Lubuntu 11.10 Brightness issue

[decomp]

Hi All!

I am running Lubuntu 11.10 and when my display turns off, the screen does not return to full brightness afterwards. It is only half brightness and I cannot get it to full again. The function keys are working but will not go any higher than halfway brightness.

The problem is with xfce4-power-manager but I'm not sure what.

I have not had this problem in debian+lxde or ubuntu 10.10+lxde.

Anyone else have this issue? why wont xfce4-power-manager return my screen to full brightness anymore?

[decomp]

Still can't figure this one out :(

[TutenStain]

Hi All!

I am running Lubuntu 11.10 and when my display turns off, the screen does not return to full brightness afterwards. It is only half brightness and I cannot get it to full again. The function keys are working but will not go any higher than halfway brightness.

The problem is with xfce4-power-manager but I'm not sure what.

I have not had this problem in debian+lxde or ubuntu 10.10+lxde.

Anyone else have this issue? why wont xfce4-power-manager return my screen to full brightness anymore?

Same here on my laptop Ubuntu 11.10 GNOME 3.

[amjjawad]

Hi there,

I'm a member of Lubuntu Team and I'll be very glad to help :)
I'll do some search for your problem guys and get back to you as soon as I can. I'm leaving now and it's too late here already. Will keep you posted ;)

Thanks for using Lubuntu :)

[amjjawad]

Same here on my laptop Ubuntu 11.10 GNOME 3.

Sorry but your problem is different that the Original Poster's Problem. He/She is using Lubuntu while you are using Ubuntu. Two different Desktop Environemnt.

Please search the forum for a similar case to yours and if you couldn't find, try here: www.googlubuntu.com.
If you couldn't find, start your own thread :)

Thanks!

[decomp]

So I disabled xfce4-power-manager at startup and it's still happening so it's not the power manager.

Saw something about acpi somewhere?

Saw an old suggestion here (http://www.linuxscrew.com/2007/10/25/ajust-lcd-brightness-from-command-line-works-at-dell-1501/) but it didn't work for me.

[llelectronics]

You could try xbacklight to adjust the brightness.

[decomp]

You could try xbacklight to adjust the brightness.

That did the trick! Your a savior! I can use my computer! Now if I could only figure out what's causing it..

Edit: Ooh I am also totally binding this to a hot key.

[dondada]

I've been experiencing this same dark screen issue on my eeePC 1005 HAB running Lubuntu 11.10. It actually only started happening recently - like a month ago.

xbacklight has solved this for now.

[amjjawad]

That did the trick! Your a savior! I can use my computer! Now if I could only figure out what's causing it..

Edit: Ooh I am also totally binding this to a hot key.

Kindly mark your thread as SOLVED:

http://ubuntuforums.org/picture.php?albumid=2161&pictureid=7263

Thank you :)

[decomp]

Well I still wouldn't say it's solved.. it's a nice little fix but it's pretty messy and doesn't resolve the original issue.

Also I recently tested out standard ubuntu 11.10 and had the same issue.

[rodrigo.miguel]

Might help:

Brightness control for Lubuntu / LXDE (when the Fn key does not work)

http://linuxlike.blogspot.com/2012/0...untu-lxde.html

[satanicat]

Hello everyone.
I have the exact same problem with lubuntu on my netbook and i could not solve it using xbacklight (backlight wouldnt do anything when i put the command "xbacklight -set -%100" or anything simillar to that.

anyone can help me? what can it be?


Thanks.

PS: a cute picture of my cat as a present.
http://i.imgur.com/QpO8D.jpg

[Toz]

Hello and welcome to the forums, satanicat.

What is the make and model of your netbook?
And can you open a terminal window, type in the following commands, and post back the results:


cat /proc/cmdline
sudo lspci -vnn | grep -A10 VGA
ls /sys/class/backlight
lsmod

[satanicat]

Hello and welcome to the forums, satanicat.

What is the make and model of your netbook?
And can you open a terminal window, type in the following commands, and post back the results:


cat /proc/cmdline
sudo lspci -vnn | grep -A10 VGA
ls /sys/class/backlight
lsmod


00:02.0 VGA compatible controller [0300]: Intel Corporation N10 Family Integrated Graphics Controller [8086:a011] (prog-if 00 [VGA controller])
Subsystem: Samsung Electronics Co Ltd Device [144d:c08f]
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at f0300000 (32-bit, non-prefetchable) [size=512K]
I/O ports at 18d0 [size=8]
Memory at d0000000 (32-bit, prefetchable) [size=256M]
Memory at f0000000 (32-bit, non-prefetchable) [size=1M]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Kernel driver in use: i915


---------------------


Here it is.
Also, its a Samsung n145 Plus netbook.
Thank you.

[Toz]

Have a look at this PPA: https://launchpad.net/~voria/+archive/ppa and this forum (http://www.voria.org/forum/search.php?sid=fc01402965f05626132020cedcdbd3c8). It seems to fix the brightness issue on samsung netbooks.

EDIT: Here is another link: https://www.ultimateeditionoz.com/forum/viewtopic.php?p=21783

[satanicat]

Have a look at this PPA: https://launchpad.net/~voria/+archive/ppa and this forum (http://www.voria.org/forum/search.php?sid=fc01402965f05626132020cedcdbd3c8). It seems to fix the brightness issue on samsung netbooks.

EDIT: Here is another link: https://www.ultimateeditionoz.com/forum/viewtopic.php?p=21783

Toz, i did all that and maybe more and i thought i've solved it.
the brightness was ok and everything. but sometimes, i close the lid and after opening it again the screen looks messed up (looks like double screens looking bad) of course that when i restart, everything seems to be ok again. Well.. the brightness issue comes and goes, now, for example, it was functional in the morning, i closed the lid and the thing with the screen happened after i opened it. now the brightness is at 50% and nothing happens when i move it.

im trying to convince myself all this is a software bug, i dont see how the hardware can be wrong.



Please help.


Do you think i should install another distro?

Maybe there are alternative samsung drivers to download?

sorry if i messed up with the english.

-
Also, i want to disable the scrolling (because its all messed up and it jumps up all the time) so i go to gpointing-device-settings and i see "two finger scroll" is disabled. so i have to enable it, and then disable it again. only then the scrolling is disabled.


is there a less stupid way to solve it?


cheers.

[Toz]

Toz, i did all that and maybe more and i thought i've solved it.
the brightness was ok and everything. but sometimes, i close the lid and after opening it again the screen looks messed up (looks like double screens looking bad) of course that when i restart, everything seems to be ok again.
Does your computer go to sleep (suspend) or hibernate when you close the lid?

Well.. the brightness issue comes and goes, now, for example, it was functional in the morning, i closed the lid and the thing with the screen happened after i opened it. now the brightness is at 50% and nothing happens when i move it.
The second link (https://www.ultimateeditionoz.com/forum/viewtopic.php?p=21783) had some further instructions involving setting kernel parameters in the grub line and adjusting udev rules. Did you follow those steps as well?


im trying to convince myself all this is a software bug, i dont see how the hardware can be wrong.
I would tend to agree.




Please help.


Do you think i should install another distro?
The choice is yours. Since I don't own a samsung netbook, I can't comment. However, from the link above, it looks like ubuntu should work fine with your netbook once its configured properly.


Maybe there are alternative samsung drivers to download?

sorry if i messed up with the english.
No worries. Lets see if we can get this to work first.


-
Also, i want to disable the scrolling (because its all messed up and it jumps up all the time) so i go to gpointing-device-settings and i see "two finger scroll" is disabled. so i have to enable it, and then disable it again. only then the scrolling is disabled.


is there a less stupid way to solve it?


cheers.
Try this:
1. Create a script to disable the scrolling:

gksudo leafpad /usr/local/bin/disable_scroll

2. Copy & Paste this information into the file:


#!/bin/bash

/usr/bin/synclient VertTwoFingerScroll=0
/usr/bin/synclient HorizTwoFingerScroll=0


3. Save the file.

4. Make the file executable:

sudo chmod +x /usr/local/bin/disable_scroll

5. Add this new script (/usr/local/bin/disable_scroll) to your startup files. This might help: http://wiki.lxde.org/en/Autostart

[satanicat]

What is a .desktop file?

(im tying to follow this part...http://wiki.lxde.org/en/Autostart)


By the way, thanks for your help!

Also, no, the netbook does nothing when i close the lid (as i wanted it to be)


The second link (https://www.ultimateeditionoz.com/fo...ic.php?p=21783) had some further instructions involving setting kernel parameters in the grub line and adjusting udev rules. Did you follow those steps as well?


I think i've made all that, i've found that info in some other pages too and seems to do nothing.

Well.. as i told you, the problem was solved for an instance.




-
If i upgrade to Oneric Ocelot, i would upgrade to ubuntu or it will be lubuntu: oneric ocelot?

dont laugh at me.


haha, cheers.

[satanicat]

$ ln -s /usr/local/bin/disable_scroll ~/.config/autostart/

Is that correct?

edit:

derp, i have to create the directory first, right?


Any clue about the screen messing up?

[Toz]

I'm sorry but I don't use lubuntu, so I'm just going by the instructions in that link. First try running the script to see if it properly disables the two finger scroll:

/usr/local/bin/disable_scroll

If it works, try this:


leafpad ~/.config/autostart/disable_scroll.desktop
...with the following content:


[Desktop Entry]
Type=Application
Exec=/usr/local/bin/disable_scroll

...and reboot to test.

[Toz]

Any clue about the screen messing up?

When the screen is messed up, try Ctrl+Alt+F1 to go to TTY1 then Ctrl+Alt+F7 to return back to the GUI. Does this fix the problem?

[satanicat]

When the screen is messed up, try Ctrl+Alt+F1 to go to TTY1 then Ctrl+Alt+F7 to return back to the GUI. Does this fix the problem?

Totally works man! :guitar:

[Toz]

Interesting. So then something must be happening when you close the lid. Can you post back the contents of the /var/log/pm-suspend.log file? I'm curious to see if it has some clues.

And can you also post back the contents of:
- ~/.xsession-errors
- /var/log/Xorg.0.log

[miegiel]

Maybe I shouldn't butt in, but I put this

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
in my /etc/default/grub to make my backlight work (eee netbook running debian testing).

ps I forgot to add that you need to run

sudo update-grub
in the terminal to make the change to GRUB take effect and reboot.


A bit stupid of me ](*,) to leave that out, not everyone's familiar with making changes to grub.

[satanicat]

Interesting. So then something must be happening when you close the lid. Can you post back the contents of the /var/log/pm-suspend.log file? I'm curious to see if it has some clues.

And can you also post back the contents of:
- ~/.xsession-errors
- /var/log/Xorg.0.log

Here you go.

pm-suspend.log http://pastebin.com/e3WskxcB

xorg.0.log http://pastebin.com/yzzTbFJ2

.xsession-errors http://pastebin.com/Djh6B5fD

[satanicat]

Maybe I shouldn't butt in, but I put this

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
in my /etc/default/grub to make my backlight work (eee netbook running debian testing).

I did that before and nothing changed.




ps I forgot to add that you need to run

sudo update-grub
in the terminal to make the change to GRUB take effect and reboot.


A bit stupid of me ](*,) to leave that out, not everyone's familiar with making changes to grub.


OHHHHHHH interesting.

gonna reboot now.

[satanicat]

Still can't change the brightness but it seems at %100 now.

[satanicat]

Now it seems at %50 again.
what a nightmare.

(bump)

[Toz]

Here you go.

pm-suspend.log http://pastebin.com/e3WskxcB

xorg.0.log http://pastebin.com/yzzTbFJ2

.xsession-errors http://pastebin.com/Djh6B5fD

According to your pm-suspend.log file, your notebook is suspending when you close the lid.

Just to confirm: Does brightness work okay when you power-up your notebook? Function keys and all?

And does it only go screwy after you close the lid?

[satanicat]

The netbook does nothing when i close the lid. im pretty sure about that.

the brightness sometimes starts at 50% and sometimes at 100%, in both cases the ammount of brightness cant be changed. (but pressing Fn + left / right arrow shows the brightness bar moving left and right, changing nothing)

[Toz]

The netbook does nothing when i close the lid. im pretty sure about that.
Lets determine this for sure. First, clear out the pm-suspend.log file:

sudo mv /usr/log/pm-suspend.log /usr/log/pm-suspend.log.BAK
..then close the lid. Wait 1 minute and open it again. Was a new /var/log/pm-suspend.log file created and if so, what are the contents? If there is no new log file, then it didn't suspend.


the brightness sometimes starts at 50% and sometimes at 100%, in both cases the ammount of brightness cant be changed. (but pressing Fn + left / right arrow shows the brightness bar moving left and right, changing nothing)

Lets see if we can get a workaround to work. Can you post back the results of the following commands:


lsmod
cat /proc/cmdline
ls /sys/class/backlight
sudo lspci -vnn | grep -A10 VGA

[satanicat]

Lets see if we can get a workaround to work. Can you post back the results of the following commands:


lsmod
cat /proc/cmdline
ls /sys/class/backlight
sudo lspci -vnn | grep -A10 VGA


pascual@satanico:~$ lsmod
Module Size Used by
parport_pc 32111 0
ppdev 12849 0
dm_crypt 22463 0
snd_hda_codec_realtek 255882 1
arc4 12473 2
ath9k 103633 0
snd_hda_intel 24113 7
binfmt_misc 13213 1
snd_hda_codec 90901 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 13274 1 snd_hda_codec
snd_pcm 80042 4 snd_hda_intel,snd_hda_codec
mac80211 257001 1 ath9k
snd_seq_midi 13132 0
snd_rawmidi 25269 1 snd_seq_midi
joydev 17322 0
ath9k_common 13611 1 ath9k
ath9k_hw 300328 2 ath9k,ath9k_common
snd_seq_midi_event 14475 1 snd_seq_midi
ath 19141 2 ath9k,ath9k_hw
snd_seq 51291 2 snd_seq_midi,snd_seq_midi_event
samsung_backlight 13487 0
cfg80211 156212 3 ath9k,mac80211,ath
snd_timer 28659 4 snd_pcm,snd_seq
snd_seq_device 14110 3 snd_seq_midi,snd_rawmidi,snd_seq
uvcvideo 66851 0
snd 55295 19 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec, snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,sn d_seq_device
videodev 75143 1 uvcvideo
psmouse 73312 0
soundcore 12600 1 snd
serio_raw 12990 0
snd_page_alloc 14073 2 snd_hda_intel,snd_pcm
lp 13349 0
parport 36746 3 parport_pc,ppdev,lp
dm_raid45 88410 0
xor 21860 1 dm_raid45
btrfs 527388 0
zlib_deflate 26594 1 btrfs
libcrc32c 12543 1 btrfs
i915 451053 2
ahci 21591 4
drm_kms_helper 40971 1 i915
libahci 25548 1 ahci
sky2 49172 0
drm 184164 3 i915,drm_kms_helper
i2c_algo_bit 13184 1 i915
video 18951 1 i915
pascual@satanico:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-2.6.38-13-generic root=UUID=0284ff86-656b-48b7-9dfc-be91cebac492 ro acpi_sleep=nonvs quiet acpi_osi=Linux acpi_brightness=vendor splash vt.handoff=7
pascual@satanico:~$ ls /sys/class/backlight
acpi_video0 samsung
pascual@satanico:~$ sudo lspci -vnn | grep -A10 VGA

[Toz]

pascual@satanico:~$ lsmod
Module Size Used by
parport_pc 32111 0
ppdev 12849 0
dm_crypt 22463 0
snd_hda_codec_realtek 255882 1
arc4 12473 2
ath9k 103633 0
snd_hda_intel 24113 7
binfmt_misc 13213 1
snd_hda_codec 90901 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 13274 1 snd_hda_codec
snd_pcm 80042 4 snd_hda_intel,snd_hda_codec
mac80211 257001 1 ath9k
snd_seq_midi 13132 0
snd_rawmidi 25269 1 snd_seq_midi
joydev 17322 0
ath9k_common 13611 1 ath9k
ath9k_hw 300328 2 ath9k,ath9k_common
snd_seq_midi_event 14475 1 snd_seq_midi
ath 19141 2 ath9k,ath9k_hw
snd_seq 51291 2 snd_seq_midi,snd_seq_midi_event
samsung_backlight 13487 0
cfg80211 156212 3 ath9k,mac80211,ath
snd_timer 28659 4 snd_pcm,snd_seq
snd_seq_device 14110 3 snd_seq_midi,snd_rawmidi,snd_seq
uvcvideo 66851 0
snd 55295 19 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec, snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,sn d_seq_device
videodev 75143 1 uvcvideo
psmouse 73312 0
soundcore 12600 1 snd
serio_raw 12990 0
snd_page_alloc 14073 2 snd_hda_intel,snd_pcm
lp 13349 0
parport 36746 3 parport_pc,ppdev,lp
dm_raid45 88410 0
xor 21860 1 dm_raid45
btrfs 527388 0
zlib_deflate 26594 1 btrfs
libcrc32c 12543 1 btrfs
i915 451053 2
ahci 21591 4
drm_kms_helper 40971 1 i915
libahci 25548 1 ahci
sky2 49172 0
drm 184164 3 i915,drm_kms_helper
i2c_algo_bit 13184 1 i915
video 18951 1 i915
Thanks

pascual@satanico:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-2.6.38-13-generic root=UUID=0284ff86-656b-48b7-9dfc-be91cebac492 ro acpi_sleep=nonvs quiet acpi_osi=Linux acpi_brightness=vendor splash vt.handoff=7
Can you try removing the acpi_osi=Linux acpi_brightness=vendor kernel parameters from /etc/default/grub, rerunning "sudo update-grub", rebooting, and seeing whether the brightness keys work now?

And if not, try adding "acpi_backlight=vendor" (notice its backlight, not brightness), rerunning "sudo update-grub", rebooting and checking again.


pascual@satanico:~$ ls /sys/class/backlight
acpi_video0 samsung
If the above kernel parameters don't work, run these commands and post back the results:

cat /sys/class/backlight/acpi_video0/max_brightness
cat /sys/class/backlight/acpi_video0/brightness
cat /sys/class/backlight/samsung/max_brightness
cat /sys/class/backlight/samsung/brightness

pascual@satanico:~$ sudo lspci -vnn | grep -A10 VGA
Were there no results? It should have responded with something.

[satanicat]

I just updated to 11.10 and the brightness keys are working.

it takes a little more the turning off, but meh.


also..
is there any software center for lubuntu? i want to install some apps that i cant.

[Toz]

is there any software center for
lubuntu? i want to install some apps that i cant.

Its the same software centre for all *buntus. Which apps are you trying to install?

[satanicat]

edit: nothing now, thanks, everything taken care of.

[Rock Storm]

I already posted a solution in another thread which I believe refers to the same issue.

http://ubuntuforums.org/showthread.php?p=12395614#post12395614