[Bug 86043] Optimus issue with libdrm 2.4.58

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86043

--- Comment #13 from Emil Velikov <emil.l.velikov at gmail.com> ---
(In reply to Tvrtko Ursulin from comment #12)
> I think we'll need to pull in someone from Steam since Valgrind reports some
> mismatched frees in vgui2_s.so, steamclient.so and steamui.so. 
> 
> There are not debug symbols so impossible to guess what area of the code is
> that.
> 
I'm assuming Jordan can coordinate that with Valve. Afaics he is the one
assigned for the issue over at github.

> Then this also looks pretty bad:
> 
> ERROR: ld.so: object
> '/home/vedran/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from
> LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored.
> ERROR: ld.so: object
> '/home/vedran/.local/share/Steam/ubuntu12_32/gameoverlayrenderer.so' from
> LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32): ignored
> 
Those should be harmless, as steam LD_PRELOADs a bunch of libraries. Afaik
steam is 32bit, while Vedran was running a 64bit system - thus the messages. 

There are a couple of other interesting bits in the log:
 - Alarming heap stats (allocated ~770 MiB, in-use at exit ~220MiB)
 - Invalid memory access in various modules - invalid reads in various steam
runtime components, alarming number of invalid writes in i965_dri.so.

The latter one perhaps should be looked into closer ?

> Please if someone knows any Steam devs CC them here?
Afaict unless a person is known* by bugzilla one cannot CC them. For example
one cannot CC your @intel email, so I've opted for the known @linux.intel one.

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