Re: overcoming known kernel bug
On 12/12/17 05:30, Brian Oney wrote:
I am having trouble with my 2016 lenovo thinkpad yoga 11e (3rd gen) running
the current version of debian stable (stretch). The on wake-from-suspend
the fan runs on high.
Specifically, I have:
~ $ uname -a
Linux tinkbox 4.9.0-4-amd64 #1 SMP Debian 4.9.51-1 (2017-09-28) x86_64
GNU/Linux
On wake-from-suspend:
~ $ sensors
thinkpad-isa-0000
Adapter: ISA adapter
fan1: 6125 RPM
acpitz-virtual-0
Adapter: Virtual device
temp1: +65.0°C (crit = +90.0°C)
The acpitz-virtual-0 pegs the temperature at 65°C and won't let it go.
Therefore the fan attempts liftoff.
I could attach the output of 'reportbug kernel', but the problem is known
and the bug is described in:
https://bugzilla.kernel.org/show_bug.cgi?id=196129
The bug is present up until it's fix in kernel 4.13.4 or something around
that time. The solution is to install a much newer kernel (or downgrade).
Being lazy I tried to just install the latest backported kernel
(linux-image-4.13.0-0.bpo.1-amd64). That doesn't work.
What I find most interesting would be to compile a slimmer, faster kernel,
but I have failed (after consulting the debian kernel handbook). One thing
or the other doesn't work afterwards. Also, I run out of disk space lately
(15Gb is huge!) My idea was to use the old kernel configuration (with
'make olddefconfig'), but there are so many new options and I honestly have
no clue how to get an overview and make an informed decision.
I would report this as a low priority kernel bug but it's (far) upstream.
It's also a known problem, which isn't necessarily debian's problem.
I would appreciate any advice. I bought this laptop because it's tough and
has a good battery. Any laptop that misbehaves on wake-from-suspend is not
a very useful laptop (Imagine a meeting with a constantly whining laptop).
Thanks in advance!
Debian 9 on certain laptops seems to have polling loop issues that
manifest when the graphical login screen is displayed and when the
screen saver is displayed. These are deal-breaker bugs that will burn
up your CPU and suck your battery dry. Here's the bug report for my
Dell Inspiron E1505/6400:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878313
The fact that it has been ignored for 2 months is not encouraging.
My work-around has been to pull the battery, plug in the power adapter, run:
cpufreq-set -g powersave
to minimize heating/ damage when I log out/ screen lock, and run:
cpufreq-set -g ondemand
when I log in.
I read a post somewhere that someone had found a way to muck with
configuration settings and make at least some of the problems go away,
but I don't have that URL.
Looking at the Debian Testing kernel packages, it doesn't look like
Testing includes the bug fixes you mention (?):
https://packages.debian.org/testing/kernel/
Ideas:
1. Go older -- e.g. Debian 8 or Debian 7.
2. Go bleeding edge -- e.g. Debian Unstable, Fedora, or Arch.
3. Run Windows and a hypervisor.
David
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