Monitor Dim to black workaround breaks Power management settings in Kubuntu and Ubuntu 13.04

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catseye2500, thank you for reporting this bug to Ubuntu. Raring reached EOL on January 27, 2014.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

Is this reproducible in the latest release of Ubuntu via http://cdimage.ubuntu.com/daily-live/current/ ?

If so, please execute the following via a terminal in order for the necessary debugging information to be attached:
apport-collect 1175605

Christopher,

You can close this bug as it is fixed in 14.04 which I am currently using.
Thank you

Steve

On Fri, Dec 5, 2014 at 12:26 PM, Christopher M. Penalver <
<email address hidden>> wrote:

> catseye2500, thank you for reporting this bug to Ubuntu. Raring reached
> EOL on January 27, 2014.
> See this document for currently supported Ubuntu releases:
> https://wiki.ubuntu.com/Releases
>
> Is this reproducible in the latest release of Ubuntu via
> http://cdimage.ubuntu.com/daily-live/current/ ?
>
> If so, please execute the following via a terminal in order for the
> necessary debugging information to be attached:
> apport-collect 1175605
>
> ** Package changed: pm-utils (Ubuntu) => linux (Ubuntu)
>
> ** Changed in: linux (Ubuntu)
> Importance: Undecided => Low
>
> ** Changed in: linux (Ubuntu)
> Status: New => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1175605
>
> Title:
> Monitor Dim to black workaround breaks Power management settings in
> Kubuntu and Ubuntu 13.04
>
> Status in linux package in Ubuntu:
> Incomplete
>
> Bug description:
> System: Acer Aspire V3-771G-9456
>
> Intel I7 Core-3632QM 2.2GHZ
> 6 gig memory
> 120GB OGZ Solid State Drive
> Nvidia Optimus-Geforce GT 640M with 2GB dedicated video memory
>
> Kubuntu 12.10
> Kernel 3.5.0-28
> KDE 4.10.2
>
> Kubuntu 13.04
> Kernel 3.8.0-18
> KDE 4.10.2
>
> During boot up of live CD and after installation of both Kubuntu 12.10
> and 13.04 my screen dims to black. I had to manually using the
> keyboard adjust the brightness for my screen to see. I found a
> solution to this by adding the following to my grub menu:
>
> "acpi_backlight=vendor" so it looks like this in the menu:
>
> GRUB_DEFAULT=0
> GRUB_HIDDEN_TIMEOUT=0
> GRUB_HIDDEN_TIMEOUT_QUIET=true
> GRUB_TIMEOUT=0
> GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
> GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
> GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
>
> On both versions this allows me to boot up and the screen does not dim
> to black.
>
> The issue is for some reason, in Kubuntu 13.04 it breaks KDE power
> management settings so I can not dim the screen, suspend, or adjust
> the brightness of the monitor. When I take the acpi_backlight=vendor
> out of the grub menu the power management settings work fine in
> Kubuntu 13.04. I just have to manually adjust the brightness to login.
>
> The odd thing is the above configurations works flawlessly in Kubuntu
> 12.10. I have the “acpi_backlight=vendor” in my grub menu and the
> power management setting work just fine.
>
> BTW: I also did a fresh Install of Ubuntu 13.04 and it did the same as
> Kubuntu 13.04.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1175605/+subscriptions
>

catseye2500, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1175605/comments/3 regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.