DVI/VGA/HDI mess on Radeon HD 6570

DVI/VGA/HDI mess on Radeon HD 6570

[Boszormenyi Zoltan]

Hi,

about two months ago I bought a Radeon HD 6570 with
2GB memory for my main computer and I have a single
monitor connected to it, until now via VGA D-Sub.

Last week our secondary TV died (it was 15 years old, R.I.P.)
so I bought a nice 32" LED TV which has 3 external HDMI
connectors.

The HD 6570 has one DVI-D, one HDMI and one VGA connectors
so I thought it would be fun to allow the family to watch videos
while I can also work on the computer.

Here comes my problem: no matter which connectors I use
for the monitor (DVI-D or D-Sub), if the TV is switched on,
HDMI comes up as primary display. The result: GNOME 3
workspaces are switchable on the TV but a single workspace
is visible on my monitor. This would be the perfect setup
if I can reverse the roles of the TV and the monitor.

"man radeon" had an option which I tried but didn't help:
Option "ZaphodHeads" "DVI-0,HDMI-0"

Is there any other option that does what I want?

Thanks in advance,
Zoltán Böszörményi

Re: DVI/VGA/HDI mess on Radeon HD 6570

[David Airlie]

> 
> about two months ago I bought a Radeon HD 6570 with
> 2GB memory for my main computer and I have a single
> monitor connected to it, until now via VGA D-Sub.
> 
> Last week our secondary TV died (it was 15 years old, R.I.P.)
> so I bought a nice 32" LED TV which has 3 external HDMI
> connectors.
> 
> The HD 6570 has one DVI-D, one HDMI and one VGA connectors
> so I thought it would be fun to allow the family to watch videos
> while I can also work on the computer.
> 
> Here comes my problem: no matter which connectors I use
> for the monitor (DVI-D or D-Sub), if the TV is switched on,
> HDMI comes up as primary display. The result: GNOME 3
> workspaces are switchable on the TV but a single workspace
> is visible on my monitor. This would be the perfect setup
> if I can reverse the roles of the TV and the monitor.
> 
> "man radeon" had an option which I tried but didn't help:
> Option "ZaphodHeads" "DVI-0,HDMI-0"

xrandr --output DVI-0 --primary

or open the gnome display applet and drag the bar from one monitor to another.

Dave.

Re: DVI/VGA/HDI mess on Radeon HD 6570

[Boszormenyi Zoltan]

2011-12-19 18:14 keltezéssel, David Airlie írta:
>> about two months ago I bought a Radeon HD 6570 with
>> 2GB memory for my main computer and I have a single
>> monitor connected to it, until now via VGA D-Sub.
>>
>> Last week our secondary TV died (it was 15 years old, R.I.P.)
>> so I bought a nice 32" LED TV which has 3 external HDMI
>> connectors.
>>
>> The HD 6570 has one DVI-D, one HDMI and one VGA connectors
>> so I thought it would be fun to allow the family to watch videos
>> while I can also work on the computer.
>>
>> Here comes my problem: no matter which connectors I use
>> for the monitor (DVI-D or D-Sub), if the TV is switched on,
>> HDMI comes up as primary display. The result: GNOME 3
>> workspaces are switchable on the TV but a single workspace
>> is visible on my monitor. This would be the perfect setup
>> if I can reverse the roles of the TV and the monitor.
>>
>> "man radeon" had an option which I tried but didn't help:
>> Option "ZaphodHeads" "DVI-0,HDMI-0"
> xrandr --output DVI-0 --primary
>
> or open the gnome display applet and drag the bar from one monitor to another.

Thanks.
Is this setting permanent after reboot and applies to GDM, too?

>
> Dave.
>

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Re: DVI/VGA/HDI mess on Radeon HD 6570

[Adam Jackson]

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On Mon, 2011-12-19 at 18:19 +0100, Boszormenyi Zoltan wrote:

> Thanks.
> Is this setting permanent after reboot and applies to GDM, too?

It's stored in the session, so if there's not a "Make system default"
button in the UI, then no it won't affect gdm.

- ajax

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Re: DVI/VGA/HDI mess on Radeon HD 6570

[Boszormenyi Zoltan]

2011-12-19 18:42 keltezéssel, Adam Jackson írta:
> On Mon, 2011-12-19 at 18:19 +0100, Boszormenyi Zoltan wrote:
>
>> Thanks.
>> Is this setting permanent after reboot and applies to GDM, too?
> It's stored in the session, so if there's not a "Make system default"
> button in the UI, then no it won't affect gdm.

Thanks. As I am logged in as my user, there's no such button.
How can I set it as the system default? It was a long time ago
when GNOME allowed a root login.

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Re: DVI/VGA/HDI mess on Radeon HD 6570

[Adam Jackson]

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On Mon, 2011-12-19 at 18:56 +0100, Boszormenyi Zoltan wrote:

> Thanks. As I am logged in as my user, there's no such button.
> How can I set it as the system default? It was a long time ago
> when GNOME allowed a root login.

Ideally, gnome would implement that button.

Failing that you can set Option "Primary" for the appropriate monitor
section in xorg.conf.

- ajax

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Re: DVI/VGA/HDI mess on Radeon HD 6570

[Boszormenyi Zoltan]

2011-12-19 19:31 keltezéssel, Adam Jackson írta:
> On Mon, 2011-12-19 at 18:56 +0100, Boszormenyi Zoltan wrote:
>
>> Thanks. As I am logged in as my user, there's no such button.
>> How can I set it as the system default? It was a long time ago
>> when GNOME allowed a root login.
> Ideally, gnome would implement that button.
>
> Failing that you can set Option "Primary" for the appropriate monitor
> section in xorg.conf.
>
> - ajax

I have found a way to match GDM's behaviour to what I have
set in my session. This is embarrassingly simple. After setting
up the monitors in the GNOME display applet:

sudo cp ~/.config/monitors.xml /var/lib/gdm/.config/

Next time GDM restarted, it behaved the way I set up.

Best regards,
Zoltán Böszörményi

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