Arch Linux

KlavKalashj

Member

Registered: 2008-10-09

Posts: 376

KDM/KDE wrong resolution, HDMI

Whenever my HDMI tv is connected and I start X (both from boot and restart X) KDM changes my screen resolution from 1366x768(both screens, cloned, marked as 'auto' in system settings) to 1024x768, cloned. I don't understand why. When I boot I have a perfect cloned KMS, but KDM changes it. When the tv is disconnected it's all good on the laptop screen. Any ideas?

Edit: this is on Intel hardware, kernel 2.6.34, KDE 4.4.5.

Last edited by KlavKalashj (2010-07-03 18:17:57)

KlavKalashj

Member

Registered: 2008-10-09

Posts: 376

Re: KDM/KDE wrong resolution, HDMI

37 views and nobody knows?

Watermel0n

Member

Registered: 2010-03-10

Posts: 60

Re: KDM/KDE wrong resolution, HDMI

This is a feature, not a bug
X notices that an external source is connected and tries to give your screen and the TV the same resolution and the same refresh rate.
You can change it using xrandr, a good GUI is lxrandr, you should try it

KlavKalashj

Member

Registered: 2008-10-09

Posts: 376

Re: KDM/KDE wrong resolution, HDMI

This is a feature, not a bug
X notices that an external source is connected and tries to give your screen and the TV the same resolution and the same refresh rate.
You can change it using xrandr, a good GUI is lxrandr, you should try it

Yeah, well, I have a script autorunning using xrandr... But I want it to be right from the start. The tv is 1360x768 and laptop 1366x768 so it's not the exact same resolution, but cloning mode works, it just cuts a few pixels on the right side on the tv... But maybe that is the problem? It automatically chooses the highest _exact_ resolution?

Watermel0n

Member

Registered: 2010-03-10

Posts: 60

Re: KDM/KDE wrong resolution, HDMI

Yes I think so. Well that is what happens when I connect my tv. Maybe you can disable this somewhere in xorg.conf.

KlavKalashj

Member

Registered: 2008-10-09

Posts: 376

Re: KDM/KDE wrong resolution, HDMI

I don't have a xorg.conf... I just rely on the automatics The thing is, this was no issue on Ubuntu, so I guess it should be possible. Also in Ubuntu, I had no xorg.conf.