[Bug 43835] System crashes when radeon firmware blob (R520_cp.bin) is installed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=43835

--- Comment #16 from Camaleón <noelamac at gmail.com> 2011-12-16 13:23:03 PST ---
(In reply to comment #15)
> (In reply to comment #13)
> > 1/ "firmware-linux-nonfree" package is not installed, or
> > 2/ Option "NoAccel" "True" is set at xorg.conf
> 
> These are mostly equivalent, as acceleration is not possible without the
> microcode with KMS.
> 
> What might be interesting would be to try GNOME fallback mode with KMS disabled
> (radeon.modeset=0) with and without firmware-linux-nonfree installed. Please
> attach dmesg and Xorg.0.log for both cases again. (The r300g driver doesn't
> work with KMS disabled)

The user reports that he has tried to disable KMS by all these means:

- Appending "nomodeset" to kernel line
- Appending "radeon.modeset=0" to the kernel line
- Appending "modeset=0" to the kernel line
- Blacklisting radeon module to avoid from loading

But all he gets is a system hang with the following message:

***
Could not update ICEautorithy file /var/lib/gdm3/.ICEauthority
Closing session
***

And that's all. He's now stuck at there, forced to load his MacOS X partition
in order to get the system up and running.

> BTW, does the GNOME fallback mode end up using the same window manager
> (Metacity?) with and without acceleration being enabled?

I don't know... anyhow, now I have to help the user to restore back his Debian
system to an operating state.

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