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#1 2021-01-14 17:55:49

diesel1
Arch Linux f@h Team Member
From: Leeds, UK.
Registered: 2007-07-19
Posts: 267

SIGSEVG issues and system crashes with kernel =>5.10

Hi,

Having run Arch for years on my Athlon II X4 630, I have a strange issue with my system when running kernel 5.10.

When running 5.10 my system will be unstable with software returning SIGSEVG errors and applications from pacman to chromium crashing without terminating at all.  A strange thing with this is that the same OS and kernel installed on the same harware in Virtual Machine Manager runs fine.

If I run the LTS kernel the system runs fine which is okay for now, but soon enough that kernel will be obsolete and a newer kernel will be needed. I have tried other (admittedly Arch-based or Arch-like) distrbutions and exactly the same issues manifest themselves when I switch from a pre-5.10 kernel to 5.10+ kernels.

I was not sure where to ask about this but given the kernel seems to be at the centre of my issues I came here.

Does anyone have any similar issues or know of any leads I can follow?

Thanks,

Diesel1.

Last edited by diesel1 (2021-01-14 23:27:57)


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#2 2021-01-14 18:01:18

loqs
Member
Registered: 2014-03-06
Posts: 12,949

Re: SIGSEVG issues and system crashes with kernel =>5.10

If there is no commonality in the segfaults you may have to resort to bisecting between 5.9 and 5.10 to locate the causal commit.

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#3 2021-01-14 18:35:39

diesel1
Arch Linux f@h Team Member
From: Leeds, UK.
Registered: 2007-07-19
Posts: 267

Re: SIGSEVG issues and system crashes with kernel =>5.10

Thanks for the quick response.

That sounds a little beyond my knowledge at the moment but I will try!

Diesel1.


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#4 2021-01-14 19:07:01

loqs
Member
Registered: 2014-03-06
Posts: 12,949

Re: SIGSEVG issues and system crashes with kernel =>5.10

You could first try linux-mainline 5.11-rc3 available built from Unofficial_user_repositories#miffe to see if the issue has been fixed upstream.

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#5 2021-01-14 19:14:07

diesel1
Arch Linux f@h Team Member
From: Leeds, UK.
Registered: 2007-07-19
Posts: 267

Re: SIGSEVG issues and system crashes with kernel =>5.10

Wow, thanks again for the reply.

I will try that in the next few hours and update the thread.

All the best,

Diesel1.

*EDIT*

It didn't cross my mind to go upstream for the kernel but after running for around 2.5 hours with miffe's 5.11 kernel it seems very stable. I tried nouveau drivers and ran blender, kdenlive, libreoffice-fresh and compiled a few aur packages with no issues at all.

Although I am very pleased and thankful for your advice loqs, is there a way for me to identify the specific issue and report it to help others?

Again, thank you,

Diesel1.

Last edited by diesel1 (2021-01-14 23:18:57)


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#6 2021-01-15 16:35:30

loqs
Member
Registered: 2014-03-06
Posts: 12,949

Re: SIGSEVG issues and system crashes with kernel =>5.10

The problem with identifying the fix is that the cause is also unknown.  You could post the output of # coredump info match for a selection of the segfaults,  see if someone can narrow down where in the kernel the issue is.  Otherwise it would be the suggestion I made in post #2 to bisect to find the cause,  you could also use reverse bisection to find the fix.

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#7 2021-01-17 03:35:05

diesel1
Arch Linux f@h Team Member
From: Leeds, UK.
Registered: 2007-07-19
Posts: 267

Re: SIGSEVG issues and system crashes with kernel =>5.10

loqs wrote:

The problem with identifying the fix is that the cause is also unknown.  You could post the output of # coredump info match for a selection of the segfaults,  see if someone can narrow down where in the kernel the issue is.  Otherwise it would be the suggestion I made in post #2 to bisect to find the cause,  you could also use reverse bisection to find the fix.

Thanks for those suggestions. Given the age of this cpu and the fact that the future kernels seem to be stable and also taking into account my limited technical kernel skills, it might just be that I have to let this go.  If someone wants to direct me in how to isolate the specific problem I will be happy to follow guidance. When you talked about the mainline kernel I tried to remember when I last compiled a kernel. It must have been when I ran Stampede Linux!

Thanks so much for your support,

Diesel1.


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