Re: [CentOS] Kernel crash

[Diego Farias]

I'm sorry for all this trouble; I followed ElRepo's instructions and now I
have wifi! (someday I will fix bluetooth).

2017-10-12 18:52 GMT-03:00 Diego Farias :

> By the way, attached is the kernel panic screenshot, apparently it is
> related to cfg80211.
>
> On Oct 12, 2017 5:46 PM, "Diego Farias"  wrote:
>
>> Hi everyone,
>>
>> I updated the kernel from 3.10.0-514.16.1.el7.x86_64
>> to  3.10.0-693.2.2.el7.x86_64 . While I was following these steps
>> https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom (I knew that I
>> needed to compile again everything) in order to activate WIFI, the laptop
>> crashed doing
>>
>> # depmod -a
>> # modprobe wl
>>
>> Noting that I replaced (naively) # depmod $(uname -r) from the guide
>> (stupid mistake, I use tcsh and the command above didn't work; that's why
>> the replacement).
>>
>> After the crash, I had to manually shutdown the laptop. Then, I booted
>> the same kernel and it went to 'emergency mode'; as I don't have the root
>> password (second stupid mistake; I'm superuser but I don't remember the
>> root password/nor I can change it -I don't know-) I couldn't do a thing.
>>
>> Then, I booted the previous kernel, 3.10.0-514.16.1.el7.x86_64 (which
>> works fine), removed 3.10.0-693.2.2.el7.x86_64 (yum remove), and
>> reinstalling it from zero. Oddly,
>> when I boot with the new kernel, the laptop crashes before login; the
>> caps lock light tilts and nothing happens. I've done this several times and
>> the same.
>>
>> I know I can use the older kernels to work, but I really want to fix this
>> if possible.
>>
>> Thanks in advance.
>>
>>
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Re: [CentOS] Kernel crash

[S. Tindall]

On 10/12/2017 05:32 PM, Yves Bellefeuille wrote:

  I updated the kernel from 3.10.0-514.16.1.el7.x86_64
  to  3.10.0-693.2.2.el7.x86_64 . While I was following these steps
  https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom

The instructions at https://elrepo.org/tiki/wl-kmod always worked for
me (BCM4312, if I remember correctly).

The centos wiki for broadcom is valid for EL 7.3, but needs another 
patch and another sed for EL 7.4.


The elrepo wl-kmod.srpm includes both and can build kmod-wl on your 
system for you by following the instructions at:


 http://elrepo.org/tiki/wl-kmod

Steve

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Re: [CentOS] Kernel crash

[Yves Bellefeuille]

>  I updated the kernel from 3.10.0-514.16.1.el7.x86_64
>  to  3.10.0-693.2.2.el7.x86_64 . While I was following these steps
>  https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom

The instructions at https://elrepo.org/tiki/wl-kmod always worked for
me (BCM4312, if I remember correctly).

-- 
Yves Bellefeuille


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Re: [CentOS] Kernel crash

[m . roth]

Diego Farias wrote:
> Hi everyone,
>
> I updated the kernel from 3.10.0-514.16.1.el7.x86_64
> to  3.10.0-693.2.2.el7.x86_64 . While I was following these steps
> https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom (I knew that I
> needed to compile again everything) in order to activate WIFI, the laptop
> crashed doing
>
> # depmod -a
> # modprobe wl
>
> Noting that I replaced (naively) # depmod $(uname -r) from the guide
> (stupid mistake, I use tcsh and the command above didn't work; that's why
> the replacement).
>
> After the crash, I had to manually shutdown the laptop. Then, I booted the
> same kernel and it went to 'emergency mode'; as I don't have the root
> password (second stupid mistake; I'm superuser but I don't remember the
> root password/nor I can change it -I don't know-) I couldn't do a thing.
>
> Then, I booted the previous kernel, 3.10.0-514.16.1.el7.x86_64 (which
> works
> fine), removed 3.10.0-693.2.2.el7.x86_64 (yum remove), and reinstalling it
> from zero. Oddly,
> when I boot with the new kernel, the laptop crashes before login; the caps
> lock light tilts and nothing happens. I've done this several times and the
> same.
>
> I know I can use the older kernels to work, but I really want to fix this
> if possible.
>
> Thanks in advance.

Congrats. It's nice to know other folks have the same problem I do, except
mine was on a honkin' Dell R730 server with lots of cores and memory.

Btw, folks, the normal update installs teh "with debugging" as an option;
I *assuem* that it has crash kernel enabled. However, /etc/kdump.conf is
default configured to dump to /var/crash, which has nothing at all in it.
Also - I believe I mentioned it, it kernel panics *just* as it tries to
switch root.

Diego, can you tell if you're getting a kernel panic?

   mark

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[CentOS] Kernel crash

[Diego Farias]

Hi everyone,

I updated the kernel from 3.10.0-514.16.1.el7.x86_64
to  3.10.0-693.2.2.el7.x86_64 . While I was following these steps
https://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom (I knew that I
needed to compile again everything) in order to activate WIFI, the laptop
crashed doing

# depmod -a
# modprobe wl

Noting that I replaced (naively) # depmod $(uname -r) from the guide
(stupid mistake, I use tcsh and the command above didn't work; that's why
the replacement).

After the crash, I had to manually shutdown the laptop. Then, I booted the
same kernel and it went to 'emergency mode'; as I don't have the root
password (second stupid mistake; I'm superuser but I don't remember the
root password/nor I can change it -I don't know-) I couldn't do a thing.

Then, I booted the previous kernel, 3.10.0-514.16.1.el7.x86_64 (which works
fine), removed 3.10.0-693.2.2.el7.x86_64 (yum remove), and reinstalling it
from zero. Oddly,
when I boot with the new kernel, the laptop crashes before login; the caps
lock light tilts and nothing happens. I've done this several times and the
same.

I know I can use the older kernels to work, but I really want to fix this
if possible.

Thanks in advance.
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