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Re: Bug#864536: missing kernel modules in D-I sd-card images

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Hey debian-kernel,

Karsten Merker <merker@debian.org> (2017-06-11):
> as we appear to have the same underlying problem in bugs 864536,
> 864457 and 856111, I personally think that adding the modules
> necessary for i2c-support in d-i is worth another upload before
> r0, provided the current diagnosis in 864457 is correct and
> handling the additional work due to this is doable for everybody
> involved.
> 
> If the current diagnosis in 864457 is correct, not providing i2c
> modules AFAICS will not only break d-i completely on the
> Firefly-RK3288 (bug 864536) but also the following usecases:
> 
> - all hd-media and thereby all offline installs
> - all installations to USB-connected harddisks
> - all non-serial-console installations due to non-working
>   USB keyboard support
> 
> on all systems that use the AXP20x series of powermanagement
> controllers, which is a significant part of the armhf platforms
> that we provide installer images for:
> 
> - A10-OLinuXino-Lime
> - A20-OLinuXino-Lime
> - A20-OLinuXino-Lime2
> - A20-OLinuXino-MICRO
> - A20-Olimex-SOM-EVB
> - BananaPi
> - BananaPro
> - Cubieboard
> - Cubieboard2
> - Cubietruck
> - Lamobo_R1
> - orangepi_plus
> - pcDuino
> - pcDuino3
> 
> AIUI, the following changes to the kernel package would be
> needed:
> 
> - add an i2c-modules config for armhf which includes the generic
>   i2c-modules config plus the i2c-mv64xxx and i2c-rk3x modules 
> - add the axp20x_usb_power module to the armhf kernel-image config
>   to address the specifics of bug #856111 (see Ben Hutchings' notes
>   at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856111#54)
> 
> As that effectively only makes the same modules that we already
> install on all armhf systems also available inside the d-i
> environment, the chances of causing a regression by this change
> are rather low.  Size constraints are AFAIK not a problem on
> armhf (in contrast to armel), so the aforementioned changes
> should be rather low-risk.

Based on Karsten's input, I'm now rather convinced that adding a udeb
before r0 would be the best way to deal with it. Even if some other
modules are missing inside, we still have a chance of fixing this in a
point release by just adding a few .ko files to an already existing
udeb, instead of introducing it during a point release.

I've just checked with Niels, and this looks like a sane approach from a
release team point of view.

Do you know if you'll be able to perform a new linux upload from the
stretch branch in a relatively near future? The sooner we get fixes, the
more we can run tests, and the saner release people will be. ;)

Please let me know if I can help.


KiBi.

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Bug#864536: missing kernel modules in D-I sd-card images Cyril Brulebois <kibi@debian.org> - 2017-06-11 02:30 +0200
  Bug#864457: Bug#864536: missing kernel modules in D-I sd-card images Karsten Merker <merker@debian.org> - 2017-06-11 10:40 +0200
    Re: Bug#864536: missing kernel modules in D-I sd-card images Cyril Brulebois <kibi@debian.org> - 2017-06-11 17:20 +0200
    Bug#856111: Bug#864457: Bug#864536: missing kernel modules in D-I sd-card images Karsten Merker <merker@debian.org> - 2017-06-11 17:40 +0200
      Processed: Re: Bug#864457: Bug#864536: missing kernel modules in  D-I sd-card images owner@bugs.debian.org (Debian Bug Tracking System) - 2017-06-11 17:40 +0200
      Processed: Re: Bug#864457: Bug#864536: missing kernel modules in  D-I sd-card images owner@bugs.debian.org (Debian Bug Tracking System) - 2017-06-11 17:40 +0200
      Processed: Re: Bug#864457: Bug#864536: missing kernel modules in  D-I sd-card images owner@bugs.debian.org (Debian Bug Tracking System) - 2017-06-11 17:40 +0200
      Bug#856111: Bug#864457: Bug#864536: missing kernel modules in D-I sd-card images Cyril Brulebois <kibi@debian.org> - 2017-06-14 09:40 +0200
        Re: Bug#864457: Bug#864536: missing kernel modules in D-I sd-card  images Karsten Merker <merker@debian.org> - 2017-06-14 22:30 +0200
          Re: Bug#864457: Bug#864536: missing kernel modules in D-I sd-card  images Cyril Brulebois <kibi@debian.org> - 2017-06-15 10:40 +0200

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