Debian :: Laptop Brightness Gets Set To Maximum On Boot
Jun 10, 2010
My laptop brightness gets set to maximium each boot.
Just wondering if this is the case for other laptop users. I have a Lenovo Thinkpad SL500 (GeForce 9300M GS) and am running Testing.
Ideally I'd like it to remember my last setting (which is usually the lowest). It'd be nice not having to turn it down each time I reboot/power-on.
It actually starts off at a low setting but during the boot process (before gdm and just after the "Waiting for /dev" line I believe) it suddenly gets set to max.
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May 7, 2015
I have an issue with Debian 7.8 (wheezy) on my laptop. I've had to reinstall Debian on my laptop and since then I've had issues getting brightness controls to work properly.
It's a Core i3 370M processor with Ironlake graphics, I've had this issue before with Ubuntu and I sought [URL] ..... I've tried the steps that worked for Ubuntu (thinking they'd be the same as they're both Debian based) and it hasn't worked.
What should I try to get it to work? Since I have updated my grub config (as per the Ubuntu fix), brightness doesn't work at all and my screen now tiles ever so slightly when moving the cursor from side to side. I'll revert those changes if need be or if this issue cannot be resolved.
I've tried to install the Intel graphics drivers from 01.org, however I get an issue with libglib dependencies not being satisfied ( libglib2.0-0(>=2.37.3) ) that how to resolve.
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May 5, 2011
I recently switched from Ubuntu to Fedora and had this screen brightness issue with my HP Pavilion dv3 notebook. The brightness is so blinding and I cannot adjust it.Fn keys works and responds but the screen stays the same.
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Feb 17, 2010
I have installed kmilo, modprobed nvram and added line: KERNEL=="nvram", MODE="0666", GROUP="nvram" to 91-permissions.rules. I used command addgroup nvram and add me ( user tomasso ) to nvram group. Kmilo works fine but I am not able to change brightness of my laptop in kpowersave or by using fn key on my laptop keyboard. I am in powerdev group too.
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May 6, 2015
how to make brightness key work ?
BOSSLINUX 5.0 derived from debian
contents of etc/brlapi.key :
==============
b356dfb09008831d4630ad46aa743ebe
contents of etc/acpi/sonybright.sh
====================
#!/bin/bash
# TODO: Change above to /bin/sh
[Code].....
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Jul 15, 2015
Today I installed debian-8.1.0-amd64 on my older Samsung Laptop (Model r560). The installation without a desktop environment worked fine and the system booted without any problems into the virtual console. There was however one problem: when I was away from keyboard for some time, the screen turned black and when I came back and hit a button to wake the system up, the laptop immediately restarted. Later I installed the gnome desktop environment. This also worked fine.
But whenever I try to change the screen brightness in the gnome-shell, my system immediately restarts and successive attempts to boot debian fail. Some time later and after countless attempts to boot debian, it finally does boot again. By "debian fails to boot" i mean the following: The initial ram disk is loaded and fschk runs. Usually the system suddenly reboots at this point. SOmetimes, however, the video mode changes, the console font is changed and some services are getting started, but then at some point the system also restarts. I don't reach the point where a login prompt appears, or the graphical environment starts up.
Assuming, it has something to do with buggy acpi implementation of my hardware, I tried the following:
I tried to disable acpi completely by using the kernel parameter "acpi=off". This doesn't work and causes the kernel to hang
I tried to start debian without using a GUI using the single parameter. This also didn't work.
acpi_backlight=vendor also did not fix the problem.
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Aug 1, 2014
I have both cpufrequtils and acpi-whatevercpu, normally processor would be correctly controlled by the ondemand governor and have two steps for frequency, 1.4 and 3.5GHz. Now I've noticed my frequency is always at 3.5GHz, cpufreq-info gives me the hint:
Code: Select allguiu@guiu-desktop:~$ cpufreq-info --cpu 0
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org.
[Code].....
This isn't really a big issue. Normally the processor will sit at +-28°C at low load levels at maximum frequency, with the proper governor it will drop to +-20°C (room temperature) and lower. So I still would like to get proper management of frequencies for more hardware life, and better energy efficiency, not to mention quieter fans. Documentations on cpufrequtils is very broad, and apart from that I don't know where to look for this. Debian wiki page mentions about a file that can be used to configure this but there isn't much documentation.
Ps: I previously had this issue where acpi-cpufreq driver wouldn't load at all, this is due to setting on bios resulting in different frequencies than stock, trying to get default frequencies allowed the driver to work.
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Feb 9, 2010
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.
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Mar 3, 2010
I Install Ubuntu 9.10 and I can't control Brightness, show brightness popup (Fn+F5F6) but screen brightness don't work, I install NVIDIA Driver Linux-x86_64 version 190.53, modiffed xorg.conf.
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Jul 25, 2011
I have installed Xubuntu 11.04 on a HP Probook 4510S and the FN Keys of brightness only works when I on the login screen (gdm). Until I enter to my desktop the FN Keys stop Working. This is a XFCE Issue? I have another Laptop, a IBM THinkpad X40, with the same Xubuntu 11.04 and the FN Keys works perfect! Even the keyboard light Works! I think this is a ACPI related problem, I google it the problem with out a specific issue like this. The only thing that I can do it is use of xbacklight when I'm on my session.
root@xavierc-lt-xub:~# ls /proc/acpi/
ac_adapter battery button event wakeup
root@xavierc-lt-xub:~#
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Apr 24, 2011
I have acer Aspire 5742 with mint 9 {64/32 bit both} installed.. I cannot adjust brightness of my laptop in any of them.. The shortcut keys are working fine as increasing or decreasing through keys show icon increasing or decreasing brightness but it is not affecting brightness in anyway.
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Jul 4, 2010
i have an alienware M11X and i have installed fedora. I have a problem with brightness. When i press hotkey for increase or decrease brightness i see the bar increase and decrease on my screen but brigthness don't change and stay maximal. I have tested a live cd ubuntu and it's work.
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Feb 23, 2010
I got a new Sony F series laptop and struggled thru getting the video card to work, the wireless card to work, and the volume to work on 9.10. The brightness controls have stumped me though. The screen is on full bright and the brightness controls (FN+F5 & FN+F6) make the applet display change but the actual screen brightness does not change. I have also tried the brightness applet in the panel and that also has no effect on actual screen brightness.
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Mar 21, 2010
I am having problems with the brightness control on my sony vaio laptop, at virst when i upgraded the driver for the VGA card the whole screen went blank, I had to port a bin file from windows and write my own EDID file to get it to work (nVidia GT 230M), but I am having problems with the brightness, although ubuntu does read the input from the keys (FN+...), the brightness refuses to change, adding the brightness applet to the taskbar does not work either. I really need to be able to change my brightness because the battery usage is off the charts.
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May 5, 2010
I have an Asus P50IJ-X2 and in lucid the backlight cannot be adjusted. The panel app doesnt work, when I click on it and try to adjust the slider it just disappears. When I reopen it the slider is at the top left corner of the screen.
The function keys seem to be detected alright, but when I press them I get the notification that the brightness is going down but nothing happens. Also after the first press the notification gets extremely laggy. If I press the brightness keys again it takes 30 seconds or more for the notification to show up. Also after the first press my volume function keys have the same behaviour in the notification area as the function keys.
Also messing with the controls in the power settings doesn't do anything. The strange thing is all of this worked perfectly in Karmic. The function keys, auto dimming, everything just worked out of the box. I have no idea where to start trouble shooting this so can anyone give me some direction?
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Apr 23, 2011
I want to know how can I increase the brightness of my LCD screen. I have a toshiba sattelite A500-1f4 laptop with nvidia geforce gt 330m video card. I work on centos 5.6 x86-64 system.
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Apr 4, 2011
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.
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Apr 25, 2010
I have installed Fedora12 on Dell Inspiron laptop. Here are my key details of my laptop.
<Fn + F4 > ---- For decreasing Brightness
<Fn + F5 > ---- For increasing Brightness
<Fn + F2 > ---- To enable Bluetooth
I am able to enable bluetooth by pressing <Fn + F2>, But I am not able to increase OR decrease brightness of my laptop screen.I have attached keymap of my laptop by the output of
Code:
xmodmap -pke
Please find the attachment keymap.txt.
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Mar 15, 2010
I'm currently trying to setup a minimal Slackware installation. Everything is well, except for screen brightness/hard disk control via laptop-mode-tools. I was wondering if anyone used it, and if they got it to work on their Slack systems, how they went about doing it.
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Mar 22, 2011
I'm having a really strange problem, when I turn on openSUSE, the brightness is fine.owever, as soon as I log in the brightness gets obnoxiously low. I have a MacBook Pro 7.1 with openSUSE 11.4 KDE
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Apr 13, 2011
I have a laptop with important data (no backup) that will not boot. It's a vanilla Debian 6 amd64 with dm-crypt LUKs encryption to a internal sata drive partitioned sda1 sda2 sda5 with lvm2 formatted ext3 for sda5. The symptom is that upon powering up, it progresses (albeit slowly now) past grub, to the point where the the "Enter passphrase" prompt occurs. After entering the phrase, it pauses with "Reading all physical volumes. This may take a while". It seems to work, but then gives me errors like:
ata3.00: status: {DRDY ERR }
ata3.00: error: { UNC }
ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
ata3.00: BMDMA stat 0x25
ata3.00: failed command READ DMA EXT
...some more stuff...
end_request: I/O error:, dev sda, sector 308725410
JBD: Failed to read block at offset 24711
EXT3-fs: error loading journal
and it drops me to Busybox ash shell. My impression is that the sda1 partition with the kernel is intact, but the sda2 or sda5 is bad.
What else I have done:
1. Removed problem disk and installed it into another known good laptop. Issue occurs with new laptop. So, I would assume hd is bad, laptop is good.
2. Booted from hd using grub rescue mode. Similar errors occurred.
3. Using suspect laptop and hd, booted into a live cd environment, which attempted to mount the encrypted drive. It prompted for the passphrase, but said it could not mount the drive.
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Aug 13, 2015
I burned a live dvdrw with the hybrid live cd of debian 8.1 gnome and installed Debian onto the 32gb usb stick like this
8gb for /
22 for /home
2gb for swap
after chrooting into the usb stick with the live dvd-rw and installing grub2 there again cause the installation couldn't do it without chrooting first.. I wasn't able to boot from the laptop I installed Debian with but I could on my Desktop PC.
I wondered if you needed a copy of my grub.conf? so here is the pastebinnet of /boot/grub/grug.conf
[URL] ...
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Aug 27, 2010
I'm trying to install debian on my HP laptop but get the following problem...
After the live CD boot screen shows up i go to XFCE > install
it loads vmlinuz and init.gz and after that the screen goes blank
i tried graphical install, advanced install, advanced graphical install but those too didn't work
also i tried all of these from LXDE menu
but the same problem
My laptop is HP pavillion dv6
its got an ATI radeon graphics card (hope there's no problem with the display)
4GB ram
intel core i7
However the cd works fine with my old desktop computer
which has no graphics card
256MB ram
intel P4 CPU
Do i need to set some boot parameters?
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May 31, 2011
First off all, I'm booting from a large MEMDISK using PXE (900MB) . Due to our environment, I cannot decrease the size, nor move files to a nfs/iSCSI/... environment. Everything needs to be in that MEMDISK.
Now, when I try to run the OS, I get out of vmalloc space. How do I increase it to a number which allows such a large image to be mapped? I tried the parameter "vmalloc=1280M", but with that parameter, I don't get past the Booting the kernel screen.
Memory should not be an issue, since the machine(s) have at least 2GB RAM. (900MB MEMDISK + 256MB for other kernel stuff + 768MB for user stuff). The machine(s) have a Pentium 4 Extreme Edition processor, with hyperthreading and SSE2, but no EM64T.
How can I boot the system, and get past that message? Decreasing the MEMDISK size is not possible too. It is at the smallest we can get with our userland + kernel + modules.
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Mar 14, 2011
I have an Acer 4810T laptop with Intel graphics. I run openSUSE 11.3, and am about to upgrade to 11.4. But both systems still have a very bad bug with screen brightness. The Fn+Arrow keys do change screen brightness, but after using them the system is rendered extremely sluggish and unresponsive. This sluggishness is most pronounced with a very important Wine app I need to use. The only way to fix the sluggishness is to reboot. With 11.4, the problem is worse because the system boots and automatically partially dims the screen, thus making it even more necessary to change the brightness. Neither Gnome nor KDE are able to change the brightness via their power managers. This means that I can't dim my screen automatically upon disconnecting the A/C power.
I have read many experiences from Ubuntu and openSUSE users, who all have the same problem. I have tried both intellegacy and the new intel drivers, and they both have the problem. I have read that some users have improved the situation by upgrading or downgrading the BIOS. Others have been experimenting with kernel patches:
[URL]
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Jun 29, 2010
I have a brand new computer with an ATI Radeon HD5850 video card I have a LCD monitor with a native resolution of 1920x1080. I installed Debian Testing 2.6.32-5-amd64
Because I have several machine, I use a KVM (switch keyboard) in the middle. This KVM is quite old but still work correctly only problem is that it don't forward the EDID information. Until now it wasn't a problem, and by specifying the correct parameters of the monitor in /etc/X11/xorg.conf , I always succeed to reach the 1920x1080 resolution
In installed the proprietary drivers from ATI Catalyst 10.6 (last version)
since I have 2 problems :
first in the console I used framebuffer in 1280x1024x32. Before installation of the ATI drivers, it was ok, now the screen is completely black !! on every tty (I didn't investigate much on this trouble yet)
Second problem:
I can't reach the native resolution of my monitor ! No matter what I'm doing, the best the driver propose is 1600x1200 !!
I made a lot of test and modification in xorg.conf but without success, it always goes back to this resolution and never propose something higher For information, if I connect the monitor directly to the video card (removing the KVM), everything is OK and the resolution is automatically set to 1920x1080
/etc/X11/xorg.conf
Section "ServerLayout"
Identifier "aticonfig Layout"
Screen 0 "aticonfig-Screen[0]-0" 0 0
EndSection
[Code].....
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Apr 16, 2010
I installed Debian Lenny on my old IBM thinkpad R40e but i can't change the brightness either with the Fn keys or with the brightness control debian has. i have searched around and it seems to be a problem with linux on IBM thinkpads but i don't know that much about this sort of thing so any help would be appreciated. if you need any more info then just ask.
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Sep 25, 2015
I decided to update all the software on my computer. Fortunately, it upgraded kernel version 3.14 to 3.16. I was happy to learn that suspend now worked on my laptop by calling pm-suspend, but it did not worked by closing the lid. So I search and found on debian's website that installing systemd and adding some config lines in /etc/systemd/logind.conf would sove the issue. So I followed the procedure and did like instructed, to end up with a computer that boots on black screen.
The last verbrose line I see on boot up is "kvm disabled by bios" and then it shutdown down the screen. The computer works, as I can login and shutdown by doing those operation blindly.
I tried removing systemd but it still does not work. If I use the old kernel 3.14 I can boot without any problem, but if I use kernel 3.16, I boot to a black screen. I remember successfully booting in 3.16 before installing systemd.
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Feb 3, 2016
I have a strange problem in my new debian 8.3 LXDE install. Every time I boot my laptop it goes in to sleep mode automatically after a min. It is a default install and I have not configured any power management options. How do I find out the reason for the automatic sleep and how can I rectify it?
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Jan 30, 2010
The login screen is always at maximum screen resolution, how can i change this?
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