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10

How about x windows? Can you set up xinerama for 6 screens? Or make it able to drag x windows? The current Xorg limit is 16 display devices, but a multi-head card will typically be treated as a single device unless you want separate logical displays (not Xinerama-style).


8

This seems to be a known bug and you can read more detail on launchpad as well as on ubuntuforums. The issue is that somehow gnome-power-manager and the xset commands conflict with each other. The solution is to run xset dpms force off in a loop, a python script pretty much works for most of us. Give it a try, and see how it goes.


8

Your laptop should have /sys/class/backlight. For example, /sys/class/backlight/acpi_video0/brightness. You can write (echo) values to this file to adjust brightness. cat /sys/class/backlight/acpi_video0/max_brightness > /sys/class/backlight/acpi_video0/brightness This will set the brightness to max. Just put it in an init script on boot.


7

Okay, so, the answer is that the redshift program, pointed out by St├ęphane Gimenez in a comment above, can do this pretty simply. It's meant to do a clever adjust-white-point-over-the-day thing, but it can also be made to do one-time adjustments with the -o flag. The desired color temperature in Kelvin must be given twice because of the time-based features, ...


7

This was tested on a laptop with a i915 drived graphic card. Definitively, in my config/install, there are not. :-( When a new screen is plugged, no event is sent to the host! (This stay true after my last edit!) So the only way is to use pooling... Trying to make them lighter as possible... Last Edit : Finaly there is one better solution (through ...


7

xset dpms force off works for most X setups.


5

Try: find /proc /sys | grep -ie brightness -e light -e lux -e lumin On this laptop (a MacBookPro), it reveals (among other things): /sys/devices/platform/applesmc.768/light which is neither over PCI or USB. You could try the same after sudo modprobe -a tsl2550 isl29003 isl29020 apds9802als apds990x bh1770glc bh1780gli which are drivers for various ...


5

You can use vbetool to turn the display on/off from the console. off: $ sudo vbetool dpms off on: $ sudo vbetool dpms on This command construct will turn it off, and then if you hit a key turn it back on: $ sudo sh -c 'vbetool dpms off; read ans; vbetool dpms on' References [SOLVED] How to turn off monitor at CLI Turn off monitor using command ...


4

X11 can adjust gamma with the command xgamma, which should come standard with X11 on most Linux distros. This works independent of what monitor you use. The proprietary drivers for some graphics cards offer GUI gamma adjustments.


4

There is hardware calibration available for Linux, if you can find the hardware to do so. The Sp*der 1 and 2 are allegedly supported. The Sp*der 3 maybe. Here is an article on using the Pantone Huey (another inexpensive device that is actually supported on Linux). The X-Rite Eye-One Display is also supposedly supported, but can find no instructive ...


4

Your desktop environment probably has a way, but you don't say which one you're using (if any). If your display driver is compatible with the XRandR extension, which is the standard X.org method for managing display resolutions and arrangements, you can use the command-line utility xrandr. I think the proprietary NVidia driver bypasses XRandR, so if you're ...


4

I'm not sure you are going to get the results you want from a test program. I've worked at a company that produced consumer electronics and the test facility there had several environmental units that would simulate scenarios like this that would cause failures. One was just a simple box with a heating element that would allow you to put electronics in it ...


4

I have used arandr, this utility allows to save a script configuring your two screens. (I know there is also the utilityxrandr but I have not used it.) I have added this script to my startup in fluxbox (I don't know where to put it for openbox) so each time a session is started, my two monitors get configured. I don't understand what you mean with desktop ...


4

You found the command yourself, you just need to parse it For example: $ xrandr -q | grep -Po 'current\s*\d+\s*x\s*\d+' | awk '{print $1/$3}' The regular expression looks for current, then 0 or more white space characters (\s*), then one or more digits (\d+) followed by \s*, then x, then \s* and finally more digits. The \K simply discards anything that ...


3

You should be able to adjust the gamma using the xgamma command.


3

The problem is not RandR, your video driver is not configuring the monitor based on the EDID information from the Monitor. Check the Xorg?.log file to see how the driver is configuring the monitor. It is possible to configure the monitor in the xorg.conf configuration. I haven't tried this for a plug and play setup. Configuring a dual monitor setup ...


3

I ended up making a few scripts to solve my problem. I bound the following three scripts to convenient keys (CTRL+ALT+PGUP for brightness up, CTRL+ALT+PGDN for brigthtness down and CTRL+ALT+HOME for restoring brigtness to a default value). The scripts require sudoless setpci (you can probably play with some chmods after looking at errors you get by ...


3

Had this problem on AMD/HP laptop. Also running 10.04.3/32, same problem. Got this solution from another forum: #!/bin/sh perl -e 'select(undef,undef,undef,.1)' && xset dpms force off I put that in a sh file, set it executable, and linked that to the panel shortcut. Worked like a charm, monitor stays off. I've got no idea what the hell that ...


3

I managed to get Debian 6 working with 3x gfx cards and 6 screens. However, no 3D support with xinerama. My xorg.conf # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 295.59 (buildmeister@swio-display-x86-rhel47-03.nvidia.com) Wed Jun 6 22:23:02 PDT 2012 Section "ServerLayout" Identifier ...


3

There is a tool called read-edid doing exactly what its name suggests.


3

my x120e's brightness constantly changing bothers me as well. surprisingly (but not), when i ran gksudo dmesg > boot.messages and opened boot.messages in a text editor, i noticed this message: [Firmware Bug]: ACPI: No _BQC method, cannot determine initial brightness multiple times, as well as some interesting others. paste that into Google and ...


3

I don't think that's possible, as the driver(s) used for the virtual consoles are not that flexible. Once the *fb kernel driver is loaded its settings cannot be changed and once the fbcon module is loaded the *fb wouldn't unload (for me). However, you just want to enable/disable a monitor and not a full equivalent to xrandr on the console, I think. There is ...


3

Edit: I've found an actual solution that doesn't require you to install CrunchBang instead of Debian! I was using Debian Squeeze, that used a kernel version that, apparently, did not support my graphics card. The solution is simply upgrading to Debian testing (Wheezy). Change your etc/apt/sources.list to: deb http://ftp.hr.debian.org/debian testing main ...


3

You can do so by modifying the Xorg.conf by adding the line Section "Monitor" Identifier "Monitor1" Option "Rotate" "left" EndSection or after login use the xrandr command as: xrandr --output DVI-2 --rotate left Replace DVI-2 and left as per your requirement xrandr solution will be effective till session exist. On reboot, ...


2

You might want to check out the following bugs for possible explanations: https://bugzilla.redhat.com/show_bug.cgi?id=608900 https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/35223 https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/464577 It seems that your problem is likely being caused either by gdm or by a bug in ...


2

I think there is no daemon for that. You could however write a script to periodically parse xorg.log or you may be able to use xrandr, but I am not at my Linux box right now, so I can't tell exactly.


2

Try xrandr --verbose. It shows the RAW edid information and lots of other useful information for all monitors connected to your computer. Example output, with only the EDID section: $ xrandr --verbose (cut) EDID: 00ffffffffffff0030ae364000000000 00130103801e1378eaef259458568a29 24505400000001010101010101010101 ...


2

If xcalib/xgamma do not apply settings to all or a specific monitor in a multiple monitor setup configured dynamically via xrandr, then brightness and gamma per-output can be controlled via xrandr: xrandr --output DVI-0 --brightness 0.8 --gamma 1:1:1


2

Using xcalib: $ xcalib --contrast [percentage] -- alter


2

You can use xdotool, which is a command line tool for manipulating X windows, so it should work with every window manager and every desktop environment.



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