How i can downgrade kernal to latest stable?

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How i can downgrade kernal to latest stable?

Postby Nasreldin » 2017-11-01 01:32

I'm new Linux user and i love Debian mate very much but when i made software update i installed new kernel and i have some problem and i want to make kernel downgrade to latest stable ?
how i can do this in details please?
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Re: How i can downgrade kernal to latest stable?

Postby stevepusser » 2017-11-01 02:03

You need to provide more information. Which new kernel did you install? (give the terminal output of "uname -r")

When you install a newer kernel, it does not remove your older kernel version. You have to do that manually. Did you do that?
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Re: How i can downgrade kernal to latest stable?

Postby Nasreldin » 2017-11-01 02:33

no i used synaptic update
my output is: 4.9.0-4-amd64
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Re: How i can downgrade kernal to latest stable?

Postby roseway » 2017-11-01 06:03

One small point to note here: the command uname -r only gives you the version number of the kernel package, not the actual kernel version. To get the actual kernel version, type:
Code: Select all
apt-cache policy linux-image-4.9.0-4

linux-image-4.9.0-4 is the current kernel package in Stable, the actual kernel version is 4.9.51.
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Re: How i can downgrade kernal to latest stable?

Postby Head_on_a_Stick » 2017-11-01 06:22

If you want to run an older kernel version the select it from the "Advanced Options" GRUB submenu for the Debian entry — this will only appear if Debian is "controlling" the bootloader, you can boot from the symlink at /vmlinuz-old otherwise.

What exactly is the problem with the new kernel version?

Regressions in Debian stable are very rare.
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Re: How i can downgrade kernal to latest stable?

Postby Nasreldin » 2017-11-01 08:11

the error is showing message: wait hw ready failed debian
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Re: How i can downgrade kernal to latest stable?

Postby Nasreldin » 2017-11-01 08:14

linux-image-4.9.0-4-rt-amd64:
Installed: (none)
Candidate: 4.9.51-1
Version table:
4.9.51-1 500
500 http://ftp.fr.debian.org/debian stretch/main amd64 Packages
linux-image-4.9.0-4-amd64:
Installed: 4.9.51-1
Candidate: 4.9.51-1
Version table:
*** 4.9.51-1 500
500 http://ftp.fr.debian.org/debian stretch/main amd64 Packages
100 /var/lib/dpkg/status
linux-image-4.9.0-4-amd64-dbg:
Installed: (none)
Candidate: 4.9.51-1
Version table:
4.9.51-1 500
500 http://ftp.fr.debian.org/debian stretch/main amd64 Packages
linux-image-4.9.0-4-rt-amd64-dbg:
Installed: (none)
Candidate: 4.9.51-1
Version table:
4.9.51-1 500
500 http://ftp.fr.debian.org/debian stretch/main amd64 Packages
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Re: How i can downgrade kernal to latest stable?

Postby roseway » 2017-11-01 17:43

So you have the latest stable, which is what you said you want to downgrade to.
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Re: How i can downgrade kernal to latest stable?

Postby stevepusser » 2017-11-01 19:59

I just wanted to see what kind of kernel upgrade he was talking about, Debian or some third-party one. "uname -a" will provide more information about the specific kernel version.

So it was a security upgrade of the standard Debian kernel that you mean. The older, vunerable version you wanted to revert to is no longer in the standard repositories. This is more an XY problem, too.
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Re: How i can downgrade kernal to latest stable?

Postby debiman » 2017-11-02 06:02

Nasreldin wrote:i have some problem

so now you see that the kernel is not the problem.
what is?
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Re: How i can downgrade kernal to latest stable?

Postby p.H » 2017-11-02 08:03

stevepusser wrote:So it was a security upgrade of the standard Debian kernel that you mean. The older, vunerable version you wanted to revert to is no longer in the standard repositories.

AFAIK, linux 4.9.0-4/4.9.51-1 is not a security update but was part of the recent 9.2 point release update (with ABI change -3 to -4).
https://www.debian.org/News/2017/20171007
The latest (and earlier) linux security update was 4.9.0-3/4.9.30-2+deb9u5
https://www.debian.org/security/2017/dsa-3981
https://packages.debian.org/stretch/linux-image-4.9.0-3-amd64
AFAICS on the Debian site, it is still available (until the next linux security update).
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Re: How i can downgrade kernal to latest stable?

Postby stevepusser » 2017-11-02 19:30

p.H wrote:
stevepusser wrote:So it was a security upgrade of the standard Debian kernel that you mean. The older, vunerable version you wanted to revert to is no longer in the standard repositories.

AFAIK, linux 4.9.0-4/4.9.51-1 is not a security update but was part of the recent 9.2 point release update (with ABI change -3 to -4).
https://www.debian.org/News/2017/20171007
The latest (and earlier) linux security update was 4.9.0-3/4.9.30-2+deb9u5
https://www.debian.org/security/2017/dsa-3981
https://packages.debian.org/stretch/linux-image-4.9.0-3-amd64
AFAICS on the Debian site, it is still available (until the next linux security update).


But I don't see 4.9.0-3 available in the output of kernels from apt policy above, unless the OP truncated it without letting us know. And of course we don't see exactly what package they are checking, either.
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Re: How i can downgrade kernal to latest stable?

Postby debiman » 2017-11-03 05:10

before it drowns in noise, i'll repeat one more time:
op just thinks that the kernel is the problem. but since they're already using the standard stretch kernel, it's fair to assume that the real problem is something else.
op needs to tell us about the real problem.
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Re: How i can downgrade kernal to latest stable?

Postby p.H » 2017-11-03 07:21

This topic is about downgrading the kernel, not solving the real problem. If the OP wanted us to help solve the real problem, they would have described it instead of asking how to downgrade the kernel.

The OP has the latest stable kernel, which was released very recently and contains an ABI change. So, although it was a stable update, it is reasonable to consider that the problem, whatever it is, may be caused by a regression in the new kernel.

Note to the OP : unless you autoremoved unneeded packages or manually removed the old kernel after the upgrade, the old kernel is still installed and you can select it int the "Advanced options" submenu from the GRUB menu.
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Re: How i can downgrade kernal to latest stable?

Postby alan stone » 2017-11-03 07:23

Nasreldin wrote:i have some problem

Image :roll:
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