[Bug 36642] Oops on vgaswitcheroo from intel IGD to radeon DIS.

[Bug 36642] Oops on vgaswitcheroo from intel IGD to radeon DIS.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36642


Daniel Vetter <daniel@ffwll.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daniel@ffwll.ch
          Component|Video(DRI - Intel)          |Video(DRI - non Intel)
         AssignedTo|drivers_video-dri-intel@ker |drivers_video-dri@kernel-bu
                   |nel-bugs.osdl.org           |gs.osdl.org




--- Comment #2 from Daniel Reurich <daniel@centurion.net.nz>  2011-06-04 13:15:16 ---
Sorry should have mentioned it happened on a Hewlett Packard Pavilion
DV7-6015tx laptop (17.3" Widescreen with after market ram upgrade to 8GB and
Intel 160GB MLC SSD.

Also, to clarify, the order of events was:
1) issued "echo DDIS > /sys/kernel/debug/vgaswitcheroo/switch" in ssh remote
terminal.
2) issued "/etc/init.d/gdm3 restart"
3) gdm shutdown and the lcd screen went blank and my ssh session froze.
4) attempted to establish another ssh session.  This failed too.
5) attempted ctrl-alt-delete followed by pressing the power button.

I currently only have remote (ssh) access to the machine and rely on others to 
be the eyes and ears.

I'm trying to get the ability to switch between the Integrated intel graphics
and the Discrete AMD/ATI radeon graphics devices.

Keen to help debug this further.

Daniel.

--- Comment #3 from Daniel Vetter <daniel@ffwll.ch>  2012-03-25 12:40:22 ---
I'm gonna blame radeon on this one ;-) Especially since the hang seems to only
happen when we start rendering on the radeon gpu (gdm3 starting), and at that
point drm/i915 shouldn't interfere with anything anymore at all ...

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[Bug 36642] Oops on vgaswitcheroo from intel IGD to radeon DIS.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36642


Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com




--- Comment #4 from Alex Deucher <alexdeucher@gmail.com>  2012-03-25 13:35:52 ---
Most recent hybrid laptops are muxless so the laptop panel is not actually
connected to the discrete chip.  Most likely X is failing to start on radeon
since the are no connected displays.  The only way to support these systems is
with fairly major changes to the X server to support decoupled display and
rendering.  Work has begun on these changes, but they are not ready for end
users yet.  Can you attach your full dmesg and xorg log after trying to switch
to radeon?

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[Bug 36642] Oops on vgaswitcheroo from intel IGD to radeon DIS.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=36642


Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |alan@lxorguk.ukuu.org.uk
         Resolution|                            |INSUFFICIENT_DATA




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