[ubuntu-x] Fwd: Re: MRE's for lts-saucy

[Maarten Lankhorst]

-------- Origineel bericht --------
Onderwerp: 	Re: MRE's for lts-saucy
Datum: 	Fri, 25 Oct 2013 01:39:50 -0700
Van: 	Kees Cook <kees at ubuntu.com>
Organisatie: 	Ubuntu
Aan: 	Maarten Lankhorst <maarten.lankhorst at canonical.com>
CC: 	technical-board at lists.ubuntu.com



The TB doesn't exist at the moment. :(
https://launchpad.net/~techboard/+members#active

But if it did, I'd want to know what the fall out looks like. How
extensively have these updates been tested? Do other X folks agree it's
okay? What does the SRU team think of it?

-Kees

On Mon, Oct 21, 2013 at 11:48:07AM +0200, Maarten Lankhorst wrote:
> Hey,
> 
> I would like to request a MRE for getting the saucy libdrm copied to precise, quantal, raring.
> Something similar has been done before, for getting the raring libdrm in quantal and precise[1].
> libdrm cannot be renamed because it's an integral part of the system. Plymouth may fail
> with older libdrm's, because it will not know about the newer pci-ids.
> 
> Similarly, I want to copy pixman from raring to quantal and precise. This package is used as
> the base rendering library for cairo and xorg. The xorg-server headers depend on pixman for
> some definitions, so I think upgrading pixman is preferred to renaming. Renaming will run into
> all sorts of issues, again because packages cannot depend on versioned depends when the
> package is renamed. The xserver in quantal has an identical abi to the one in raring, so copying
> it should be harmless, but might in the worst case cause it to expose some cairo bugs that have
> been in raring. The effects on precise I'm less certain about, I haven't noticed any issues when
> testing against precise cairo, and upstream is conservative about updating pixman.
> 
> Last, I want to request a MRE for libxi and x11proto-input in precise. The upstream pointer barriers
> have been merged, and I need to update libxi with a newer upstream version to get those pointer
> barriers. I've written a patch to allow runtime detection in unity/unity-2d, so it can use the new or
> old pointer barrier methods when it connects to the server and requests the xfixes/xi2 version.
> 
> [1] https://bugs.launchpad.net/ubuntu/+source/libdrm/+bug/1171340
> 
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-- 
Kees Cook