linux-kernel - Re: [PATCH] drm/nouveau/gem: tolerate a buffer specified multiple times

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Date:	Thu, 30 Jul 2015 11:02:25 -0400
From:	Ilia Mirkin <imirkin@...m.mit.edu>
To:	"Bryan O'Donoghue" <pure.logic@...us-software.ie>
Cc:	Peter Hurley <peter@...leysoftware.com>,
	Maarten Lankhorst <maarten.lankhorst@...onical.com>,
	Ben Skeggs <bskeggs@...hat.com>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/nouveau/gem: tolerate a buffer specified multiple times

On Thu, Jul 30, 2015 at 10:56 AM, Bryan O'Donoghue
<pure.logic@...us-software.ie> wrote:
> On 30/07/15 15:52, Bryan O'Donoghue wrote:
>>
>> On 30/07/15 15:49, Peter Hurley wrote:
>>>
>>> On 07/30/2015 10:12 AM, Ilia Mirkin wrote:
>>>>
>>>> Is this happening with libdrm 2.4.60? If so, that's a known
>>>> (user-side) issue and should be fixed by using any version but that
>>>> one.
>>>
>>>
>>> What's the freedesktop bugzilla # for reference?
>>>
>>> Regards,
>>> Peter Hurley
>>
>>
>> I believe it's this one
>>
>> https://bugs.freedesktop.org/show_bug.cgi?id=89842#c19
>>
>
> Not really a world of choice on ubuntu to fix it though...
>
> deckard@...eko:~/Development/projectara$ apt-show-versions libdrm2
> libdrm2:amd64/trusty-updates 2.4.60-2~ubuntu14.04.1 uptodate
> libdrm2:i386/trusty-updates 2.4.60-2~ubuntu14.04.1 uptodate
>
> :(

That's unfortunate. I know next to nothing about debian/ubuntu or how
they do versions or how to even build packages for them. But they're
big distros, presumably they have support teams of some sort, perhaps
they can help you.

Assuming that switching away does resolve the issue for you, perhaps
you can also recommend that they avoid shipping that version, or
include this nouveau fix in it:

http://cgit.freedesktop.org/mesa/drm/commit/?id=812e8fe6ce46d733c30207ee26c788c61f546294

This whole libdrm thing is a bit of a cluster%@#$ unfortunately --
2.4.60 is broken for nouveau, building even the latest released
xf86-video-intel against 2.4.61+ causes it to not start ("fixed" in
xf86-video-intel git), and newer mesa requires libdrm 2.4.60+.

  -ilia
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