How to add new resolution?

[janderpola]

I?m using Ubuntu 10.10 32 bits with ATI Mobility Radeon HD 4500 Series on a Dell Studio 1558, and my problem is i can?t set a properly resolution.

I can set it to 1920x1080, wich in most cases is to high that makes everything so little, and the next properly resolution (same proportions) is 1280x720, wich i find too big sometines, so i?m triying to set an intermediate resolution, in this case 1600x900 wich keeps the proportions of the screen, because the rest of the resolutions doesn?t keep the proportions.

I?m using propietary (fglrx) driver, and here is what i have tried:

- Adding a "Modes 1600x900" section in xorg.conf file, wich looks like this:

Section "ServerLayout"
Identifier "amdcccle Layout"
Screen 0 "amdcccle-Screen[2]-0" 0 0
EndSection

Section "Files"
EndSection

Section "Module"
Load "glx"
EndSection

Section "ServerFlags"
Option "Xinerama" "off"
EndSection

Section "Monitor"
Identifier "0-LVDS"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
Option "PreferredMode" "1920x1080"
Option "TargetRefresh" "60"
Option "Position" "0 0"
Option "Rotate" "normal"
Option "Disable" "false"
EndSection

Section "Monitor"
Identifier "0-DFP1"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
Option "PreferredMode" "1920x1080"
Option "TargetRefresh" "60"
Option "Position" "0 0"
Option "Rotate" "normal"
Option "Disable" "false"
EndSection

Section "Device"
Identifier "Default Device"
Driver "fglrx"
EndSection

Section "Device"
Identifier "amdcccle-Device[2]-0"
Driver "fglrx"
Option "Monitor-LVDS" "0-LVDS"
BusID "PCI:2:0:0"
EndSection

Section "Screen"
Identifier "Default Screen"
DefaultDepth 24
EndSection

Section "Screen"
Identifier "amdcccle-Screen[2]-0"
Device "amdcccle-Device[2]-0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1600x900"
EndSubSection
EndSection

That makes nothing, because i can?t see the 1600x900 anywhere to try it.

- I have tried with xrandr, following this tutorial, where i make this:

plaos@plaos-laptop:~$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 720, maximum 1920 x 1920
LVDS connected 1280x720+0+0 (normal left inverted right x axis y axis) 345mm x 194mm
1920x1080 59.9 +
1680x1050 59.9 +
1400x1050 59.9 +
1280x1024 59.9 +
1440x900 59.9 +
1280x960 59.9 +
1280x800 59.9 +
1152x864 59.9 +
1280x768 59.9 +
1280x720 59.9*+
1024x768 59.9 +
1024x600 59.9 +
800x600 59.9 +
800x480 59.9 +
720x480 59.9 +
640x480 59.9 +
DFP1 disconnected (normal left inverted right x axis y axis)
CRT2 disconnected (normal left inverted right x axis y axis)

plaos@plaos-laptop:~$ cvt 1600 900
# 1600x900 59.95 Hz (CVT 1.44M9) hsync: 55.99 kHz; pclk: 118.25 MHz
Modeline "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync

plaos@plaos-laptop:~$ xrandr --newmode "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync

After this, when i exec xrandr again i get this after CRT2 discon...

CRT2 disconnected (normal left inverted right x axis y axis)
1600x900_60.00 (0xe2) 118.2MHz
h: width 1600 start 1696 end 1856 total 2112 skew 0 clock 56.0KHz
v: height 900 start 903 end 908 total 934 clock 59.9Hz

And if i try to add the resolution, i get this error:

plaos@plaos-laptop:~$ xrandr --addmode LVDS 1600x900_60.00
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 155 (RANDR)
Minor opcode of failed request: 18 (RRAddOutputMode)
Serial number of failed request: 27
Current serial number in output stream: 28

- I finally tried using aticonfig, where manual section says:

--resolution=Screen#,W1xH1,W2xH2,W3xH3,...
Set the modes for the specified screen. You may specify several
resolutions separated by commas.
Screens start at 0. You can use 1 for dual-head

So when i try this, i get the next:

plaos@plaos-laptop:~$ sudo aticonfig --resolution=0, 1600x900
[sudo] password for plaos:
error at set screen resolution : screen0 does not exist
aticonfig: parsing the command-line failed.

I am desperated, which metod i should follow, and where i am doing something wrong?

[Kano]

No! Do not set the res, change the dpi! I do not use ubuntu, but most likely you will find the gdm.conf to be the file to increase dpi.

[janderpola]

No! Do not set the res, change the dpi! I do not use ubuntu, but most likely you will find the gdm.conf to be the file to increase dpi.

Thanks! I can?t find the way to change it on gdm.conf, but you opened me a new way to investigate, i knew about increasing dpi of the font, but not of de xorg, XD.

?Where to change it on xorg?

[droidhacker]

I do not use ubuntu, but on Fedora/Gnome, the option is in System --> Preference --> Appearance --> Fonts --> Details. Under fonts, you can also change the font sizes.

You generally should stick with your display's native resolution. The reason is that outside of the native resolution, things won't line up properly to pixel boundaries, so you'll end up with blurry lines and other general ugliness.