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-   -   F16: second monitor is not detected. (http://www.linux-archive.org/fedora-user/599511-f16-second-monitor-not-detected.html)

"Steven F. LeBrun" 11-17-2011 03:56 AM

F16: second monitor is not detected.
 
Recently updated my laptop to Fedora 16.* Fedora 16 is not detecting
my second, external, monitor.* The Monitor connects with an HDMI
connector or a DVI connector through a USB docking station.*
Connecting it either way does not make a difference.* What is
strange is that during the boot process, the system will display the
flash screen on the second monitor.



There was a bug filed about this before Fedora 15 was released.*
Does this bug still exist in Fedora 16?* Does anyone know if any
work has been done on it?* The bug deals with the Intel Sandybridge
chipset.* Note that the laptop screen works fine.



OS:** *** *** * Fedora 16 x86_64

Kernel:*** *** 3.1.1-1.fc16.x86_64

Desktop:*** Gnome 3.0.1

System:*** * Dell XPS 15R (i5-2410M CPU @ 2.30GHz x 4)

Graphics:*** Intel Sandybridge Mobile

Memory:**** 8 GB


Bug:**
https://bugzilla.kernel.org/show_bug.cgi?id=40592


--


**Steven F. LeBrun



Quote: "Outside of a dog, a book is man's best friend.
Inside a dog, it's too dark to read."

**** -- Groucho Marx





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Chris Bredesen 11-17-2011 05:55 AM

F16: second monitor is not detected.
 
On 11/17/2011 10:26 AM, Steven F. LeBrun wrote:
> Recently updated my laptop to Fedora 16. Fedora 16 is not detecting my
> second, external, monitor. The Monitor connects with an HDMI connector
> or a DVI connector through a USB docking station. Connecting it either
> way does not make a difference. What is strange is that during the boot
> process, the system will display the flash screen on the second monitor.
>
> There was a bug filed about this before Fedora 15 was released. Does
> this bug still exist in Fedora 16? Does anyone know if any work has been
> done on it? The bug deals with the Intel Sandybridge chipset. Note that
> the laptop screen works fine.
>
> OS: Fedora 16 x86_64
> Kernel: 3.1.1-1.fc16.x86_64
> Desktop: Gnome 3.0.1
> System: Dell XPS 15R (i5-2410M CPU @ 2.30GHz x 4)
> Graphics: Intel Sandybridge Mobile
> Memory: 8 GB
>
> Bug:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=40592

Same problem here, no resolution that I have seen. Plenty of bugs open
in Fedora complaining of this and related issues:

https://bugzilla.redhat.com/show_bug.cgi?id=698985
https://bugzilla.redhat.com/show_bug.cgi?id=680569
https://bugzilla.redhat.com/show_bug.cgi?id=680333
https://bugzilla.redhat.com/show_bug.cgi?id=715113

Love to have some attention on this but I can only guess that not
everyone is seeing this. It's the only major usability issue I have
with Fedora these days but it's a big one.

I work around the issue by using the keyboard shortcut to toggle to the
mirrored mode and then once the ext display is up, I can turn off LVDS
and fix the resolution.

In related news, you might find that once this is working, it fails to
wake up after suspend and you have to do the dance again.

-CB
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"Steven F. LeBrun" 11-17-2011 12:53 PM

F16: second monitor is not detected.
 
On 11/17/2011 01:55 AM, Chris Bredesen wrote:
> On 11/17/2011 10:26 AM, Steven F. LeBrun wrote:
>> Recently updated my laptop to Fedora 16. Fedora 16 is not detecting my
>> second, external, monitor. The Monitor connects with an HDMI connector
>> or a DVI connector through a USB docking station. Connecting it either
>> way does not make a difference. What is strange is that during the boot
>> process, the system will display the flash screen on the second monitor.
>>
>> There was a bug filed about this before Fedora 15 was released. Does
>> this bug still exist in Fedora 16? Does anyone know if any work has been
>> done on it? The bug deals with the Intel Sandybridge chipset. Note that
>> the laptop screen works fine.
>>
>> OS: Fedora 16 x86_64
>> Kernel: 3.1.1-1.fc16.x86_64
>> Desktop: Gnome 3.0.1
>> System: Dell XPS 15R (i5-2410M CPU @ 2.30GHz x 4)
>> Graphics: Intel Sandybridge Mobile
>> Memory: 8 GB
>>
>> Bug:
>>
>> https://bugzilla.kernel.org/show_bug.cgi?id=40592
> Same problem here, no resolution that I have seen. Plenty of bugs open
> in Fedora complaining of this and related issues:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=698985
> https://bugzilla.redhat.com/show_bug.cgi?id=680569
> https://bugzilla.redhat.com/show_bug.cgi?id=680333
> https://bugzilla.redhat.com/show_bug.cgi?id=715113
>
> Love to have some attention on this but I can only guess that not
> everyone is seeing this. It's the only major usability issue I have
> with Fedora these days but it's a big one.
>
> I work around the issue by using the keyboard shortcut to toggle to the
> mirrored mode and then once the ext display is up, I can turn off LVDS
> and fix the resolution.
>
> In related news, you might find that once this is working, it fails to
> wake up after suspend and you have to do the dance again.
>
> -CB

What is the keyboard shortcut to toggle mirrored mode? I was not aware
that there was one.

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Chris Bredesen 11-18-2011 05:46 AM

F16: second monitor is not detected.
 
On 11/17/2011 07:23 PM, Steven F. LeBrun wrote:

> What is the keyboard shortcut to toggle mirrored mode? I was not aware
> that there was one.

It is vendor-dependent. My Lenovo is Fn+F7. There's usually some hint
on the F keys as to which one does what in "function" mode. Look for
this kind of thing:

http://www.lincoln.edu/imc/crt_lcd_key.jpg

It will *probably* work under Fedora. I have noticed that it works at
the login screen and when logged in but not at the screen unlock screen.

YMMV...

-Cb
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"Steven F. LeBrun" 11-19-2011 11:36 AM

F16: second monitor is not detected.
 
On 11/18/2011 01:46 AM, Chris Bredesen wrote:

On 11/17/2011 07:23 PM, Steven F. LeBrun wrote:



What is the keyboard shortcut to toggle mirrored mode? I was not aware
that there was one.



It is vendor-dependent. My Lenovo is Fn+F7. There's usually some hint
on the F keys as to which one does what in "function" mode. Look for
this kind of thing:

http://www.lincoln.edu/imc/crt_lcd_key.jpg

It will *probably* work under Fedora. I have noticed that it works at
the login screen and when logged in but not at the screen unlock screen.

YMMV...

-Cb


Thanks.* I found the key that I thought should be it before sending
my last reply.* Unfortunately that key did not do anything.* I was
hoping that there might have been a Fedora key sequence.





**Steven F. LeBrun



Quote:
"Even if you are on the right track,
you will get run over if you just sit there."


**** -- Will Rogers





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Marko Vojinovic 11-20-2011 12:54 AM

F16: second monitor is not detected.
 
On Saturday 19 November 2011 07:36:45 Steven F. LeBrun wrote:
> On 11/18/2011 01:46 AM, Chris Bredesen wrote:
> > On 11/17/2011 07:23 PM, Steven F. LeBrun wrote:
> >> What is the keyboard shortcut to toggle mirrored mode? I was not
> >> aware that there was one.
> >
> > It is vendor-dependent. My Lenovo is Fn+F7. There's usually some hint
> > on the F keys as to which one does what in "function" mode. Look for
> > this kind of thing:
> >
> > http://www.lincoln.edu/imc/crt_lcd_key.jpg
> >
> > It will *probably* work under Fedora. I have noticed that it works at
> > the login screen and when logged in but not at the screen unlock screen.
>
> Thanks. I found the key that I thought should be it before sending my
> last reply. Unfortunately that key did not do anything. I was hoping
> that there might have been a Fedora key sequence.

Those custom vendor shortcuts may or may not be supported by Fedora, depending
on the particular laptop model you have.

But the certain way to see if your second monitor is detected is to look at
the output of xrandr in the console.

HTH, :-)
Marko





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