[Mesa-dev] [Bug 98502] Delay when starting firefox, thunderbird or chromium and dmesg spam

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98502

--- Comment #12 from Tobias Droste <tdroste at gmx.de> ---
(In reply to Eugene Shalygin from comment #11)
> I have the same problem: Qt5 wakes up dGPU on launch [1]. However, I believe
> that this is a kernel problem: the dGPU wakes up when a program tries to
> read from /sys/bus/pci/devices/<bus id>/config. This was not happening with
> 4.7 and when I use Arch's current LTS kernel (4.4) it also works fine [2].

As soon as all the patches landed (from comment #10) there's no need to check
/sys/bus/pci/devices/<bus id>/config anymore, because there's a new API to get
that info that doesn't need to wake up the device and the problem goes away.
But right now the mesa patches are not applied as far as I can tell.

> 
> I can't believe that this is intentional [...]

It's not :-)

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