https://bugs.freedesktop.org/show_bug.cgi?id=63599
--- Comment #33 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #32)
(In reply to comment #31)
(In reply to comment #30)
I've set each register values from fglrx-console.data and call xinit. Lockup again, nothing changes.
Does the patch in comment 29 fix the issue for you? That patch is upstream now and should be in most stable kernels as well.
To the pity, no. I've tested Linux 3.12 with the patch already applied and it changes nothing. My chip is:
$ lspci | grep 'VGA' 00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Sumo [Radeon HD 6480G]
Is it really a SUMO2 chip or I should open a new bug?
What's the numeric pci id (lspci -nn)? You should also see a line in the dmesg output like this: [ 1.758014] [drm] initializing kernel modesetting (SUMO 0x1002:0x9640 0x1458:0xD000).
It will say SUMO or SUMO2 depending on which one you have.