bug#44054: [1.2 installer]: Kernel panic when attempting to reboot after install.

bug#44054: [1.2 installer]: Kernel panic when attempting to reboot after install.

[Brendan Tildesley]

I generated an installer for myself from 
5d4ad8e1be6d60c38577e2f3d92cc5642b12eff0 + Miguel's patch (I think 
unrelated to this bug) here https://paste.debian.net/plain/1167398

After the install completed I pulled out the USB as per instruction on 
the screen, and pressed the Reboot button. The system then Kernel panic 
with the following messages:

https://brendan.scot/p/IMG_20201018_140343.png

Sorry I don't have it in textual form.

bug#44054: [1.2 installer]: Kernel panic when attempting to reboot after install.

[Mathieu Othacehe]

Hello Brendan,

> After the install completed I pulled out the USB as per instruction on the
> screen, and pressed the Reboot button. The system then Kernel panic with the
> following messages:
>
> https://brendan.scot/p/IMG_20201018_140343.png
>
> Sorry I don't have it in textual form.

Is the installed system functional? The kernel panic may come from the
fact that the installation support was removed while still needed.

In that case, we could stop advising users to remove the installation
device before rebooting.

Thanks,

Mathieu

bug#44054: [1.2 installer]: Kernel panic when attempting to reboot after install.

[Brendan Tildesley]

On 19/10/20 5:16 am, Mathieu Othacehe wrote:
> Hello Brendan,
>
>> After the install completed I pulled out the USB as per instruction on the
>> screen, and pressed the Reboot button. The system then Kernel panic with the
>> following messages:
>>
>> https://brendan.scot/p/IMG_20201018_140343.png
>>
>> Sorry I don't have it in textual form.
> Is the installed system functional? The kernel panic may come from the
> fact that the installation support was removed while still needed.
Yes the system was functional. From memory, other distro installers 
recommend removing
the device and rebooting too. So its curious that Guix somehow has an 
issue with it.
Although this is only one data point. I'd like other people to test it 
to be sure.

bug#44054: [1.2 installer]: Kernel panic when attempting to reboot after install.

[Ludovic Courtès]

Hi,

Brendan Tildesley <mail@brendan.scot> skribis:

> On 19/10/20 5:16 am, Mathieu Othacehe wrote:
>> Hello Brendan,
>>
>>> After the install completed I pulled out the USB as per instruction on the
>>> screen, and pressed the Reboot button. The system then Kernel panic with the
>>> following messages:
>>>
>>> https://brendan.scot/p/IMG_20201018_140343.png

This panic says that PID 1 was terminated by signal 7 (SIGBUS), which is
a bit alarming.

>>> Sorry I don't have it in textual form.
>> Is the installed system functional? The kernel panic may come from the
>> fact that the installation support was removed while still needed.
> Yes the system was functional. From memory, other distro installers
> recommend removing
> the device and rebooting too. So its curious that Guix somehow has an
> issue with it.

Did you remove the device right after the “installation complete”
message?

Mathieu, are there other file system operations happening beyond that?

Thanks,
Ludo’.

bug#44054: [1.2 installer]: Kernel panic when attempting to reboot after install.

[Tobias Geerinckx-Rice via Bug reports for GNU Guix]

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Brendan,

Brendan Tildesley 写道：
> From memory, other distro installers recommend removing
> the device and rebooting too. So its curious that Guix
> somehow has an issue with it.

Not really: you're ripping out the root file system while the full 
system is happily running, then initiating a graceful shutdown 
sequence that's going to try to read from disc.  No distro will 
survive that.

Some bad installers pretend to.  After all: the persistent target 
device is safely unmounted; let's quietly hard-reset the system!

What I've seen the better ones do is display the ‘plz remove USB’ 
message very late in the shutdown sequence, when it's actually 
safe to do so.

Kind regards,

T G-R

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bug#44054: [1.2 installer]: Kernel panic when attempting to reboot after install.

[Mathieu Othacehe]

Hey,

> Mathieu, are there other file system operations happening beyond that?

The final "sync" call is done just after the user clicks on "Reboot", so
if the flash drive is removed before clicking on "Reboot" I guess things
can go wrong.

I'll see if I can reproduce this issue.

Thanks,

Mathieu