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Acer 5742G Nvidia GT420m ONLY 512vram should be 1024vram!

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myndfuk
Posts: 4
Joined: 05 Dec 2011, 23:18

Acer 5742G Nvidia GT420m ONLY 512vram should be 1024vram!

Post by myndfuk »

Olá,

Sorry I only speak english. :cry:

I have only 512vram detected for this card, it should be 1024 mb vram. I used the DSDT auto patcher and the Acer 5742G dsdt.aml when I installed. I am running 10.6.6 and 10.6.0 legacy kernel and used the Modded-NVIDIA_Retail_Mac_Driver_256.01.00f03 by tonycrap.

GeForce GT 420M:

Chipset Model: GeForce GT 420M
Type: GPU
Bus: PCIe
Slot: Slot-1
PCIe Lane Width: x16
VRAM (Total): 512 MB
Vendor: NVIDIA (0x10de)
Device ID: 0x0df1
Revision ID: 0x00a1
ROM Revision: 70.08.19.00.67
Displays:
Display:
Resolution: 1366 x 768
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Built-In: Yes
Display Connector:
Status: No Display Connected

I have no other problems or issues with this install and have been using this laptop daily as my main work computer but it would be nice to get the full memory on the nvidia card finally fixed. :D

Not sure how to fix this to get 1024 mb vram. Update Chameleon? replace DSDT? install new modded drivers?, mulitibest???

Can anyone help? :cry:

Muito obrigado
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Cassio
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Posts: 3765
Joined: 26 Aug 2011, 22:53

Re: Acer 5742G Nvidia GT420m ONLY 512vram should be 1024vram

Post by Cassio »

How did you enable the video drivers? GraphicsEnabler, EFI string, DSDT, NVEnabler?

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ASUS N53Jq • CPU: Intel Core i7-740QM 1.73GHz • RAM: 6,0GB • HD: 500GB • GPU: GeForce GT 425M 1GB 1920x1080 • OS: [External Link Removed for Guests] • Linux Mint 15 • Windows 8
myndfuk
Posts: 4
Joined: 05 Dec 2011, 23:18

Re: Acer 5742G Nvidia GT420m ONLY 512vram should be 1024vram

Post by myndfuk »

Cassio wrote:How did you enable the video drivers? GraphicsEnabler, EFI string, DSDT, NVEnabler?

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Hi,

DSDT on install (no other method seemed to work), then just installed the modded drivers to get full graphics.

Is there anyway to tell other than through system profiler of the true vram usage?
User avatar
Cassio
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Posts: 3765
Joined: 26 Aug 2011, 22:53

Re: Acer 5742G Nvidia GT420m ONLY 512vram should be 1024vram

Post by Cassio »

Check the properties injected in the video device in DSDT, you probably have

Code: [Local Link Removed for Guests]

"VRAM,totalsize",
Buffer ()
{
    0x00, 0x00, 0x00, 0x20
},
change it to
"VRAM,totalsize", Buffer () { 0x00, 0x00, 0x00, 0x40 },
ASUS N53Jq • CPU: Intel Core i7-740QM 1.73GHz • RAM: 6,0GB • HD: 500GB • GPU: GeForce GT 425M 1GB 1920x1080 • OS: [External Link Removed for Guests] • Linux Mint 15 • Windows 8
myndfuk
Posts: 4
Joined: 05 Dec 2011, 23:18

Re: Acer 5742G Nvidia GT420m ONLY 512vram should be 1024vram

Post by myndfuk »

Cassio wrote:Check the properties injected in the video device in DSDT, you probably have

Code: [Local Link Removed for Guests]

"VRAM,totalsize",
Buffer ()
{
    0x00, 0x00, 0x00, 0x20
},
change it to
"VRAM,totalsize", Buffer () { 0x00, 0x00, 0x00, 0x40 },
Thank you Cassio for your help but I am very confused now. :cry: I can't find entries in my DSDT as you said. I have found entries under "display" for memsize but not totalsize. and it shows 0x40. I am think maybe I didn't install graphics via DSDT but if not I don't know how I did it!

I attach Grab of my dsdt under "display" if you can see and my dsdt. Any clue what I did wrong?
You do not have the required permissions to view the files attached to this post.
User avatar
Cassio
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Posts: 3765
Joined: 26 Aug 2011, 22:53

Re: Acer 5742G Nvidia GT420m ONLY 512vram should be 1024vram

Post by Cassio »

There is no nVidia enable code in your DSDT, you must be using another method.
ASUS N53Jq • CPU: Intel Core i7-740QM 1.73GHz • RAM: 6,0GB • HD: 500GB • GPU: GeForce GT 425M 1GB 1920x1080 • OS: [External Link Removed for Guests] • Linux Mint 15 • Windows 8
myndfuk
Posts: 4
Joined: 05 Dec 2011, 23:18

Re: Acer 5742G Nvidia GT420m ONLY 512vram should be 1024vram

Post by myndfuk »

Cassio wrote:There is no nVidia enable code in your DSDT, you must be using another method.

Thanks anyway for your help. Must have used graphics enabler on install, not sure how to fix but since its not really broken, I'll move on and keep saving for a real mac :lol:
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