Solution for freezing HD3000 displays

[jkbuha]

Hi all

Having had all the freezing & artifact issues with my Dell XPS 15z (8GB RAM, HD3000 ID: 0126, 1920x1080 LVDS) and having tried all the proposed solutions in this forum (DSDT patching, SMCping, memory removal) but without success, I decided to investigate further and found this topic, courtesy of Micky1979: viewtopic.php?f=76&t=53970

It still didn't solve my problem, but got me thinking as to whether there could be an issue with my LVDS EDID configuration. The reason for my suspicion was that with (i) an external monitor connected, or (ii) with the LVDS rotated to 1080x1920, no issues were encountered. So I replaced my XPS 15z EDID configuration with a quasi-identical XPS 15 EDID as follows:

Original XPS 15z (L511z) EDID:

00FFFFFFFFFFFF0006AFED3000000000001401049022137802D1159E59539B271E505400000001010101010101010101010101010101B03680E0703808403064310058C11000001A752480E0703808403064310058C11000001A000000FE00303052344D80423135364857330000000000004122960111000002010A20200030

Replaced XPS 15 (L502x) EDID:

00ffffffffffff0006afed17000000000014010490221378022135ad5037aa2411505400000001010101010101010101010101010101783780ae703832403c30aa0058c11000001a783780ae703832403c30aa0058c11000001a000000fe004b5959564b804231353648573100000000000081029b0101000002010a20200001

Using the method described by Micky1979 in his post, adapted from insanelymac's CharredPC's method.

Result: absolutely no freezing or artefacts after having hammered the machine for 72 hours continuously. dmesg is clean (no hangup messages) as well.

What I'd like to know is this:

i) Can someone who is EDID friendly point out what the differences are between my original XPS 15z and the XPS 15 EDID?

ii) When (i) is identified, ca this change be applied to non-dell machines, ie any laptops/pcs which are experiencing hangups?

iii) Is the issue due to an incorrect vendor EDID, or an ultra-sensitive HD3000 kext, or a combination?

This should get us to properly understanding the HD3000 issue once and for all.

Thanks
jkbuha

 

[SANGEKi]

Hey there,
Just a quick note, for whatever it's worth.

I have a pretty much completely unusable 0116 which freezes and produces artifacts and basically hangs for seconds when starting mission control.
I just tried your new EDID and during my short test run I had absolutely no freezes whatsoever and mission control works fluidly.

Now, the problem is that my native res is only 1600x900 so I'm seeing only part of the output and can't really test any further.
Unfortunately I have no idea what anything in that 128 byte EDID string means so I can't really mess around with it.

This seems to be a great discovery and I hope that a universal solution can be created.

 

[Aire]

Hi jkbuha, I have the same model XPS as you and tried the EDID fix, but I'm getting some funky colors, fuzz, and screen inversion (everything's backwards). what else do you have to get graphics going? do you have any dsdt with this fix, and if so can you upload it?

also, please join us on the XPS 15z Lion thread! viewtopic.php?f=170&t=31903&start=80

Thanks in advance!

 

[jkbuha]

Hey Eric

Put this in your org.chameleon.Boot.plist and you should be fine:

<key>device-properties</key>
<string>5600000001000000010000004a0000000100000002010c00d041030a000000000101060000027fff0400240000004100410050004c00300030002c004400750061006c004c0069006e006b0000000800000001000000</string>

Sorry for not replying before - am quite busy at the mo!
I saw your other forum post, let me post some stuff there as well

Let me know if the above works

Cheers
jkbuha

 

[Micky1979]

Hi all,

I have seen for myself that same laptop, can have different EDID :
careful use of the other ones, the same series of Notebooks, but with different Producers / EEPROM

Good to see before, at least if the same vendor / product id

Goodbye and good luck to all

 

[Aire]

hey jkbuha, I got it to work!! turns out, it was actually that i was editing the file directly with textedit, when it's supposed to be done using plisteditorpro. but yeah, no more graphics problems! thanks for replying, and good luck with your thesis! alright, hopping back onto the other thread