Thanks everyone,<div><br></div><div>I hope it is fixed now. I had the ppa:voria/ppa repository in the sources.list file in the past as I had samsung tools installed but it seems that with one of the many upgrades it was deleted. Just put it back, run the upgrades and the new samsung-tools is now installed. Lets see if it works. This box is hardly ever off the mains power and I note this is reported as a bug that occurs when on battery power so maybe I have had this problem for a long time and it was only apparent when travelling and using battery. It is still extremely curious that frozen-bubble stops the brightness oscillation. </div>
<div><br></div><div>Stripes<br><br><div class="gmail_quote">On 17 December 2012 20:23, Dan Caseley <span dir="ltr"><<a href="mailto:dan@caseley.me.uk" target="_blank">dan@caseley.me.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<p dir="ltr">Same advice. <br>
I have a Samsung Q210 with Mint 14.<br>
Brightness was perpetually at lowest.<br>
The samsung-tools package fixed it.</p><div class="HOEnZb"><div class="h5">
<div class="gmail_quote">On 17 Dec 2012 08:49, "Jason Irwin" <<a href="mailto:jasonirwin73@gmail.com" target="_blank">jasonirwin73@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 17/12/12 05:08, stripes theotoky wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Recently following an upgrade to Ubuntu 12.04 using the gnome desktop I<br>
find that the brightness varies from almost black to full brightness<br>
</blockquote>
Do you have the Samsung specific tools installed?<br>
<br>
PPA: <a href="https://launchpad.net/~voria/+archive/ppa" target="_blank">https://launchpad.net/~voria/+<u></u>archive/ppa</a><br>
Froums: <a href="http://www.voria.org/forum/index.php" target="_blank">http://www.voria.org/forum/<u></u>index.php</a><br>
Not everything works 100%, but it might stop the brightness cycling as it appears to some updates for backlight management.<br>
<br>
There is also this in the forums: <a href="http://ubuntuforums.org/showthread.php?p=11362130" target="_blank">http://ubuntuforums.org/<u></u>showthread.php?p=11362130</a><br>
Which discusses this exact issue and references the Samsung tools (as well as some other power tweaks).<br>
<br>
There are no bugs in Launchpad about this cycling issue; but there are some about brightness keys not working which reference the above tools. Might be worth your while raising a bug I guess.<br>
<br>
I did stumble across this though: <a href="http://askubuntu.com/questions/67262/brightness-issues-on-a-samsung-n220" target="_blank">http://askubuntu.com/<u></u>questions/67262/brightness-<u></u>issues-on-a-samsung-n220</a><br>
So all the answers seem to lead to the same place.<br>
<br>
I only know about this set of tools because I was seriously considering a Samsung NP535 or similar. Just waiting for the post-Yule sales.<br>
<br>
Answers powered by Brain 0.9a and the mighty DuckDuckGo :-)<br>
<br>
-- <br>
Jason Irwin<br>
<br>
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</blockquote></div>
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