Public bug reported:

I tried this driver on an arm64 server w/ an AST2000 controller, but it
fails. Initially it fails because it cannot find the module:

[  1882.123] (II) LoadModule: "ast"
[  1882.124] (WW) Warning, couldn't open module ast
[  1882.124] (II) UnloadModule: "ast"
[  1882.124] (II) Unloading ast
[  1882.124] (EE) Failed to load module "ast" (module does not exist, 0)

stracing X shows that the driver appears to be installed in a directory
outside of Xorg's configured search path (/usr/lib/aarch64-linux-
gnu/xorg/modules/drivers/). To get passed this, I symlinked the module
into /usr/lib/xorg/modules/drivers. That allows X to find and load the
module, but it fails to initialize:

[  2186.430] (II) AST(0): Creating default Display subsection in Screen section
        "Default Screen Section" for depth/fbbpp 24/32
[  2186.430] (==) AST(0): Depth 24, (--) framebuffer bpp 32
[  2186.430] (==) AST(0): Using gamma correction (1.0, 1.0, 1.0)
[  2186.430] (==) AST(0): RGB weight 888
[  2186.430] (==) AST(0): Default visual is TrueColor
[  2186.430] (--) AST(0): Chipset: "ASPEED Graphics Family"
[  2186.430] (II) AST(0): Linear framebuffer at 0x10000000
[  2186.430] (II) AST(0): IO registers at addr 0x11000000
[  2186.430] (EE) AST(0): Map Memory Map IO Failed 
[  2186.430] (II) UnloadModule: "ast"

** Affects: xserver-xorg-video-ast (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1592561

Title:
  Doesn't work on arm64

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