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T400 /p8400 64 bit w10 switchable -----

T400/410/420 and T500/510/520 series specific matters only
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Ignorant
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Location: Mumbai, India

T400 /p8400 64 bit w10 switchable -----

#1 Post by Ignorant » Sat May 25, 2019 10:01 am

I have a w10 64 bit working.The switchable graphics is all crap(vokswagon quality) and generates heat in excess of any usage.!
The chip say ATI Mobility 3400 series but i get only 1152X 864 max. In software only i get 1440 X 900.
Is that correct or i can chnage the ATI/AMD driver? I have a high resolution tube light based lcd.

w0qj
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Re: T400 /p8400 64 bit w10 switchable -----

#2 Post by w0qj » Sun May 26, 2019 10:17 am

ATI video driver download page as below, and think your T400 has ATI Mobility Radeon 3470 w/ 256MB (hybrid switching):

www.amd.com/en/support/kb/faq/gpu-615

~Unfortunately it looks like your GPU is not supported undre Win10, as amd.com webpage explained that:

"AMD Radeon™ HD 4000 Series products and older are not certified to support Windows Display Driver Model (WDDM) 1.2 or higher and therefore, do not have driver support for Windows® 10.
The following is a list of graphics products that do not support Windows® 10:
...
ATI Radeon™ HD 3000 Series /ATI Mobility Radeon™ HD 3000 Series Graphics...
...
...
Windows® 10 will install the default Microsoft®​ Basic Display Driver (MBDD) for these graphics adapters. MBDD provides basic display functionality (low resolutions and color) on a single monitor but DOES NOT support:

Display scaling control
Multiple displays
Display rotation
Video capture
Power settings
VSync control
Brightness control on integrated display panels
AMD Catalyst™ Control Center"
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Ignorant
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Re: T400 /p8400 64 bit w10 switchable -----

#3 Post by Ignorant » Tue Jun 11, 2019 3:07 am

I have learnt how to disable discrete graphics via bios setting.But my laptop still sizzles @(mumbai India) with w10 software graphics at 1400x900.How do i get the most appropriate software video driver if the fan is working propeRly?.i do graphics,dont use it to play songs /no videos.If it computes numbers i am happy.
Please ...experiences.... :roll:

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Re: T400 /p8400 64 bit w10 switchable -----

#4 Post by RealBlackStuff » Tue Jun 11, 2019 11:24 pm

Dump W10 and install Linux, e.g. Mint or Manjaro.
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farmall
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Re: T400 /p8400 64 bit w10 switchable -----

#5 Post by farmall » Wed Jun 12, 2019 5:07 pm

I agree on using a Linux host. If you need anything Windows-specific you can run Windows in a VM or using Wine if the program is compatible.

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Re: T400 /p8400 64 bit w10 switchable -----

#6 Post by TPFanatic » Wed Jun 12, 2019 7:31 pm

If the machine is getting hot you may need new thermal paste and dust cleaning.
lenovo T420 i7 2670qm 16GB QHD + eGPU GTX 960
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Re: T400 /p8400 64 bit w10 switchable -----

#7 Post by wujstefan » Thu Jun 13, 2019 4:10 am

This is just the well-known issue with 3470.

Dump W10, install Linux / W7, everything will work just fine.

Dusting is always a good thing anyway ;)
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Ignorant
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Location: Mumbai, India

Re: T400 /p8400 64 bit w10 switchable -----

#8 Post by Ignorant » Sat Jun 15, 2019 6:40 am

as soon as i am done with my current development i am going back to w7.....

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