crouton: X11 Fails to Start (Chromebook Flip C100, 45.0.2439.4 dev)

I am unable to run sudo startxfce4 on an Asus Chromebook Flip C100 (Minnie). X11 will fail to start and complain that it cannot find any screens.

[    77.186] (II) LoadModule: "modesetting"
[    77.187] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[    77.187] (II) Module modesetting: vendor="X.Org Foundation"
[    77.187]    compiled for 1.15.0, module version = 0.8.1
[    77.187]    Module class: X.Org Video Driver
[    77.187]    ABI class: X.Org Video Driver, version 15.0
[    77.187] (II) UnloadModule: "modesetting"
[    77.187] (II) Unloading modesetting
[    77.187] (II) Failed to load module "modesetting" (already loaded, -1209214808)
[    77.187] (II) LoadModule: "fbdev"
[    77.187] (WW) Warning, couldn't open module fbdev
[    77.187] (II) UnloadModule: "fbdev"
[    77.187] (II) Unloading fbdev
[    77.187] (EE) Failed to load module "fbdev" (module does not exist, 0)
[    77.187] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[    77.187] (--) using VT number 7

[    77.198] (WW) Falling back to old probe method for modesetting
[    77.199] (EE) No devices detected.
[    77.199] (EE)
Fatal server error:
[    77.199] (EE) no screens found(EE)

I have a simple workaround:

sudo enter-chroot
sudo rm /dev/dri/card0
sudo mv /dev/dri/card1 /dev/dri/card0

This allows everything to startup correctly. I suspect this regression was introduced by:

https://code.google.com/p/chromium/issues/detail?id=477792 https://chromium.googlesource.com/chromiumos/third_party/kernel/+/d4ec95d83b3a3209f35b0c8d645aa51fcc9924e5^!/#F0

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On a side note, I compiled xf86-video-armsoc. I managed to get es2gears running with hardware acceleration. This bug affects starting with fbdev and armsoc. The logs from above occur when starting with fbdev (aka, the default Crouton setup).

https://github.com/mmind/xf86-video-armsoc