ATI Radeon HD 4550

[jocko]

my xorg.conf dont even have a

Section "Screen"

It's probably enough to just make the changes to the monitor section.

Edit:
What does your xorg.conf look like?

[jtomasrl]

It's probably enough to just make the changes to the monitor section.

Edit:
What does your xorg.conf look like?

http://ubuntuforums.org/showpost.php...80&postcount=5

[jocko]

http://ubuntuforums.org/showpost.php...80&postcount=5

Hmmm... Since it did not look complete, I thought that was only part of it...

Try this:
1. Backup your current xorg.conf:

sudo mv /etc/X11/xorg.conf /etc/X11/xorg.con.bak

2. Make a new xorg.conf:

sudo aticonfig --force --initial

3. Restart x (Alt+SysRq+K, or log out and back in).

Can you set your refresh rate now?
If not, add your monitor's specs to the monitor section in xorg.conf and try again.
If you don't know exactly what to put where, just post your new xorg.conf and the make and model of your monitor (or the horizontal sync and vertical refresh ranges it supports if you know them).

[jtomasrl]

Didnt work

Section "ServerLayout"
	Identifier     "aticonfig Layout"
	Screen      0  "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Module"
EndSection

Section "Monitor"
	Identifier   "aticonfig-Monitor[0]-0"
	Option	    "VendorName" "ATI Proprietary Driver"
	Option	    "ModelName" "Generic Autodetecting Monitor"
	Option	    "DPMS" "true"
    HorizSync    30-110
    VertRefresh  50-150
EndSection

Section "Device"
	Identifier  "aticonfig-Device[0]-0"
	Driver      "fglrx"
	BusID       "PCI:2:0:0"
EndSection

Section "Screen"
	Identifier "aticonfig-Screen[0]-0"
	Device     "aticonfig-Device[0]-0"
	Monitor    "aticonfig-Monitor[0]-0"
	DefaultDepth     24
    SubSection "Display"
        Viewport   0 0
        Depth     24
        Modes        "1600x1200" "1280x1024" "1152x864" "1024x768"
    EndSubSection
EndSection

[jocko]

Didnt work

Section "ServerLayout"
    Identifier     "aticonfig Layout"
    Screen      0  "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Module"
EndSection

Section "Monitor"
    Identifier   "aticonfig-Monitor[0]-0"
    Option        "VendorName" "ATI Proprietary Driver"
    Option        "ModelName" "Generic Autodetecting Monitor"
    Option        "DPMS" "true"
    HorizSync    30-110
    VertRefresh  50-150
EndSection

Section "Device"
    Identifier  "aticonfig-Device[0]-0"
    Driver      "fglrx"
    BusID       "PCI:2:0:0"
EndSection

Section "Screen"
    Identifier "aticonfig-Screen[0]-0"
    Device     "aticonfig-Device[0]-0"
    Monitor    "aticonfig-Monitor[0]-0"
    DefaultDepth     24
    SubSection "Display"
        Viewport   0 0
        Depth     24
        Modes        "1600x1200" "1280x1024" "1152x864" "1024x768"
    EndSubSection
EndSection

Are those refresh and sync rates from your monitor's specs, or did you just copy-paste mine? Note that if you get the driver to use those values, and they are NOT the correct ones for your monitor you may end up with an "out of sync" monitor, which will either just turn it off or in worst case even damage it.

I found something else that could help:
First, you may need to disable xrandr to let the driver take control of the refresh rates:
Add this to the "device" section in xorg.conf:

Option      "EnableRandR12" "false"

The fglrx driver by some reason saves it's settings in /etc/ati/amdpcsdb, and those settings will override those in xorg.conf. To get the settings in xorg.conf to stick, you have to run this:

sudo aticonfig --input=/etc/X11/xorg.conf --tls=1