Bug 21002

Summary: external monitor don't turn on at boot
Product: Drivers Reporter: Roberto Previdi (hariseldon78)
Component: Video(DRI - non Intel)Assignee: drivers_video-dri
Status: RESOLVED OBSOLETE    
Severity: normal CC: alan, rui.zhang
Priority: P1    
Hardware: i386   
OS: Linux   
Kernel Version: 2.6.32-gentoo-r7 Subsystem:
Regression: No Bisected commit-id:
Bug Depends on:    
Bug Blocks: 56331    
Attachments: acpidump.output
dmesg.output
lspci.output
kernel_config

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]
acpidump.output
Comment 2 Roberto Previdi 2010-10-23 22:04:56 UTC 
Created attachment 34562 [details]
dmesg.output
Comment 3 Roberto Previdi 2010-10-23 22:05:24 UTC 
Created attachment 34572 [details]
lspci.output
Comment 4 Roberto Previdi 2010-10-23 22:06:59 UTC 
Created attachment 34582 [details]
kernel_config
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