[Bug 15850] New: Switcheroo: LVDS on radeon not working after suspend

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=15850

           Summary: Switcheroo: LVDS on radeon not working after suspend
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.34-rc4
          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: neuro@o2.pl
        Regression: No


Created an attachment (id=26139)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=26139)
Dmesg after resume with not working LVDS

System:
Lenovo Ideapad U330 with Radeon 3450 and Intel 4500MHD
Arch Linux current with kernel 2.6.34-rc4 (+switchable graphics).

Problem:
LVDS doesn't come back after suspend while HDMI does with or without X server.

Ways to reproduce:
1. Start into console (init 3)
2. Load modules in this order: i915, radeon, fbcom
3. cat DDIS > $STATE
4. pm-suspend
5. Press any key to resume the system
8. *bam*. LVDS is off (backlight is off, no garbage, no cursor) and HDMI works.

Notes:
1. Before using switchable graphics (in Discrete only BIOS setting) suspend
resumed cleanly in X and in console.
2. I guess this might have something to do with the order I'm loading the
modules
2. My guess is: radeon tries to bring up only LVDS-0 and not LVDS-1. After
switcheroo, my LVDS is named LVDS-1 in radeon and LVDS-0 in intel, regardless
of which one is used. HDMI is only available in radeon as HDMI-0 and it gets
resumed.


Will attach dmesg.

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