Graphics blues, black screen after verbose boot stage/before login.

[wbsgrepit]

Hi guys, I am having an issue with getting my graphics working well. I have a clevo p750dm-g, i7-6700k, 32gb (2x16), nvidia 970m, 4k screen @60 on a 950 m.2. I am able to boot in and have most things working except graphics. If I boot with nv_disable I can see the screen but it has flashing areas (it seems to be where any animations are being drawn). I have installed the nvidia web drivers (...05f02) and when I boot with nvda_drv=1 the screen sleeps after the verbose boot phase is done. I have tried using inject EDID and customEDID but it seems like the os is not understanding my display properties...

I have attached my EFI (which includes a boot log and F4 output) a dump of my EDID and ACPI from linux and the output from IOReg. Please let me know if you have any ideas -- banging my head against the wall.

View attachment p750dm-g.zip

Edited to add nv_disable flashing areas are more like .5fps refreshes for portions of the screen that are updating..

 

[wbsgrepit]

Looks like it is both the display panel and card not being fully recognized. No idea where to go from here -- I looked at the DSDT and I have no idea how to start rewriting that.

 

[RehabMan]

Hi guys, I am having an issue with getting my graphics working well. I have a clevo p750dm-g, i7-6700k, 32gb (2x16), nvidia 970m, 4k screen @60 on a 950 m.2. I am able to boot in and have most things working except graphics. If I boot with nv_disable I can see the screen but it has flashing areas (it seems to be where any animations are being drawn). I have installed the nvidia web drivers (...05f02) and when I boot with nvda_drv=1 the screen sleeps after the verbose boot phase is done. I have tried using inject EDID and customEDID but it seems like the os is not understanding my display properties...

I have attached my EFI (which includes a boot log and F4 output) a dump of my EDID and ACPI from linux and the output from IOReg. Please let me know if you have any ideas -- banging my head against the wall.

View attachment 180785

Edited to add nv_disable flashing areas are more like .5fps refreshes for portions of the screen that are updating..

You're using nvda_drv=1. Did you install the Nvidia web drivers?

Did you patch IOKit? (required for UHD, see FAQ).

http://www.tonymacx86.com/el-capita...faq-read-first-laptop-frequent-questions.html

Note: You should remove the invalid flags you have in config.plist/Boot/Arguments. GraphicsEnabler, MountEFI, and GraphicsMode are not valid kernel flags.

 

[wbsgrepit]

You're using nvda_drv=1. Did you install the Nvidia web drivers?

Did you patch IOKit? (required for UHD, see FAQ).

http://www.tonymacx86.com/el-capita...faq-read-first-laptop-frequent-questions.html

Note: You should remove the invalid flags you have in config.plist/Boot/Arguments. GraphicsEnabler, MountEFI, and GraphicsMode are not valid kernel flags.

I am trying to use ncda_drv -- that would be the goal. Yes I have the web driver installed. When I turn it on and try to run with nvda_drv instead of nv_disable the display goes black/to sleep after the verbose text stops right before login. I think that the EDID and GPU are both not being sensed correctly but am unsure what to do to fix it. The way I read that thread it appears that the DVMT patches are related to driving that many pixels with a low mem/shared mem igpu. The IOkit patch looks like it is needed specifically for the intel gfx to cheat on driving those pixels? If I could get the gpu/display recognized correctly I don't know that I need to worry about that as I would not need to use the gpu in 3mb of vram fallback mode instead of 6gb or am I misunderstanding what that is patching? Does the DVMT prealloc even apply to a full dedicated GPU or is that just igpu shared memory?

I noticed those were dead options -- I was posting the question after 12 hours of bashing my head on the wall trying to get the edid/gpu recognized and trying random stuff by that point. =)

The only active gfx on this laptop is the 970m -- the igpu is disabled and not wired out to any ports.

 

[RehabMan]

I am trying to use ncda_drv -- that would be the goal. Yes I have the web driver installed. When I turn it on and try to run with nvda_drv instead of nv_disable the display goes black/to sleep after the verbose text stops right before login. I think that the EDID and GPU are both not being sensed correctly but am unsure what to do to fix it. The way I read that thread it appears that the DVMT patches are related to driving that many pixels with a low mem/shared mem igpu. The IOkit patch looks like it is needed specifically for the intel gfx to cheat on driving those pixels? If I could get the gpu/display recognized correctly I don't know that I need to worry about that as I would not need to use the gpu in 3mb of vram fallback mode instead of 6gb or am I misunderstanding what that is patching? Does the DVMT prealloc even apply to a full dedicated GPU or is that just igpu shared memory?

I noticed those were dead options -- I was posting the question after 12 hours of bashing my head on the wall trying to get the edid/gpu recognized and trying random stuff by that point. =)

The only active gfx on this laptop is the 970m -- the igpu is disabled and not wired out to any ports.

DVMT is specific to IGPU. But patching IOKit is required for either (UHD).

 

[wbsgrepit]

"3cec8ae287ee52a3622082bfc049bb86")
  echo "         --> El Capitan 10.11.3 IOKit (${GREEN}unpatched${OFF})"
  sudo perl -i.bak -pe 's|\xB8\x01\x00\x00\x00\xF6\xC1\x01\x0F\x85|\x33\xC0\x90\x90\x90\x90\x90\x90\x90\xE9|sg' /System/Library/Frameworks/IOKit.framework/Versions/Current/IOKit
  sudo codesign -f -s - /System/Library/Frameworks/IOKit.framework/Versions/Current/IOKit
  echo "         Patched"

The IOkit patch looks like it only applies to specific versions (that match md5 sigs) and falls through to a noop on unmatched. the version i have is not matching any of the signatures in the script. I also can't seem to find any info for what the patch is even meaning to patch (not that I would be able to make a different version myself anyways).

d41d8cd98f00b204e9800998ecf8427e /System/Library/Frameworks/IOKit.framework/Versions/Current/IOKit

 

[wbsgrepit]

It it looks like that patch is only relevant to pushing 4k 30hz over hdmi or displayport -- apple's site says most systems since 10.10 support 4k @60hz even on those connectors. https://support.apple.com/en-us/HT202856.

I really think the issue is either the EDID is not being recognized or that the GPU is not outputting to the right port/not recognized or something. This is just my first time doing this and I have no idea how to read the assembly or understand the internals well enough to understand if there is a patch I am missing or how to make one.

 

[RehabMan]

"3cec8ae287ee52a3622082bfc049bb86")
  echo "         --> El Capitan 10.11.3 IOKit (${GREEN}unpatched${OFF})"
  sudo perl -i.bak -pe 's|\xB8\x01\x00\x00\x00\xF6\xC1\x01\x0F\x85|\x33\xC0\x90\x90\x90\x90\x90\x90\x90\xE9|sg' /System/Library/Frameworks/IOKit.framework/Versions/Current/IOKit
  sudo codesign -f -s - /System/Library/Frameworks/IOKit.framework/Versions/Current/IOKit
  echo "         Patched"

The IOkit patch looks like it only applies to specific versions (that match md5 sigs) and falls through to a noop on unmatched. the version i have is not matching any of the signatures in the script. I also can't seem to find any info for what the patch is even meaning to patch (not that I would be able to make a different version myself anyways).

d41d8cd98f00b204e9800998ecf8427e /System/Library/Frameworks/IOKit.framework/Versions/Current/IOKit

From where did you download OS X?

 

[RehabMan]

It it looks like that patch is only relevant to pushing 4k 30hz over hdmi or displayport -- apple's site says most systems since 10.10 support 4k @60hz even on those connectors. https://support.apple.com/en-us/HT202856.

I really think the issue is either the EDID is not being recognized or that the GPU is not outputting to the right port/not recognized or something. This is just my first time doing this and I have no idea how to read the assembly or understand the internals well enough to understand if there is a patch I am missing or how to make one.

You should try InjectEDID (and CustomEDID) if needed.

 

[wbsgrepit]

You should try InjectEDID (and CustomEDID) if needed.

Re: Where did I get OSX from my mackbook pro late 2009, with the createinstall method.

I have tried the injectEDID and CustomEDID flags; both separately and in unison but I do not know that they were correct. In the zip I attached I have the xrandr output and show the CustomEDID block i was using in the config.plist if you could take a look and verify I am doing it right.