From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 55941] New: Hybrid graphics i915/radeon. Switch to radeon
	results to black screen
Date: Fri, 29 Mar 2013 18:52:56 +0000 (UTC)
Message-ID: <bug-55941-2300@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=55941

           Summary: Hybrid graphics i915/radeon. Switch to radeon results
                    to black screen
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.8.4
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: damigos@freemail.gr
        Regression: No


Created an attachment (id=96611)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=96611)
lspci

I have installed Arch Linux on a Dell Inspiron R15 with hybrid Intel/AMD
graphics. vga_switcheroo is enabled and I can control radeon power with "echo
ON/OFF > /sys/kernel/debug/vgaswitcheroo/switch".
But when I try to switch to radeon in console with "echo DIS >
/sys/kernel/debug/vgaswitcheroo/switch" the screen turns off.
I can switch back to intel with "echo IGD >
/sys/kernel/debug/vgaswitcheroo/switch" by blind typing it, and then the screen
turns back on.

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