[PATCH 1/3] drm/radeon: stop poisoning the GART TLB

[Dieter Nützel]

Am 25.06.2014 05:59, schrieb Michel Dänzer:
> On 24.06.2014 19:14, Christian König wrote:
>> Am 24.06.2014 08:49, schrieb Michel Dänzer:
>>> On 23.06.2014 18:56, Christian König wrote:
>>>> Am 23.06.2014 10:15, schrieb Michel Dänzer:
>>>>> On 19.06.2014 18:45, Christian König wrote:
>>>>> 
>>>>>> I think even when we revert to the old code we have a couple of
>>>>>> unsolved
>>>>>> problems with the VM support or in the driver in general where we
>>>>>> should
>>>>>> try to understand the underlying reason for it instead of applying
>>>>>> more
>>>>>> workarounds.
>>>>> I'm not suggesting applying more workarounds but going back to a 
>>>>> known
>>>>> more stable state. It seems like we've maneuvered ourselves to a 
>>>>> rather
>>>>> uncomfortable position from there, with no clear way to a better 
>>>>> place.
>>>>> But if we basically started from the 3.14 state again, we have a 
>>>>> few
>>>>> known hurdles like mine and Marek's Bonaire etc. which we know any
>>>>> further improvements will have to pass before they can be 
>>>>> considered
>>>>> for
>>>>> general consumption.
>>>> Yeah agree, especially on the uncomfortable position.
>>>> 
>>>> Please try with the two attached patches applied on top of 3.15 and
>>>> retest. They should revert back to the old implementation.
>>> Unfortunately, X fails to start with these, see the attached excerpt
>>> from dmesg.
>> 
>> My fault, incorrectly solved a merge conflict and then failed to test
>> the right kernel.
>> 
>> BTW: Wasn't there an option to tell grup to use the latest installed
>> kernel instead of the one with the highest version number? Can't seem 
>> to
>> find that any more.

Maybe this helps (section 5. Grub 2 Files & Options).
http://ubuntuforums.org/showthread.php?t=1195275

GRUB_DEFAULT

Regards,
   Dieter