new graphics driver for the slate

Ravikaleova · May 18, 2015

thadwald said: ↑

Good news.
And bad news.

First the good...

I have the EMGD 1.8 driver installed on my slate. It works! (yay)
Here is a link to it: https://skydrive.live.com/redir.aspx?cid=1b3a757dfb156eae&resid=1B3A757DFB156EAE!104
LED Flashlights

OpenGL 2.0 works along with DirectX 9ex. This is significant, as this is the first driver that Intel has released that supports both sets of APIs. (pretty sad for a chip that made its debut in 2007) You can now play Angry Birds to your heart's content.
The driver is WDDM 1.1, which basically means that it is Windows 7 compatible. I don't know which, if any, DirectX features are supported now that were not supported before.

Backlight, sleep, and hibernate works.

Now the bad news.

The only resolution supported with my build is 1024x600.
The HDMI out does not work with my build.

IE9 is still not HW accelerated. I am not sure which APIs it needs that are not supported by the chip. More on this later.

Windows Live Movie Maker still does not work. Apparently it also needs a DirectX 10.1 driver.

I will now provide instructions for building your own driver. Hopefully someone can figure out how to improve on some of the missing features, such as the limited resolution and the non-working HDMI port.

Get the Driver Package Here Intel® Embedded Design Center - Intel® Embedded Media and Graphics Driver (Intel® EMGD) and install it.

Run it and create a New Configuration

Enter a nice name for your driver.

Select the US15W chipset

Select Single as the Configuration mode

Add the LVDS port device

Note: For getting the HDMI port to work, I believe you would need to select Dual Independent Head for the configuration mode and configure the sDVO device.

Click next

Enter CMO0903 (I am not going to pretend that I know what this is. I believe I took it from an .inf file of a driver that worked.)

port rotation 0

Us EDID Display if available checked

Use EDID block checked

Select Internal LVDS as the output type (the only option)

Click on attribute settings

Check intensity and set to 100 (this means 100% brightness will be default)

Check Inverter Frequency and set to a nice, big number. I chose 30,000 and it works. If you go below 20,000 you might get some audible noise from the backlight controller. I cannot find any documentation on what the ideal frequency is. This value is zero by default and this is the reason why the backlight would not work with the prepackaged drivers that came with the Intel utility.

Click Finish

Click Flat Panel Settings and enter the following: T1=5, T2=25, T3=25, T4=550, T5=250

Click finish

Click next

Click Finish

Create a new package

Enter a nice name for the package

Select Windows7/WES

Select the configuration you made in the previous step

Click finish

Select the installation that you just made and click Generate Installation
Ta-Daa! done.

Install your driver

I obtained the power on-off sequence specifications for the Flat Panel Backlight from a spec sheet for the LCD display. I used Monitor Asset Manager (google it) to determine the make/model. I came up with Chi Mei N089L6-L03. I used this http://beyondinfinite.com/lcd/Library/Chimei/N089L6-L02.pdf. Note that the last character is off by 1.

Some notes on IE9 and HW acceleration.
I have no idea which APIs IE9 needs for hw acceleration that are not supported by the chip. There is a way to force IE9 to use HW Acceleration (google it); I tried it and it caused a BSOD. I discovered later that the culprit was the Broadcom Crystal HD Decoder, so I disabled it in Device Manager. With the Broadcom Decoder out of the way, IE9 no longer gets a BSOD and attempts to use the GPU's decoding engine. This crashed the page on any flash video site that I tried. I believe this to be a fault in the (new) driver. Otherwise, I can tell of no appreciable improvement on page rendering and scrolling speeds, so it probably isn't GPU accelerated anyway.

The only improvement that I noticed on the DirectX side of things is that Aero no longer has the video artifacts--which is nice.
Any program that uses OpenGL should be many times faster with this driver.

I have spent more time on this than I ever wanted to. Please understand that everything here is provided as-is and that I will be unlikely to find additional time for troubleshooting.
Click to expand...

The driver should work. It installs and the LCD display works; I have done so and could navigate Windows using a small flashlight. The LED backlight doesn't work, though. We need someone to configure the driver for the slate's backlight.

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new graphics driver for the slate

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