> There have been plenty of reports opened wrt libudev/libgcc_s/libstdc++ on 
> their trackers and seemingly limited interest to fix things.

Yes, there are a bunch of issues reported for this already. But it looks like 
Valve has no plan to fix these issues. For example,
https://github.com/ValveSoftware/steam-runtime/issues/13

IMHO, we can probably use sysfs first, and when the issue is solved by Valve, 
we can switch to the udev solution later.

Regards,
Jammy

-----Original Message-----
From: Emil Velikov [mailto:emil.l.veli...@gmail.com] 
Sent: Friday, August 14, 2015 5:08 PM
To: Kai Wasserbäch
Cc: Zhou, Jammy; Daniel Vetter; ML dri-devel
Subject: Re: [PATCH 1/5] drm: add interface to get drm devices on the system v2

On 14 August 2015 at 09:26, Kai Wasserbäch <kai at dev.carbon-project.org> 
wrote:
> Emil Velikov wrote on 14.08.2015 10:17:
>> On 14 August 2015 at 08:59, Kai Wasserbäch <kai at dev.carbon-project.org> 
>> wrote:
>>> Zhou, Jammy wrote on 14.08.2015 07:59:
>>>> We tried several different ways already for the enumeration interface 
>>>> (libpciaccess, libudev, etc). But we ran into some problems with these 
>>>> options for example when run Steam games which ships 32bit libraries 
>>>> (including libudev) in the steam runtime, so finally we decided to use 
>>>> sysfs directly to avoid introducing some additional dependencies into 
>>>> libdrm.
>>>
>>> The reason sounds wrong. There was a similar discussion over at 
>>> Mesa. I think you (as in hardware/driver vendors like 
>>> AMD/Intel/Nvidia) need to push Valve (or the game devs through Valve 
>>> or directly) to fix their setup. Steam runtime is fine and all, but 
>>> please only pre-load it, if needed (ie. library foo is missing on 
>>> the system and can't be installed through the package manager). IIRC 
>>> the VMWare guys said in the Mesa discussion, they have a script in 
>>> place for their virtualisation products, that checks whether a library 
>>> needs to be loaded from their "baseline directory" or from the system.
>>>
>>> Working around a bug/design flaw in Steam's Linux version doesn't 
>>> sound like a supportable solution in the long run. As long as you 
>>> let them get away with that, you will face this problem over and 
>>> over with different libraries. (For me it's usually libstdc++ 
>>> (needed by LLVM), libncurses and a few X(CB) libraries I need to 
>>> remove from Steam, before anything works. Though I do have script 
>>> for that, that I can run after every upgrade, this is not a solution 
>>> for everyone.)
>>>
>> Helping and applying pressure to resolve the issue is the way to go.
>> But until that is resolved it's great to have a solution that does 
>> not lead to a crash. It feels rude towards you and other users to 
>> deliberately use the problematic combo and expect from you to remove 
>> libfoo.so.
>
> Well, I'd rather remove stuff from Steam's runtime than burden you and 
> other developers with maintaing code that is unnecessrily ugly. 
> (Though that's obviously just my opinion.)
>
>> When things get sorted out, we can easily replace this (a tad ugly
>> implementation) with libudev.
>
> As long as you allow this behaviour by working around it,
There is a saying (roughly translated to) "The wiser man always steps back". Or 
we could/should be like Linus - "F* you $company"

> I don't see Valve/game
> developers "invest" in a real solution (because it works now). 
> Businesses usually only move from a position, when there's outside 
> pressure and a clear advantage to do so (here: no bug reports about crashing 
> games).
>
There have been plenty of reports opened wrt libudev/libgcc_s/libstdc++ on 
their trackers and seemingly limited interest to fix things.

This is a catch 20/20 afaics. "FOSS drivers do not work thus they are s**t" is 
how a sizeable hunk of people think. They rarely consider what the actual issue 
might be, because "I installed the nvidia/amd proprietary drivers and things 
work now".

> Anyway, this was just my two cents and you can obviously decide in any 
> way you deem to be the best.
>
Personally, I'd love if there was no "options" and we can just use libfoo. Who 
knows Valve devs might get a wake up call and fix the problem ?


-Emil
P.S. Fun fact: Valve's annual "TI" Dota2 tournament managed to accumulate some 
66 million USD gross income, over 100 days.

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