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I would like to install the 3.5 kernel backport to 12.04 as per the answer to this question.. The solution is to install the package linux-generic-lts-quantal. However, in the release docs and the answer, the package xserver-xorg-lts-quantal is also installed at the same time.

Question: if I want to install the first package, is it necessary to install the second?

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You don't need to install the xserver backport as well; you can just install the 3.5 kernel, as I noted in my answer in the link you refer to. –  user76204 Mar 21 '13 at 15:44
Thanks Mik. I'll delete this question. –  kalaracey Mar 21 '13 at 15:55
@Mik could you please see my comment on the answer in the link I referred to? Thank you –  kalaracey Mar 21 '13 at 16:03
@Mik I had some problems when mixed those (kernel "from quantal" and xserver "from precise", see here). Should I report it as a bug, ie it is supposed that linux*lts-quantal and xserver-xorg work well? –  Salem Mar 21 '13 at 17:14
@Salem They should be fine together, but it will depend on your particular system. I don't use Nvidia or Ati graphics these days so I'm not the best person to comment, but what I can say is that users with old SiS chips should not install the updated xorg packages, as they contain a serious bug. So, you always need to evaluate the situation, as I said, before you do any upgrades. –  user76204 Mar 21 '13 at 17:28
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