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gw
Apprentice
Joined: 03 Dec 2006
Posts: 215
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 Posted: Tue Jun 30, 2009 7:54 am Post subject: SOLVED: Can I have a rotated framebuffer console? |
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Hi,
I'm using my monitor in portrait orientation which, under X, is done with:
Yet everytime on booting and rebooting I have to physically turn the monitor, because the display falls back to normal (landscape) after leaving the X environment. That is really annoying!
Is it possible to tell the framebuffer console to work in a rotated-to-portrait mode?
Thanks for your help
gw
Last edited by gw on Tue Jun 30, 2009 10:56 am; edited 1 time in total |
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szczerb
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Joined: 24 Feb 2007
Posts: 1709
Location: Poland => Lodz
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| Posted: Tue Jun 30, 2009 8:14 am Post subject: |
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| In menuconfig there is an option for support of rotating the fb, but I have no idea what userspace programs you'd need. |
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gw
Apprentice
Joined: 03 Dec 2006
Posts: 215
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| Posted: Tue Jun 30, 2009 10:55 am Post subject: |
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| szczerb wrote: | | In menuconfig there is an option for support of rotating the fb, but I have no idea what userspace programs you'd need. |
Yes, I had this already: | Code: | root@linux:~> zcat /proc/config.gz|grep -i framebuffer
CONFIG_FRAMEBUFFER_CONSOLE=y
# CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY is not set
CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y |
But I had no idea how to activate it. The answer is simple, checkout linux kernel documentation fbcon.txt!
| Quote: | C. Boot options
The framebuffer console has several, largely unknown, boot options
that can change its behavior. [...]
4. fbcon=rotate:<n>
This option changes the orientation angle of the console display. The
value 'n' accepts the following:
0 - normal orientation (0 degree)
1 - clockwise orientation (90 degrees)
2 - upside down orientation (180 degrees)
3 - counterclockwise orientation (270 degrees)
The angle can be changed anytime afterwards by 'echoing' the same
numbers to any one of the 2 attributes found in
/sys/class/graphics/fbcon
rotate - rotate the display of the active console
rotate_all - rotate the display of all consoles
Console rotation will only become available if Console Rotation
Support is compiled in your kernel.
NOTE: This is purely console rotation. Any other applications that
use the framebuffer will remain at their 'normal'orientation.
Actually, the underlying fb driver is totally ignorant of console
rotation.
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So in grub.conf I add a fbcon declaration: | Code: | | kernel /boot/kernel-2.6.29-gentoo-r5 root=/dev/sda5 console=tty1 video=uvesafb:mtrr:3,ywrap,1280x1024-32@60 fbcon=rotate:3,scrollback=2048k |
And it works!
thanks
gw |
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