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Backlight broken again in 12.04
The recent header updates broke the backlight controls in 12.04.
eryn@eryn-ultrabook:~$ uname -a
Linux eryn-ultrabook 3.2.0-51-generic #77-Ubuntu SMP Wed Jul 24 20:18:19 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Normally I wait until I see updates from the ppa come through before updating the Linux headers. I thought I saw one a week ago or so, so I figured I was safe-- I was wrong :(
veryno
31 Posts
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August 6th, 2013 10:00
Bump. Just want to make sure this has been seen. Can a Dell representative confirm that a fix is in the works?
veryno
31 Posts
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August 6th, 2013 11:00
Hrm, strange. Those packages at those versions are not listed in `dpkg -l`. I do have the Sputnik PPA in my sources, and earlier versions of the kamal16 files.
The one thing I have installed that's running at that version is linux-libc-dev.
Even though I have updated my sources several times, it doesn't see any updates. This is intermediate+ level debugging-- can you (or anyone else!) help me figure out what's happening?
kb4xley
25 Posts
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August 6th, 2013 11:00
Do you have these installed on your system anywhere?:
linux-headers-3.2.0-52-generic_3.2.0-52.78+kamal16~DellXPS_amd64.deb
linux-headers-3.2.0-52_3.2.0-52.78+kamal16~DellXPS_all.deb
linux-image-3.2.0-52-generic_3.2.0-52.78+kamal16~DellXPS_amd64.deb
These packages were uploaded to the sputnik ppa on the 26th and should supersede what you're running on your machine currently, as it looks to be a stock 12.04 kernel instead of the modified ones with all the backlight fixes.
kb4xley
25 Posts
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August 6th, 2013 12:00
Yep. It does the same thing for me here...I just get the libc-dev package if I run an apt-get update and apt-get dist-upgrade.
For now, you can get the latest ppa kernel by running this command:
"sudo apt-get install linux-image-3.2.0-52-generic linux-headers-3.2.0-52-generic linux-headers-3.2.0-52"
...then once you reboot your backlight should start working again. I'll let the maintainer know what's going on with regard to packages from his PPA.
veryno
31 Posts
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August 6th, 2013 13:00
Looks like it worked like a charm. Thank you!
kamalmostafa
8 Posts
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August 6th, 2013 14:00
Oops, this problem occurred due to an oversight on my part (I didn't upload a 3.2.0-51 kernel to the PPA but skipped straight to -52, not realizing that -52 was still pending in the the Ubuntu proposed archive). I've just fixed that, so the regular update processes should be delivering the -52 kernel from the PPA by default now.
veryno
31 Posts
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August 6th, 2013 16:00
Thank you too, Kamal :)