 PM

I've tried that to no avail. I've tried both the Win7 and Win8 drivers on the Lenovo site, and the newest update from AMD. I'm running Windows 7... the laptop came with Windows 8, but I formatted and installed 7. I've also looked in the BIOS for any changable settings.

 

It's WAY too dim and I can't find an answer anywhere, but at least I'm not alone. I'll seriously consider returning the system if I can't get it worked out.

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14 Posts

01-06-2013

USA

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Re: dim display on s405, any solution so far?

2013-01-06, 17:42 PM

This is EXACTLY the problem I have and what I did.

 

Lenovo needs to fix this problem ASAP!! Everything else works, but I can't work with a screen that suddenly became 30% of it's max brightness at all times.....

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14 Posts

01-12-2013

USA

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Re: dim display on s405, any solution so far?

2013-01-12, 22:13 PM

I truely can not believe we are all having such a ridiculous problem trying to get something as simple as a Windows 7 install to PROPERLY work. I can only hope that Lenovo monitors these boards and fixes this issue before I run out of time and must return this machine for a brand that I know will work with Win 7. 

 

I can CONFIRM that neither the Win 8 drivers for Power Mgmt or Chipset work in Win 7. Please Lenovo, FIX the Win 7 Chipset Driver.

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1 Posts

01-13-2013

Russia

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  • Message 6 of 102

Lenovo S400 screen brightness darker on Win 7!

2013-01-14, 9:10 AM

So I recently bought a Lenovo S400 that came with Windows 8 for someone.  

However, he didn't like Windows 8 so I installed Windows 7 on it.  After installing all the driver, the screen for some reason got darker.  It seems like the lowerst the screen brightness can go and the hightest the screen brightness can go got lowered. When i drag brightness level to minimum the screen is totaly black, some problems with brightness range!.  I thought it may have been a driver issues so I uninstalled and reinstalled all of the driver without any luck.  So I just formmated the computer again but still no luck. Same bright in BIOS.

All drivers from lenovo site, for Win7 x64. 

Does anybody have any solutions for this?

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1 Posts

01-14-2013

United States

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Re: Lenovo S400 screen brightness darker on Win 7!

2013-01-14, 12:33 PM

Hi, just got my S400 and windows 8 got me sick too. tought about switching to windows 7 but read about the problem.

I'd like to try this for myself. Will installing windows 7 break the one-key-recovery? Im not sure how the hidden partition get booted, so im wondering if this will damage it.

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105 Posts

01-10-2013

Raleigh, NC

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Re: Lenovo S400 screen brightness darker on Win 7!

2013-01-14, 21:45 PM

Are you able to connect an external monitor and see if it is the same dark screen?

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5 Posts

01-15-2013

UK

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Re: Lenovo S400 screen brightness darker on Win 7!

2013-01-15, 14:32 PM

i have the same issue...anyone help?

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5 Posts

01-15-2013

UK

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  • Message 10 of 102

Re: dim display on s405, any solution so far?

2013-01-15, 14:53 PM

Any news from Lenovo? I have the same issue. Laptop is no use as it is.

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