External monitor not working in newer Kernels

[Thomas Waldecker]

Hi,

my external monitor (HDMI) stopped to work after the update from
kernel 3.7.8-202.fc18.i686

I'm using MATE and with the System > Preferences > Monitor Preferences
tool I'm trying to enable the second screen.

The second screen is just black in kernel 3.8.3 and 3.8.2.

Please let me know if you need some debugging info.

Kind regards,
Thomas Waldecker

[Paolo Galtieri]

On 03/19/13 01:39, Thomas Waldecker wrote:
> Hi,
>
> my external monitor (HDMI) stopped to work after the update from
> kernel 3.7.8-202.fc18.i686
>
> I'm using MATE and with the System > Preferences > Monitor Preferences
> tool I'm trying to enable the second screen.
>
> The second screen is just black in kernel 3.8.3 and 3.8.2.
>
> Please let me know if you need some debugging info.
>
> Kind regards,
> Thomas Waldecker

I'm running mate on F18 and I cannot configure my monitor.  It shows up 
as unknown with a resolution of 1280x1024 when the monitor is capable of 
supporting 1920x1200.  In fact the monitor is plugged into a kvm switch 
with 2 other systems, one running F14 and the other running F16.  The 
F14 and F16 systems see the monitor and configure it correctly to 
1920x1200.  I have filed bug 922596 on this.  It also fails with Gnome 
3.0.  There it detects the monitor as laptop and sets the resolution to 
1280x1024.  The monitor is actually a Gateway FPD2485W.

Paolo

[Thomas Waldecker]

Hi Paolo,

thanks for your reply and your pointer to the bugreport. I'll check it out.

This is the bug report as direct link for reference:
https://bugzilla.redhat.com/show_bug.cgi?id=922596

Thomas

2013/3/19 Paolo Galtieri :
> On 03/19/13 01:39, Thomas Waldecker wrote:
> > Hi,
> >
> > my external monitor (HDMI) stopped to work after the update from
> > kernel 3.7.8-202.fc18.i686
> >
> > I'm using MATE and with the System > Preferences > Monitor Preferences
> > tool I'm trying to enable the second screen.
> >
> > The second screen is just black in kernel 3.8.3 and 3.8.2.
> >
> > Please let me know if you need some debugging info.
> >
> > Kind regards,
> > Thomas Waldecker
>
> I'm running mate on F18 and I cannot configure my monitor.  It shows up as
> unknown with a resolution of 1280x1024 when the monitor is capable of
> supporting 1920x1200.  In fact the monitor is plugged into a kvm switch with
> 2 other systems, one running F14 and the other running F16.  The F14 and F16
> systems see the monitor and configure it correctly to 1920x1200.  I have
> filed bug 922596 on this.  It also fails with Gnome 3.0.  There it detects
> the monitor as laptop and sets the resolution to 1280x1024.  The monitor is
> actually a Gateway FPD2485W.
> Paolo
>
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