[Bugme-new] [Bug 21002] New: external monitor don't turn on at boot

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Sat Oct 23 15:03:31 PDT 2010


https://bugzilla.kernel.org/show_bug.cgi?id=21002

           Summary: external monitor don't turn on at boot
           Product: ACPI
           Version: 2.5
    Kernel Version: 2.6.32-gentoo-r7
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Power-Video
        AssignedTo: acpi_power-video at kernel-bugs.osdl.org
        ReportedBy: hariseldon78 at gmail.com
        Regression: No


Hello. I have a Gentoo linux installed on a MacBook Pro. 
I use Refit as first boot loader, then lilo as linux boot loader.
When i select the linux boot from refit the external monitor turns to standby.
Linux boot well and only when it reaches the Xorg loading the external monitor
turns on again.

If i switch to a virtual terminal with Ctrl+Alt+F1 the external monitor turns
off, then switching to the X screen with Ctrl+Alt+F7 it turns on again.

I would like to be able to use the console from the external monitor, but i
cannot force it to wake up. 

I've tried vbetool to send a dpms signal, but it just change the main monitor
state.

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