[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 #21 from Mauro Santos <registo.mailling at gmail.com> ---
(In reply to Alex Deucher from comment #20)
> Previously lspci would just read back from pci config space for stuff that
> was not cached which resulted in reading back all ones if the device was
> powered off, hence the rev ff.  The pci revision id is now cached so it's no
> longer read back from pci config space which is why is shows the proper
> value (rev 81).

You lost me here, I assume that by caching you mean the sysfs patch that adds
the revision field. I have tested with 4.4.52 and 4.9.11 and those do not have
that patch.

The difference between both is that with 4.4.52 the device stays powered off
when using lspci but with 4.9.11 the device is automatically powered on. This
is using all the same software versions, the only difference is booting into
different kernel versions.

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