dix/dispatch.c:4049: AttachOffloadGPU: Assertion `new->current_master == pScreen' failed.

[Michel Dänzer]

On 15/08/17 02:48 AM, Paul Menzel wrote:
> On 08/14/17 03:15, Michel Dänzer wrote:
>> On 11/08/17 01:02 AM, Paul Menzel wrote:
>>> On 08/10/17 15:14, Paul Menzel wrote:
>>>
>>>> Xorg:
>>>> /dev/shm/bee-root/xorg-server/xorg-server-1.19.3-0/source/dix/dispatch.c:4049:
>>>>
>>>> AttachOffloadGPU: Assertion `new->current_master == pScreen' failed.
>>>> ```
>>>>
>>>> The USB keyboard does not work, and the system has to be controlled
>>>> remotely over SSH. Plugging in the DisplayPort cable into the internal
>>>> Intel graphics ports the Linux messages can be seen, but nothing else
>>>> works. Stopping GDM does not bring back the TTY screen. The keyboard
>>>> still does work. Plugging the USB cable out and back in doesn’t fix it
>>>> either.
>>>>
>>>> Trying to disable the internal Intel graphics card, did not fix the
>>>> problem either.
>>>
>>> Blacklisting the module *i915* works around the problem.
>>>
>>> Please tell me if you want me to create a bug report for this issue,
>>> and, if yes, what part in the graphics stack this problem belongs to.
>>
>> It's hard to be sure without seeing a backtrace of the assertion
>> failure, but I'd say start at
>> https://bugs.freedesktop.org/enter_bug.cgi?product=xorg&component=Server/Ext/RandR.
>>
> 
> Do you know why the stack trace is not present in the X server log?

Because your xserver build doesn't have
https://cgit.freedesktop.org/xorg/xserver/commit/?id=27a6b9f7c84c914d0f5909ec1069d72f5035bc04
(it's only in Git master yet).


> I was able to get a stack trace as root and with GDB. Issue #102222
> (dix/dispatch.c:4049: AttachOffloadGPU: Assertion `new->current_master
> == pScreen' failed.) tracks this problem now, and the stack traces are
> attached there.

Thanks, though it looks like it might actually be a downstream issue.


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer