Bug 21002 - external monitor don't turn on at boot
Summary: external monitor don't turn on at boot
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: i386 Linux
: P1 normal
Assignee: drivers_video-dri
Depends on:
Blocks: 56331
  Show dependency tree
Reported: 2010-10-23 22:03 UTC by Roberto Previdi
Modified: 2013-04-09 06:23 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.32-gentoo-r7
Regression: No
Bisected commit-id:

acpidump.output (161.28 KB, application/octet-stream)
2010-10-23 22:04 UTC, Roberto Previdi
dmesg.output (243.65 KB, application/octet-stream)
2010-10-23 22:04 UTC, Roberto Previdi
lspci.output (2.12 KB, application/octet-stream)
2010-10-23 22:05 UTC, Roberto Previdi
kernel_config (68.26 KB, application/octet-stream)
2010-10-23 22:06 UTC, Roberto Previdi

Description Roberto Previdi 2010-10-23 22:03:30 UTC
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.
Comment 1 Roberto Previdi 2010-10-23 22:04:25 UTC
Created attachment 34552 [details]
Comment 2 Roberto Previdi 2010-10-23 22:04:56 UTC
Created attachment 34562 [details]
Comment 3 Roberto Previdi 2010-10-23 22:05:24 UTC
Created attachment 34572 [details]
Comment 4 Roberto Previdi 2010-10-23 22:06:59 UTC
Created attachment 34582 [details]
Comment 5 Roberto Previdi 2010-10-23 22:08:49 UTC
the external monitor is an LG FLATRON M228WDP, connected with an adapter 

 "mini display -> vga"
Comment 6 Zhang Rui 2010-10-26 00:43:12 UTC
This sounds more like a graphics driver problem than an ACPI issue.
Comment 7 Alan 2012-08-14 11:22:08 UTC
Closing as obsolete, if this is still seen with a modern kernel please update/re-open

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