The Radeon driver is not being loaded the zero there is telling that it is not being used by any service or device.
That is why you don't get higher resolutions.
Solutions I can think of:
- Change the driver to VESA or something else(the open drivers) it should work as a work around but you won't get any 3D acceletarion with VESA which you can confirm typing "glxinfo | grep -i rendering"
ps: First you should see if the VESA driver is load with "lsmod | grep -i vesa", if it shows nothing it is not loaded so you should try that the which driver is being used with "lspci -k | grep -i radeon", the lspci also will give you all the other drivers that are installed and you can use for the radeon card.
- Try and find out if the Radeon driver you are using is the one for your Radeon IGP 330M/340/, if you are lucky is just the wrong driver and you just need to install one that works if it is not that, be prepared to endure a lot of pain probably.
You may see what it is happening using "cat /var/log/Xorg.0.log | grep -i radeon" (maybe not sure) also there may be errors with the flag (EE) so if you do "cat /var/log/Xorg.0.log | grep -i \(EE\)" you should get all the errors and also there are warnings and notices.
here are the markers the Xorg.0.log uses
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
I can't really help you with the Radeon thing as I don't use that but I can point you to some places where there may be some answers.
The R100 series includes the IGP 340M if your card is that one you should use the open source drivers.
To try and get the exact model you could try "lsmod -vv | grep -i radeon" or "lspci -k | grep -i radeon"
which should give you something like this:
Subsystem: nVidia Corporation Device 0545
Kernel driver in use: nvidia
Kernel modules: nvidia, nouveau, nvidiafb
If everything else fails go to the here:
And under X-Server file a bug report.