Re: [Server-devel] turn off backlight on XS-on-XO1
anna wrote: > I'd appreciate a command to blank the screen. I installed olpc-kbdshim from when you installed olpc-kbdshim i think you should have also gotten a new command to control the display: olpc-brightness, which takes "up", "down", "min", "max", or a number between 0 and 15 as an argument. it needs to run as root. > the repo and then > http://dev.laptop.org/~pgf/rpms/olpc-powerd-9-1.fc9.i386.rpm. Tried editing > /etc/powerd/powerd.conf to make the screen blank, but I guess I don't know > what I'm doing cause it's not working. i'm happy to help you figure this out if you can post more details of what you've done/tried, etc. settings something like this should work: config_PLUGGED_TIME_DIM="60" config_PLUGGED_TIME_BLANK="90" config_PLUGGED_TIME_SLEEP="9" config_BATTERY_TIME_DIM="60" config_BATTERY_TIME_BLANK="90" config_BATTERY_TIME_SLEEP="9" this makes things work identically when on battery or wall power, and tells the laptop not to go to sleep for about 30 years. after making the config changes, run "powerd-config =reconfig". (oh -- in your somewhat older version, you may need to do this manually, with "echo reconfig >/var/run/powerevents", or simply reboot.) > > In my particular situation, I usually just make sure the XS on XO is booted > up and online, then ssh in from another machine. So the ability to turn the > backlight off at will would be great. > > When I have a screen at all, that is. I've been messing around with "XS on > XO" on a couple of XOs that have been stripped for parts cause of one issue > or another. But that's another story. removing the backlight LED is certainly an effective way of reducing the brightness. :-) paul =- paul fox, p...@laptop.org ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] turn off backlight on XS-on-XO1
On Tue, Mar 02, 2010 at 09:12:41PM -0800, rihowa...@gmail.com wrote: > This is documented at http://wiki.laptop.org/go/DCON_Linux_Driver No, only the DCON specifics are documented. -- James Cameron http://quozl.linux.org.au/ ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] turn off backlight on XS-on-XO1
This is documented at http://wiki.laptop.org/go/DCON_Linux_Driver rihowa...@gmail.com On Mar 2, 2010, at 8:42 PM, James Cameron wrote: > On Tue, Mar 02, 2010 at 09:00:50PM -0600, Anna wrote: >> I'd appreciate a command to blank the screen. > > Your subject line mentions the backlight, and blanking the screen is > potentially a different task. > > I've tested an XO-1 with build 802b1. > > If you mean the backlight, you can manually control this from a shell > command or program like this: > > echo 0 > /sys/class/backlight/dcon-bl/brightness > > or > > echo 0 > /sys/devices/platform/dcon/backlight/dcon-bl/brightness > > Change the 0 to 15 for full brightness. With the backlight off, the > screen image should still be visible. > > You can manually turn off the screen and hide the screen image with this > shell command: > > echo 1 > /sys/devices/platform/dcon/sleep > > But it doesn't turn back on automatically. You can appear to lose > control this way; you can restore it to normal with this: > > echo 0 > /sys/devices/platform/dcon/sleep > > The text console does idle blank after a while, though without turning > off the backlight. > > It is possible to initiate screen blanking manually using code that > calls ioctl with TIOCLINUX and TIOCL_BLANKSCREEN but like the idle > console blanking it leaves square brackets on screen. The other three > modes of VESA blanking that the kernel can do (TIOCL_SETVESABLANK) don't > fare any better than the default. Two of the modes do the bit rot melt down > effect on the display. > > It is also possible to manipulate the blanking timers using escape > sequences sent to /dev/tty1 ... but again, we haven't integrated the > VESA blanking feature of the kernel with our DCON and backlight. > > -- > James Cameron > http://quozl.linux.org.au/ > ___ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] turn off backlight on XS-on-XO1
On Tue, Mar 02, 2010 at 09:00:50PM -0600, Anna wrote: > I'd appreciate a command to blank the screen. Your subject line mentions the backlight, and blanking the screen is potentially a different task. I've tested an XO-1 with build 802b1. If you mean the backlight, you can manually control this from a shell command or program like this: echo 0 > /sys/class/backlight/dcon-bl/brightness or echo 0 > /sys/devices/platform/dcon/backlight/dcon-bl/brightness Change the 0 to 15 for full brightness. With the backlight off, the screen image should still be visible. You can manually turn off the screen and hide the screen image with this shell command: echo 1 > /sys/devices/platform/dcon/sleep But it doesn't turn back on automatically. You can appear to lose control this way; you can restore it to normal with this: echo 0 > /sys/devices/platform/dcon/sleep The text console does idle blank after a while, though without turning off the backlight. It is possible to initiate screen blanking manually using code that calls ioctl with TIOCLINUX and TIOCL_BLANKSCREEN but like the idle console blanking it leaves square brackets on screen. The other three modes of VESA blanking that the kernel can do (TIOCL_SETVESABLANK) don't fare any better than the default. Two of the modes do the bit rot melt down effect on the display. It is also possible to manipulate the blanking timers using escape sequences sent to /dev/tty1 ... but again, we haven't integrated the VESA blanking feature of the kernel with our DCON and backlight. -- James Cameron http://quozl.linux.org.au/ ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] turn off backlight on XS-on-XO1
On Tue, Mar 2, 2010 at 1:34 PM, Paul Fox wrote: > martin wrote: > > Good question. Could we run Paul's power daemon configured to dim > > screen completely if there is no VT user actvity? > > yes, that would probably work. there's no X11 requirement in kbdshim > or powerd. but to be clear: is the requirement for blanking after > an idle period? or do you just want a command to blank the screen? > because the latter can be created pretty easily. > > paul > > I'd appreciate a command to blank the screen. I installed olpc-kbdshim from the repo and then http://dev.laptop.org/~pgf/rpms/olpc-powerd-9-1.fc9.i386.rpm. Tried editing /etc/powerd/powerd.conf to make the screen blank, but I guess I don't know what I'm doing cause it's not working. In my particular situation, I usually just make sure the XS on XO is booted up and online, then ssh in from another machine. So the ability to turn the backlight off at will would be great. When I have a screen at all, that is. I've been messing around with "XS on XO" on a couple of XOs that have been stripped for parts cause of one issue or another. But that's another story. Anna Schoolfield Birmingham ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] turn off backlight on XS-on-XO1
martin wrote: > On Tue, Mar 2, 2010 at 2:34 PM, Paul Fox wrote: > > yes, that would probably work. there's no X11 requirement in kbdshim > > or powerd. but to be clear: is the requirement for blanking after > > an idle period? or do you just want a command to blank the screen? > > because the latter can be created pretty easily. > > I want it on idle :-) i figured. :-) unfortunately kernel console blanking was never tied to the dcon -- i think it's one of several issues with bare console use on the XO. (the console has never been a priority.) you can install olpc-kbdshim and olpc-powerd, and adjust the powerd config to never dim and/or blank the display without ever suspending. the fedora F9 packages should work for this. paul =- paul fox, p...@laptop.org ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
Re: [Server-devel] turn off backlight on XS-on-XO1
Good question. Could we run Paul's power daemon configured to dim screen completely if there is no VT user actvity? cc' ing Paul and devel - m On Tue, Mar 2, 2010 at 2:26 AM, Sameer Verma wrote: > Is there any way to turn off the backlight on a XS-on-XO1? Keyboard > control doesn't do it. > > Sameer > -- > Dr. Sameer Verma, Ph.D. > Associate Professor, Information Systems > Director, Campus Business Solutions > San Francisco State University > http://verma.sfsu.edu/ > http://cbs.sfsu.edu/ > http://is.sfsu.edu/ > ___ > Server-devel mailing list > Server-devel@lists.laptop.org > http://lists.laptop.org/listinfo/server-devel > -- martin.langh...@gmail.com mar...@laptop.org -- School Server Architect - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
[Server-devel] turn off backlight on XS-on-XO1
Is there any way to turn off the backlight on a XS-on-XO1? Keyboard control doesn't do it. Sameer -- Dr. Sameer Verma, Ph.D. Associate Professor, Information Systems Director, Campus Business Solutions San Francisco State University http://verma.sfsu.edu/ http://cbs.sfsu.edu/ http://is.sfsu.edu/ ___ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel
