Comment 7 for bug 1319035
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| Stéphane Gourichon (stephane-gourichon-lpad) wrote | #7 |
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Hello Joseph,
## Mainline kernel: tested from Saucy, inconclusive so far
I tested mainline 3.15.0-
On that kernel, the machine ran hot due to nVidia optimus chip not turned off by bumblebee.
The problem did not appear, but it does not prove that it's fixed as it does not happen every time.
Two times the machine got stuck. Did not react to keyboard or mouse activity. Mouse pointer visible but still. AltGr-SysRq+S did flash the hard drive led, proving that the kernel was no crashed or panic. I rebooted with the REISUB sequence.
Two semi-hangs in two days with mainline kernel is clearly different from normal kernel where this just does not happen.
## Upgraded to Trusty, problem reproduced with standard kernel
I just installed Trusty two days ago and experienced the problem again the next day. Now running 3.13.0-24-generic.
It looks like Trusty can turn off nVidia chip without installing bumblebee because laptop did not turn hot.
## Next step offered: run mainline kernel on Trusty
So I'm considering to run mainline kernel on Trusty as it will be easier.
Comments welcome.