Blank screen while loading AMD/ATI graphics driver (fglrx) in Dom0 (Linux 3.0/3.2) with Xen 4.1/4.2

[sahilsuneja <sahilsuneja@gmail.com>]

Hi,

I had posted the following issue a few days ago in Xen-users but I haven't
received any answer yet. So I decided to re-post it here in hope for some
solution. 

Here's the original post:

Xen wiki states that using linux 3.0 and above as dom0 works with all
graphics cards. I could install the fglrx graphics driver on my desktop
machine with a discrete graphics card (Radeon HD 5870), but I see a blank
screen while loading fglrx on my AMD Fusion E350 machine with integrated
graphics card (Radeon HD 6310). The graphics driver loads fine when the
Linux kernel runs alone not as Dom0. I am using the latest driver from AMD's
website (ATI Catalyst 12.1).

Relevant portion of Xorg.0.log on Fusion:
[    36.224] (II) LoadModule: "fglrxdrm"
[    36.224] (II) Loading /usr/lib/xorg/modules/linux/libfglrxdrm.so
[    36.225] (II) Module fglrxdrm: vendor="FireGL - ATI Technologies Inc."
[    36.225] compiled for 1.4.99.906, module version = 8.93.4
[    36.238] ukiDynamicMajor: found major device number 250
[    36.238] ukiDynamicMajor: found major device number 250
[    36.238] ukiOpenByBusid: Searching for BusID PCI:0:1:0
[    36.238] ukiOpenDevice: node name is /dev/ati/card0
[    36.239] ukiOpenDevice: open result is 12, (OK)
[    36.239] ukiOpenByBusid: ukiOpenMinor returns 12
[    36.239] ukiOpenByBusid: ukiGetBusid reports PCI:0:1:0
[    36.244] (==) fglrx(0): NoAccel = NO
[    36.244] (==) fglrx(0): ATI 2D Acceleration Architecture enabled
[    36.244] (--) fglrx(0): Chipset: "AMD Radeon HD 6310 Graphics" (Chipset
= 0x9802)
[    36.244] (--) fglrx(0): (PciSubVendor = 0x17aa, PciSubDevice = 0x21df)
[    36.244] (==) fglrx(0): board vendor info: third party graphics adapter
- NOT original ATI
[    36.244] (--) fglrx(0): Linear framebuffer (phys) at 0xe0000000
[    36.245] (--) fglrx(0): MMIO registers at 0xf0200000
[    36.245] (--) fglrx(0): I/O port at 0x00004000
[    36.245] (==) fglrx(0): ROM-BIOS at 0x000c0000
[    36.267] (II) fglrx(0): ATIF platform detected
[    36.268] (II) fglrx(0): AC Adapter is used
[    36.375] (WW) System lacks support for changing MTRRs
[    36.377] (EE) fglrx(0): V_BIOS address 0x575a0 out of range
[    36.377] (II) fglrx(0): Invalid ATI BIOS from int10, the adapter is not
VGA-enabled
[    36.377] *(EE) fglrx(0): Invalid video BIOS signature!*
[    36.378] (EE) fglrx(0): GetBIOSParameter failed
[    36.378] (EE) fglrx(0): PreInitAdapter failed
[    36.378] (EE) fglrx(0): PreInit failed
[    36.378] (II) fglrx(0): === [xdl_xs110_atiddxPreInit] === end
[    36.383] (II) UnloadModule: "fglrx"
[    36.384] (II) Unloading fglrx
[    36.384] (II) UnloadModule: "fglrxdrm"
[    36.384] (II) Unloading fglrxdrm
[    36.384] (II) UnloadModule: "vgahw"
[    36.384] (II) Unloading vgahw
[    36.384] (II) UnloadModule: "fglrxdrm"
[    36.384] (II) Unloading fglrxdrm
[    36.384] (EE) Screen(s) found, but none have a usable configuration.


Healthy Xorg.0.log file on desktopm discrete GPU:
[    21.774] (II) LoadModule: "fglrxdrm"
[    21.774] (II) Loading /usr/lib/xorg/modules/linux/libfglrxdrm.so
[    21.774] (II) Module fglrxdrm: vendor="FireGL - ATI Technologies Inc."
[    21.774] compiled for 1.4.99.906, module version = 8.93.4
[    21.778] ukiDynamicMajor: found major device number 249
[    21.779] ukiDynamicMajor: found major device number 249
[    21.779] ukiOpenByBusid: Searching for BusID PCI:1:0:0
[    21.779] ukiOpenDevice: node name is /dev/ati/card0
[    21.779] ukiOpenDevice: open result is 12, (OK)
[    21.779] ukiOpenByBusid: ukiOpenMinor returns 12
[    21.779] ukiOpenByBusid: ukiGetBusid reports PCI:1:0:0
[    21.779] (==) fglrx(0): NoAccel = NO
[    21.779] (==) fglrx(0): ATI 2D Acceleration Architecture enabled
[    21.779] (--) fglrx(0): Chipset: "ATI Radeon HD 5800 Series" (Chipset =
0x6898)
[    21.779] (--) fglrx(0): (PciSubVendor = 0x1002, PciSubDevice = 0x0b00)
[    21.779] (==) fglrx(0): board vendor info: original ATI graphics adapter
[    21.779] (--) fglrx(0): Linear framebuffer (phys) at 0xe0000000
[    21.779] (--) fglrx(0): MMIO registers at 0xf7ac0000
[    21.779] (--) fglrx(0): I/O port at 0x0000a000
[    21.779] (==) fglrx(0): ROM-BIOS at 0x000c0000
[    21.794] (II) fglrx(0): AC Adapter is used
[    21.824] (WW) System lacks support for changing MTRRs
[    21.841] (EE) fglrx(0): V_BIOS address 0x2a150 out of range
[    21.841] (II) fglrx(0): Invalid ATI BIOS from int10, the adapter is not
VGA-enabled
[    22.038] *(II) fglrx(0): ATI Video BIOS revision 9 or later detected*
[    22.038] (--) fglrx(0): Video RAM: 1048576 kByte, Type: GDDR5
[    22.038] (II) fglrx(0): PCIE card detected
[    22.038] (--) fglrx(0): Using per-process page tables (PPPT) as GART.
[    22.038] (II) fglrx(0): board/chipset is supported by this driver
(original ATI board)
[    22.042] (II) fglrx(0): Using adapter: 1:0.0.
[    22.078] (II) fglrx(0): [FB] MC range(MCFBBase = 0xf00000000, MCFBSize =
0x40000000)
[    22.138] (II) fglrx(0): Interrupt handler installed at IRQ 308.
[    22.138] (II) fglrx(0): RandR 1.2 support is enabled!
[    22.138] (II) fglrx(0): RandR 1.2 rotation support is enabled!
[    22.138] (==) fglrx(0): Center Mode is disabled
[    22.138] (II) Loading sub module "fb"
[    22.138] (II) LoadModule: "fb"
[    22.138] (II) Loading /usr/lib/xorg/modules/libfb.so
[    22.146] (II) Module fb: vendor="X.Org Foundation"
[    22.146] compiled for 1.10.4, module version = 1.0.0
[    22.146] ABI class: X.Org ANSI C Emulation, version 0.4

I also see the following towards the end of xm dmesg on Fusion, I wonder if
this is related:
(XEN) traps.c:2559:d0 Domain attempted WRMSR 00000000c0010004 from
0x0000000000000000 to 0x000000000000abcd.
(XEN) APIC error on CPU0: 00(80)

Does any one have a reason / solution, please?

-Sahil 

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