Asus UX32LN fails to suspend with laptop-mode-tools installed

[Dmitry]

After you install laptop-mode-tools (without any further actions taken) the UX32LN starts to fail to suspend if you put heavy load on it or work for more than a day. The symptoms are as follows: the keyboard backlight is is on, the screen is off, the fan works like crazy and the laptop drains battery. It does not matter if you suspend using keyboard, Unity button or close the lid. There is no other way other than to power off the laptop as it is going to continue on in that state infinitely. I also noticed that it hangs at shutdown. Removing laptop-mode-tools solves the problem.

If you work for just a few hours it is going to suspend normally.

Similar issues touch several other laptops from ASUS (e.g. UX303LN - https://bbs.archlinux.org/viewtopic.php?id=194413) and a distribution does not seem to matter much.

[Ritesh Raj Sarraf (rrs)]

Not responding on behalf of Ubuntu.

But as the upstream maintainer for Laptop Mode Tools, I find your bug
report completely bogus.

UX303LN is based on the Intel Haswell family of procs, which by itself
have issues with Linux suspend, at least up till Linux kernel 4.1.

LMT has *nothing* to do with Linux swsusp. If you find a suspend
failure, it is usually a kernel bug.

But yes, if you find that uninstalling LMT solves the problem, please
do so. I have already had this impression from 100s of users, calling
kernel bugs and LMT bugs.

FYI: Incase you have issues related to LMT, please file them upstream
at: https://github.com/rickysarraf/laptop-mode-tools

On Wed, 2015-08-05 at 15:44 +0000, Dmitry wrote:
> Public bug reported:
>
> After you install laptop-mode-tools (without any further actions
> taken)
> the UX32LN starts to fail to suspend if you put heavy load on it or
> work
> for more than a day. The symptoms are as follows: the keyboard
> backlight
> is is on, the screen is off, the fan works like crazy and the laptop
> drains battery. It does not matter if you suspend using keyboard,
> Unity
> button or close the lid. There is no other way other than to power
> off
> the laptop as it is going to continue on in that state infinitely. I
> also noticed that it hangs at shutdown. Removing laptop-mode-tools
> solves the problem.
>
> If you work for just a few hours it is going to suspend normally.
>
> Similar issues touch several other laptops from ASUS (e.g. UX303LN -
> https://bbs.archlinux.org/viewtopic.php?id=194413) and a distribution
--
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."

[Dmitry (rusdmitry)]

Sorry, didn't mean to be offensive. I am not (hopefully not yet) a kernel guy with a deep firmware knowledge and I just found a link between the two events. I have not seen much info about this so I figured I'd post some information as a bug report so there is more visibility for other people like me and there is at least a non-perfect solution to work with your laptop, though without optimizations.

Thank you for your contributions!