Got some spare time at the moment so I've decided to attempt to tackle this one. As far as I can see a windows 8.1 Jailbreak is already out of the question. To many people have tried and failed so tbh I'm not even going to attempt it!
Downgrading to windows 8 on the other hand does seem plausible.
What I have already discovered:
The Surface RT 8.0 image will boot and BSOD.
The cause of the BSOD is down to both storage and display drivers , a modified WIM with the surface 2 storage drivers will allow the os to install and boot to a BSOD with graphical glitches relating to the display driver.
Booting without video drivers and forcing the standard VGA compatible driver causes no output after the surface logo however it does not seem to BSOD, the system keeps on running providing both USB power and power to the typecase. Plugging in an external display also has no output but the monitor does detect a device.
I already have an original RT downgraded to 8.0 that I can use to aid development.
From what I can tell the main issue of getting display output is down to the Tegra 4 VGA driver not being compatible with windows 8, probably down to driver signing. I already have a few ideas on how to tackle this.
Its been over 6 months since I looked into this and I have since sold my surface 2 but I've decided to order a used one to continue with the project, I feel there is still some life left in the hardware and I would like to be able to use it to its full potential.
If I've missed anything or if anyone has any ideas please let me know. As soon as I have the surface 2 I will be continuing with this and will hopefully have a test image in the coming months :)
Downgrading to windows 8 on the other hand does seem plausible.
What I have already discovered:
The Surface RT 8.0 image will boot and BSOD.
The cause of the BSOD is down to both storage and display drivers , a modified WIM with the surface 2 storage drivers will allow the os to install and boot to a BSOD with graphical glitches relating to the display driver.
Booting without video drivers and forcing the standard VGA compatible driver causes no output after the surface logo however it does not seem to BSOD, the system keeps on running providing both USB power and power to the typecase. Plugging in an external display also has no output but the monitor does detect a device.
I already have an original RT downgraded to 8.0 that I can use to aid development.
From what I can tell the main issue of getting display output is down to the Tegra 4 VGA driver not being compatible with windows 8, probably down to driver signing. I already have a few ideas on how to tackle this.
Its been over 6 months since I looked into this and I have since sold my surface 2 but I've decided to order a used one to continue with the project, I feel there is still some life left in the hardware and I would like to be able to use it to its full potential.
If I've missed anything or if anyone has any ideas please let me know. As soon as I have the surface 2 I will be continuing with this and will hopefully have a test image in the coming months :)
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