Is it now a znetconf issue or still a kernel issue? Can you manually enable the device by directly echo-ing to the sysfs entry? (I guess the device is not in the cio ignore list or so.) Did you also tried chzdev to enable it? (ideally with '--verbose') (I was once told that this is the strategic tool to enable ccw devices, and since then I use this all the time).
Well, there are hundreds of patches that regularly find it's way into the focal kernel, since we continuously pick up almost everything that comes as upstream stable update. These are handled by tickets like these: ... Focal update: v5.4.89 upstream stable release - LP 1913486 Focal update: v5.4.90 upstream stable release - LP 1913487 Focal update: v5.4.91 upstream stable release - LP 1914654 ... There are of course some commits (just as an example, like: "s390/cio: fix use-after-free in ccw_device_destroy_console" introduced with Focal update: v5.4.86 upstream stable release (LP: #1910822)) that could have an impact. But it's difficult to figure that out, since between the kernel you've used (5.4.0-58) and the sample build (5.4.0-66) from above, quite a lot came in. So I went back in history (aka git log) to 5.4.0-58.64 / 6e9188016357 and patched that version with the same backport and did another test build. You can now find kernel files with version 5.4.0-58 (in addition to 5.4.0-66) here: https://people.canonical.com/~fheimes/lp1913442/ that are worth to retry, I think. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1913442 Title: [Ubuntu 20.04] Problem leading IUCV service down (on s390x) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1913442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
