Adding the following, as per Pauls instructions, seems to have worked on
my system (as far as suspend goes):
brt=`cat /sys/devices/virtual/backlight/acpi_video0/brightness`
abrt=`cat /sys/devices/virtual/backlight/acpi_video0/actual_brightness`
if [ $brt != $abrt ]; then
echo $abrt
Gabe, is it possible to find out the source code that sets the values
for brightness and actual_brightness and get them to agree after boot
up?
It certainly would be better to try to fix it at the upstream source.
My limited knowledge of /sys/ directory is that it's mostly created by
kernel
I really don't know anything about the code, but if you claim the
correct place to fix this is in the kernel then I recommend filing a bug
upstream, if one hasn't already been filed. Also make sure you test this
on the mainline kernel to make sure it's not caused by an Ubuntu patch.
** Package
Same problem. This is using 64Bit Ubuntu 10.04 on a VAIO VGN-FW373J. ATI
Mobility Radeon HD 3650.
The Bug has put me between a rock and a hard place (such that using
Ubuntu on this system looks undoable). The screen is too dim to use
after any Sleep or Hibernation.
Installing the 2D-3D driver
Patrick,
1) install the fglrx driver you desire
2) open terminal and enter:
$ find /sys/ -iname '*bright*'
3) post back the results and we'll help you with the rc.local script.
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Thank you, Pauls. The fglrx driver suggested by Ubuntu was the generic:
3D-accelerated proprietary graphics driver for ATI cards. Installing
the driver seemed to create more (and more serious) problems than it
solved, so I uninstalled it. (I'm not a gamer and probably don't need
accelerated
Is syncing brightness to actual_brightness an acceptable solution to
this problem? If so, can we push to get this fix into Lucid, or at least
Maverick?
** Tags removed: regression-release
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I am also experiencing this bug with 10.04. I just can't remember
having it with 9.10.
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Hmm... strange.
I overwrote the values in
/sys/devices/virtual/backlight/mbp_backlight/brightness and
/sys/devices/virtual/backlight/mbp_backlight/actual_brightness and now
the brightness seems to be properly saved on suspend.
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I am running 10.04 (final) on a MacBook Pro 5,5 and the workaround
described by Harm and pauls does not work. Even though after resume from
suspend the screen is clearly on maximum brightness, both
/sys/devices/virtual/backlight/mbp_backlight/brightness and
Marten, you might want to try something like this in your /etc/rc.local:
brt=`cat /sys/devices/virtual/backlight/mbp_backlight/brightness`
abrt=`cat /sys/devices/virtual/backlight/mbp_backlight/actual_brightness`
logger -t rc.local brightness was $brt , actual_brightness was $abrt
if [ $brt !=
Dell XPS M1330, Nvidia GeForce 8400M GS graphics card here. I can confirm
everything. I had this bug already on Karmic, did an upgrade to Lucid - the bug
continues.
pauls's script with Harm's mod works like a charm for me.
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Thanks Harm. I forgot that != is for strings and strings require
quotes. I guess I should have used -ne instead and it probably would
have worked. My script failed to set brightness to 7 on a subsequent
boot and I had the dim display upon resume again. But, after changing
it, it seems to
I wonder if there was a change in how acpi records / sets brightness and
gnome-power-manager was not updated to realize it.
I notice 2 different kernel locations on my system for brightness.
One is /sys/devices/virtual/backlight/acpi_video0/brightness and has the
value of 0 on boot up. This
@pauls: that's a great find and I can confirm that syncing brightness
to actual_brightness at boot time fixes the problem. I just had to
make a small modification to the script for it to work on karmic:
brt=`cat /sys/devices/virtual/backlight/acpi_video0/brightness`
abrt=`cat
This is still a problem on lucid gnome power manager here on a dell
inspiron with nvidia 7300
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@Sebastien: I don't think it is the same bug, I only have this problem
between suspend/resume cycles, I will test what happen on reboot, but as
far as I remember it was brightness was being saved OK.
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I can confirm i'm having the same problem/bug on Compaq CQ60-210US with
nvidia geforce 8200m. it is also plugged in when put to sleep, and is
still plugged in when resuming. ubuntu 9.10 Karmic
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I'm experiencing this problem on ASUS F3Jp with ATI Radeon X1700. So
same here, dimmed screen on the first resume, but bright on the second.
Thanks
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similar to bug #35223?
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** Changed in: gnome-power-manager (Ubuntu)
Importance: Undecided = Low
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I can confirm this bug in Lucid daily build 03/11 with nouveau driver on
a Dell Precision M90 (x86_64)
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** Tags added: karmic lucid
** Tags added: karmik
** Tags removed: karmic
** Tags added: karmic
** Tags removed: karmik
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I can confirm this bug with all the Ubuntu 9.10 updates to this date.
(HP dv5-1050en)
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Confirming this bug too on Dell Vostro 1500 with nvidia drivers.
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gateway mt3422
ubuntu 9.10 i386 up-to-date
using default gnome-power-manager settings
test done on ac power only. 100% reproducible as stated here.
screen too dim only on first resume from suspend after boot.
when checked, power-manager reports brightness at 100%.
adjusting gnome-power-manager
The one thing I have noticed is that when I resume from standby, the
display level is still at 100%.
Also, I am using AC power when entering standby and still on ac power
when resuming from standby
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This is also a problem for me. After a suspend the brightness is at its
lowest and said notifications show that the brightness is at its
highest.
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yes ,this bug is seen in karmic,i didnt have it in jaunty.
the brightness is at the lowest after suspend,it is very consistent.
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OK, putting this back to confirmed since this isn't fixed for everyone.
** Changed in: gnome-power-manager (Ubuntu)
Status: Incomplete = Confirmed
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I have gotten this bug again, though it's not as consistent as it use to
be; sometimes I suspend and it resumes at normal brightness, and
sometimes it's dimmed.
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This has been fixed for me, though I have no idea which updates did the
trick. Is anyone else still experiencing this after all Karmic updates
are applied?
** Changed in: gnome-power-manager (Ubuntu)
Status: Confirmed = Incomplete
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This is most definitely still a problem for me. I put my laptop to
sleep before posting this just to check. I am 100% up to date on
updates.
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Added regression-release tag since this worked before Karmic.
** Tags added: regression-release
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I can confirm this bug Gabe's last post.
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A weird part of this bug: after you resume from suspend and the
brightness is low, raising the brightness by one spawns a notification,
as it should, except the notification shows the brightness as full. If
you raise the brightness again, the notification will display the
correct (low) brightness
Can anyone test this on Kubuntu to make sure it is a bug in gnome-power-
manager and not pm-utils or something else?
** Changed in: gnome-power-manager (Ubuntu)
Status: New = Confirmed
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Bug #417610 may also be a duplicate of this bug, though the scope of
that bug report is currently limited to intel graphics cards.
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Confirming the bug. Dim on first resume after boot. Using non-free
Nvidia drivers.
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Also experiencing the same problem. Also using the non-free nvidia
kernel module. Screen brightness is dimmed only on first resume from
suspend, but I've also noticed that the screen is not
responding/redrawing correctly on every resume. New windows are drawn
but anything that happens within a
Same problem.
Yes, seems to only affect the first suspend operation between total shutdowns.
Not sure if these are also bugs, but:
1. If I suspend by closing the lid I'm asked for a pswd upon resumption,
whereas suspend by selecting suspend in shutdown menu does not require a
pswd to resume.
2.
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/33654420/Dependencies.txt
** Attachment added: DevkitPower.txt
http://launchpadlibrarian.net/33654421/DevkitPower.txt
** Attachment added: GConfNonDefault.txt
http://launchpadlibrarian.net/33654422/GConfNonDefault.txt
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