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[Xen-users] Blank screen when starting X with Dom0 loaded fglrx Radeon M6700

To: "xen-users@xxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxx>

Date: Sun, 13 Oct 2013 14:56:25 -0700 (PDT)

Delivery-date: Sun, 13 Oct 2013 21:57:49 +0000

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List-id: Xen user discussion <xen-users.lists.xen.org>

Greeted by a blank screen when X starts when booting Dom0. Booting without Dom0, X starts. Have tried latest official, beta, and elrepo fglrx drivers with the same result.

Kernel version is 3.4.53-8.el6.x86_64.
Xorg: Xorg-1.13.0-11
Xen version is 4.2.3.
Device: 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Whistler XT [AMD Radeon HD 6700M Series].

I noticed a series of these in the xl dmesg:

(XEN) traps.c:2592:d0 Domain attempted WRMSR 0000000000000079 from 0x0000000000000000 to 0xffffc900089cc030.

I found a similar thread with a patch referenced and applied & rebuilt the kernel. No change.

http://lists.xen.org/archives/html/xen-devel/2012-03/msg00320.html
http://git.kernel.org/?p=linux/kernel/git/konrad/xen.git;a=blobdiff;f=drivers/char/mem.c;h=a1be5259aabbc4d3cfa9022bbc9655c382555103;hp=8fc04b4f311f72c802a1df13af7108e3082a1b3f;hb=0cfd8ac8e702db147a9a664212f597f627b3f7e9;hpb=02f8c6aee8df3cdc935e9bdd4f2d020306035dbe

I also looked at the DRM documentation - I think the kernel and Xen version's that I'm using support DRM. Also tried iommu=1 & 0, radeon.modetest=0 & 1, and nopat grub options.

Art

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