Re: Laptop doesn't know which display to use when docked.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Terry Polzin <foxec208 <at> wowway.com> writes:

> 
> I am running xfce on F17 completely patched and current.
> 
> My laptop is a HP probook 6460b.  When I boot it docked the grub screen
> appears on the external display.  When the boot has completed the
> background screen is displayed on the external display. I get no login
> prompt on the external display.  I press enter a couple of times the
> login display will appear and I'll log in then the external display goes
> dark.  I open up the laptop and it's display has the desktop on it and I
> have to manually switch to the external display and discontinue use of
> the laptop display.  If both displays are selected for use the whole
> thing wants to act like a twin head setup which I don't want.
> 
> What do I have to do to get the laptop to use the external display when
> docked and it's own display when it isn't automagically. To undock the
> laptop I have to reverse the display procedure of course.  This also
> makes it impossible to "undock and run" without making manual changes as
> to which display to use.
> 

I had the opposite problem.  When I am at work I run my laptop in dual head
mode.  If I'm travelling, I just have the laptop.  The laptop (HP Pavilion G7)
seemed to think that the external monitor was always attached and would not
switch to just the internal display.  This is with FC-16 and xfce.

My first work-around was to boot in graphical mode.  All I had to do was wait
until the system had put up the login screen and then I could hit the screen
brightness (brighter) adjustment button a few times and there was my login
screen.  Hitting the button prior to X starting had no effect (good or bad). I
had a completely black screen until X was up and then I could adjust the
brightness.  Likewise, the system would only use the external monitor, if
attached, while booting but, since I could see the boot progress on it, I knew
when I could adjust the brightness of the laptop's internal monitor.  Also, the
display select button had no effect.

I did some digging and finally found a bug report that mentioned setting a
couple of kernel parameters: acpi_backlight=vendor acpi_osi=linux
video.brightness_switch_enabled=1.  You might try playing with these to see if
they have any affect on your issue.

Cheers,
Dave


-- 
users mailing list
users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe or change subscription options:
https://admin.fedoraproject.org/mailman/listinfo/users
Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
Have a question? Ask away: http://ask.fedoraproject.org


[Index of Archives]     [Older Fedora Users]     [Fedora Announce]     [Fedora Package Announce]     [EPEL Announce]     [EPEL Devel]     [Fedora Magazine]     [Fedora Summer Coding]     [Fedora Laptop]     [Fedora Cloud]     [Fedora Advisory Board]     [Fedora Education]     [Fedora Security]     [Fedora Scitech]     [Fedora Robotics]     [Fedora Infrastructure]     [Fedora Websites]     [Anaconda Devel]     [Fedora Devel Java]     [Fedora Desktop]     [Fedora Fonts]     [Fedora Marketing]     [Fedora Management Tools]     [Fedora Mentors]     [Fedora Package Review]     [Fedora R Devel]     [Fedora PHP Devel]     [Kickstart]     [Fedora Music]     [Fedora Packaging]     [Fedora SELinux]     [Fedora Legal]     [Fedora Kernel]     [Fedora OCaml]     [Coolkey]     [Virtualization Tools]     [ET Management Tools]     [Yum Users]     [Yosemite News]     [Gnome Users]     [KDE Users]     [Fedora Art]     [Fedora Docs]     [Fedora Sparc]     [Libvirt Users]     [Fedora ARM]

  Powered by Linux