https://bugzilla.novell.com/show_bug.cgi?id=387574
User sndirsch@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=387574#c5
--- Comment #5 from Stefan Dirsch 2008-05-07 02:28:51 MST ---
You should definitely get 1024x768 on your Laptop panel.
(II) RADEON(0): Validating modes on Primary head ---------
(II) RADEON(0): Existing panel PLL dividers will be used.
(WW) RADEON(0): Panel size 1024x768 is derived, this may not be correct.
If not, use PanelSize option to overwrite this setting
(II) RADEON(0): Panel infos found from DDC detailed: 1024x768
(II) RADEON(0): Valid Mode from Detailed timing table: 1024x768
(II) RADEON(0): Total of 1 mode(s) found.
(II) RADEON(0): Total number of valid DDC mode(s) found: 1
(II) RADEON(0): Valid mode using on-chip RMX: 1024x768
(II) RADEON(0): Total number of valid FP mode(s) found: 1
[...]
(II) RADEON(0): Modes for CRT1: ********************
(--) RADEON(0): Virtual size is 1024x768 (pitch 1024)
(**) RADEON(0): *Mode "1024x768": 65.0 MHz (scaled from 0.0 MHz), 48.4 kHz,
60.0 Hz
(II) RADEON(0): Modeline "1024x768"x0.0 65.00 1024 1048 1184 1344 768 771
777 806 (48.4 kHz)
For the external output you indeed get only 640x480:
(II) RADEON(0): Validating CRTC2 modes for MergedFB ------------
(II) RADEON(0): CRT2 Monitor: Using hsync range of 28.00-33.00 kHz
(II) RADEON(0): CRT2 Monitor: Using vrefresh range of 43.00-72.00 Hz
(II) RADEON(0): Clock range: 12.50 to 350.00 MHz
(II) RADEON(0): Not using mode "1024x768" (hsync out of range)
(II) RADEON(0): Not using mode "1024x768" (hsync out of range)
[...]
(II) RADEON(0): Modes for CRT2: ********************
(--) RADEON(0): Virtual size is 640x480 (pitch 640)
(**) RADEON(0): Default mode "640x480": 25.2 MHz, 31.5 kHz, 59.9 Hz
(II) RADEON(0): Modeline "640x480"x59.9 25.18 640 656 752 800 480 490 492
525 -hsync -vsync (31.5 kHz)
This following seems to be the problem.
(II) RADEON(0): Generating MergedFB mode list
(II) RADEON(0): Clone mode, list all common modes
(II) RADEON(0): Merged "640x480" (640x480) and "640x480" (640x480) to 640x480
(Clone)
(--) RADEON(0): MergedFB: Virtual width 640
(--) RADEON(0): MergedFB: Virtual height 480
(**) RADEON(0): MergedFB: Display dimensions: 285x214 mm
(**) RADEON(0): MergedFB: DPI set to (57, 56)
I should definitely disable MergedFB by default. Can you verify that this will
help by adding 'Option "MergedFB" "false"' to your xorg.conf (Section
"Device")?
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