In https://launchpad.net/ubuntu/+source/initramfs-tools/0.133ubuntu3 in
eoan+ manual chzdev -e got added to activate qeth devices, if they have
been specified in the ip= command, i.e. if enc300 is the device in the
ip= command.
This has not been backported to bionic.
To boot without specifying the device name, i.e. with just mac address
one will need automatic chzdev device configuration via
/sys/firmware/sclp_sd/config/data that was added in s390-tools v2.5.0
fist available in cosmic+
but that also needs kernel support for sclp_sd driver to exist, i.e
first added in v4.16.
Thus if one wants this support one will need to backport
1) initramfs-tools changes
2) s390-tools changes
3) linux sclp_sd driver from linux-hwe to GA
** Also affects: initramfs-tools (Ubuntu)
Importance: Undecided
Status: New
** Also affects: s390-tools (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- Unable to boot Ubuntu 18.04 and older on an IBM Z DPM Partition
+ Unable to netboot Ubuntu 18.04 and older on an IBM Z DPM Partition - no
manual nor automatic qeth device configuration
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https://bugs.launchpad.net/bugs/1918970
Title:
Unable to netboot Ubuntu 18.04 and older on an IBM Z DPM Partition -
no manual nor automatic qeth device configuration
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