oops, totally forgot this is still open, the problem turned out to be a
completely stuck fan wrapped in filth ... cleaning it ave the system
proper values so thermald does the right thing now.
** Changed in: linux (Ubuntu)
Status: Confirmed = Invalid
** Changed in: linux (Ubuntu Vivid)
one thing i noticed is that after dropping intel_pstate=disable from teh kernel
commandline, thermald does not seem to star/run at all .. starting it manually
i captured http://paste.ubuntu.com/11541063/
note that the behavior gets minimally better with thermald running, but
switching
** Tags removed: kernel-key
** Tags added: kernel-da-key
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https://bugs.launchpad.net/bugs/1460399
Title:
ivybridge system gets completely unusable after upgrade to vivid
I suggest trying thermald to see if this helps
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https://bugs.launchpad.net/bugs/1460399
Title:
ivybridge system gets completely unusable after upgrade to vivid
thanks to
** Also affects: linux (Ubuntu Vivid)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Vivid)
Importance: Undecided = High
** Changed in: linux (Ubuntu Vivid)
Status: New = Confirmed
** Tags added: kernel-key
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In Sandy bridge the system is not rendered completely unusable. But it
still becomes hot, with fans constantly turning on and off, and the
computer powering off from time to time.
And this did not happen in Ubuntu 14.10.
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Also affects Sandy Bridge, so probably it is affecting several
processors.
** Changed in: linux (Ubuntu)
Importance: Undecided = High
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just for completeness (in case someone looks for a wrokaround), adding
intel_pstate=disable to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub
and running sudo update-grub got me the ondemand driver back and got the
system back to behave as stable as in 14.10.
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