Ubuntu :: Software Method To Reduce Screen Brightness?
Aug 10, 2010
I have a netbook with LED backlight, but even the lowest brightness of the screen is still very bright and eye straining in a dark environment. On Windows and MacOSX there are simple tools that put a borderless more or less transparent black window in front of everything on the screen to reduce brightness even further.Are there such tools for Ubuntu or other means of achieving the same result?
Ubuntu 10.04.1 Nvidia gpu ( Asus GeForce GTS 450 Series graphic card) DVI connection to monitor (Dell 2405)
Using a VGA connection I can use the buttons on the monitor to control both contrast and brightness. Using dvi there is no control(no contrast control and the brightness button changes the numbers but not the actual brightness!) I cannot find the app that controls the Nvidia GPU (it should exist as I found it on Zenwalk).
I'd been trying to get into Linux before I bought it so I figured that I would try to get it onto my new Mac so that I could use it wherever I am. I decided to try Debian Lenny 5.0.3 a whirl after reading about all the different distros available. I've successfully installed it and I can get to it with rEFIt, and I have quite a few things working such as the video drivers and wifi. However, I've had trouble getting it to a level where it'd be usable away from home. Here are the main problems I'm worried about:
1) I installed pommed but I still can't use the brightness keys to change the screen brightness. I'm not sure if there's some other workaround for this?
2) I tried some recommended power management packages (gnome-power-manager) but it doesn't seem to be accessible or functional right now. I don't have any way to control it or get to it that is obvious to me. Is an icon or anything supposed to appear on the task bar when you install or what? Getting some sort of power management on here is important because it gets really lousy battery life otherwise.
3) Being a Macbook, there's no right-click button. Multitouch would be really nice (two-finger scrolling!) but I'd be OK with ANY way to right-click with the touchpad. I have a wireless USB keyboard/mouse combo that works at home at least . . . right out of the box too!
4) I've seen some packages called the Mactel PPA, but they are made for Ubuntu. Since Debian and Ubuntu are so similar, is there any way to make those work on Lenny? I think that if I got those to work, I could fix some of the problems above. Or do I have to install Ubuntu?
5) I just noticed that the sound doesn't seem to work yet either.
I have a rack of four 1TB drives all partitioned identically with three primary partitions. On each drive
- the first partition is only 64MB; - the second is a large 900GB partition and - the last holds all the remaining space
mdadm has been used to set up /dev/md0 - RAID1, comprised of /dev/sda1 and /dev/sdb1 /dev/md1 - RAID5, comprised of /dev/sda2, /dev/sdb2, /dev/sdc2, /dev/sdd2 /dev/md2 - RAID5, comprised of /dev/sda3, /dev/sdb3, /dev/sdc3, /dev/sdd3
OK, so it was a silly mistake to make - but I am now need to increase the size of /dev/md0. My thinking is to reduce the size of md1 so that I can grow md0.
On md1 I have two logical volumes. I've successfully reduced the size of the volume so that I can reduce the size of md1. Now I'm at the nervous stage; I can find little written on the topic of shrinking RAID5 arrays - and even if I do this I'm unsure if I can move partitions around to regain the space I so desire.
I am not sure if this is really a Ubuntu question but lets try it!Received email shows a long header which includes lines of code. I can scroll through it but I can't reduce the number of lines on screen.This significantly reduces the number of lines available for the message. There must be a way to reduce or eliminate this header.
Can the size of the Ubuntu desktop window be reduced so that it displays on a monitor or via a data projector with a surrounding black border? If so, how? The tragicomic chain of events which leads to the question is as follows. Community group, short of cash, want to equip lecture room. Pull-down screen is set up permanently on one wall. Contractor sets up old data projector via ceiling mount. Data projector is just too far away from wall, such that image cannot be reduced sufficiently by the data projector to fit on the screen.
Annoyingly the image, as displayed, is only slightly too large - just enough to lose the top and bottom panels, Applications menu, File Menu on full-size windows, Indicator applet, Trash, and restore desktop button. The data projector is hooked up via VGA cable to a recycled PC running Ubuntu 10.04 with proprietary NVidia driver (version 173) for GeForce 8400 GS. I'll give anything to be able to do this on the PC, rather than having to move the projector!
I keep hearing about how Ubuntu is supposed to be so much faster than Windows 7, but have yet to see any major difference in their boot times. I am dual-booting Windows 7 and Ubuntu 10.04 on an intel Centrino 2 processor with 4Gb of ram and both OS's take about the same time to boot. After I get to the bootmanager to select OS, if I click on Windows 7 it almost immediately goes to the GUI load screen with the windows logo. On the other hand, if I boot into Ubuntu I get a black screen for ~30 seconds before the Ubuntu logo even appears. Comparing GUI boot times, Ubuntu is clearly the winner, but they take the same time total.
Does anyone know what is making the long black screen or how to reduce the time? I would really like to show people how fast Ubuntu really boots.Immediatly before Ubuntu Gui starts, an message shows up for a second saying something like "Unknown adaptor version (2): You may experience some problems", it flies past so quickly that may not be verbatim.
My computer (Samsung R580 N330M)seems doesnot adjust brightness both power manager and configuration file in /proc, I tried NVIDIA setting and it works,but I think it changes the color,not LCD. is it caused by driver problems?
My laptop with Ubuntu 9.10 just randomly while adjusting the brightness using the shortcut key commands on my laptop the brightness started to glitch between two brightness levels. If I don't use the shortcut keys it doesn't glitch unless I shut the screen or restart the computer. So I've had to put up with this for the past couple months now and I think that it might even drive me to reinstall but then I lose all my data.
Sometimes, out of the blue, my screen will suddenly change brightness. And no, not the gnome power manager dimming the screen when idle, I'm talking about it suddenly going from dimmest to brightest when I haven't even touched the screen brightness buttons in the last few minutes.
what package would I file this bug against)? This is Maverick on a thinkpad T60, and I can provide any other information that people find relevant. On what may be a related note, it seems that one push of the screen brightness up or down buttons causes two increments in brightness.
I originally installed Maverick on my Macbook 5.1 using rEFIt to dual boot. For some reason, after installing Compiz my screen brightness functionality stopped working. It was permanently 100%. I thought that upgrading to Natty might work, but no luck. So far I've tried changing the brightness manually in terminal and in power-management, editing the grub file and also reinstalling compiz, all to no avail. Trying to alter brightness using the fn keys displays the brightness panel in the top right, and it decreases in value as it should, but the screen stays bright. The brightness settings work fine when I boot to Mac.
on my fairly new ubuntu install (10.04.1 LTS) on a laptop, the screen brightness changes seemingly at random, i.e. while I do other things like surf the web. Often, the brightness will decrease some (it does not fade to black as reported by others with similar problems) and come back a few seconds later
if there is a way of selecting a specific area of the screen and increase brightness? The thing is that I had to reduce my monitor brightness and contrast, due to recurring headaches. The new configuration is fine for most applications, but videos on web pages are too dark. I have created a script that allows me to change nvidia settings quickly, but when switching to the brighter setup my eyes hurt even if it is just for a moment. So I would like to be able to brighten a specific area of the screen.
I bought a Asus eeepc a few days ago which I really like, with the exception of one thing - windows 7 starter. I like Windows 7, but starter is just bad. I also really like ubuntu, so I've decided to put it on my netbook. I download the netbook edition from the site, put it on a usb drive, and than tested it out - well, my screen is dim, very dim. Changing the brightness setting on the tool bar up top doesn't change anything, and using the function keys does change it, but still keeps it very dim.
I've tried restarting my computer, same thing, I've tried messing around with settings in the battery options, nothing... I really don't want to install it if its going to be this dark, I can see things, but its not very pleasant to use. I'm starting to consider that its the problem with the file I downloaded. Theres nothing wrong with my netbook, everything worked perfectly fine in Windows 7. I use the full version of ubuntu 10.04 on my other laptop which works perfectly fine, I'm not sure why this version is acting so weird on my netbook.
I'm having trouble locating a way to adjust the screen brightness on fc10... It is only possible to use the monitor's control for now.Yeah my monitor make an annoying whining noise unless you turn it on 100% brightness, but that hurts my eyes.It is so crazy that they didn't put a brightness control in! ( or rather they destroyed working ones of year past, Why? )
My issue is like this: I have a laptop (dell vostro 1400, NVidia 8400M video card) running Fedora 12 up to date. My desktop is KDE 4. I usually run the laptop connected to the power outlet, so my power profile is set to "performance". This power profile sets the screen brightness to the maximum. However, when I'm in the dark, I want to lower the screen brightness. The shortcut keys work, and the screen brightness is lowered. However, for some reason, after about 30 seconds it resets itself to the highest brightness setting. No matter how I set the brightness, it will always reset itself. Any ideas what can i do to correct this?
Running F14 on Dell Studio 14 with LCD screen and US keyboard selected. After initial power on the keyboard selection of "Windows Key" + F4 will dim the screen and the "Windows Key" + F5 will brighten the screen. When being used, either combination will also show a meter on the screen to display the adjustment of the brightness. When the lid is closed the computer is set to suspend by default. After the computer is brought back from suspend the keyboard short cuts no longer control the brightness and the meter does not appear on the screen. I have not found any other way to control the brightness and I have to restart to get the keyboard short cuts to work again.
After installing Fedora 14, I can't seem to make my screen brightness go above the absolute minimum. I've tried editing /proc/acpi/video/VGA/LCD/brightness to change the current setting from 20 to 100, but I can't save it, even when logged in as su, it returns "Invalid Argument" when I try to enter the filename of where to save. What do I do?
so i have f12 installed on my hd with lvm using the whole extent of the HD , i want to reduce it so i can dual boot it with a windows system, i managed to reduce the logical volume to free some space, but i cant seem to reduce the physical volume, is this possible and how ?
I have just upgraded to xubuntu 10.04 and although some function keys are working (like volume control), the screen brightness function keys aren't (the screen brightness is at top level and can't be reduced)Notes:I am using a Compaq 610 laptopThe brightness keys are working on Ubuntu 10.04 (live session)How can I fix this?, and at least is there any other way to adjust screen brightness?
I could find on the net to fix the screen brightness keys and get them working so I could increase the screen brightness. Nothing worked.For most or many people, some of the suggestions will work fine. For those of you who can't get them to work and are stuck with Ubuntu 10.04 on the NC20 with a dimmed-out screen, I have a quick workaround:
When you boot and get to the BIOS password prompt, use the function and up-down array keys to control the brightness there. The screen brightness will be carried through to Ubuntu. You might be able to do this at the GRUB prompt. The point is that the BIOS handles the screen brightness before Ubuntu, so it just works.
I recently switched my os to Ubuntu 10.04 Lucid Netbook Edition. After installing, I noticed that I am unable to adjust the brightness of my screen. The Fn keys do not work and I cannot find any other way to adjust it.The only way I have been able to adjust it is at the BIOS with Fn keys.
I ran Kubuntu 10.4 from the Live CD and from the start The screen was automatically set to be as dim as possible, but in the power manager the brightness is set to be as bright as possible. Moving around the slider doesn't do nothing, and when I click the battery icon in the tray, it shows another brightness slider that's set to dim as possible, when I move it around it has no effect and just goes back to where it was when I close the popup window. Right now I'm running from the livedisk on an IBM T42 thinkpad laptop.How do I fix this, is it a hardware issue, I've had problems with my graphics card in the past with compositing in X/Ubuntu.I've found some text files for the backlight, they're all set to 0 which I believe is the problem, however even though I'm running the File Manager as root with kdesudo and the permissions are set to read and write for the owner, who is root, I can't save any changes.
Every once in a while my laptop screen gets stuck on the lowest brightness setting. I go to the brightness setting, and it tells me it is on the highest setting. When I reset my settings, nothing happens. And I notice this usually happens after I have put the laptop in suspend mode.
When I first install debian I couldn't change the screen brightness at all not manually nor with function keys, but I tried some of the solutions I found on the internet and now I can change the brightness manually (from the power management or the battery icon) but when I use the function keys it takes them like 2 to 3 minutes to respond and cause the system to hang (even mouse curser not responding) and then I'm forced to manually reboot the system, here is some information :
Code: Select all$ ls /sys/class/backlight/ acpi_video0 intel_backlight
Code: Select all$cat /etc/default/grub # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration'