[FS#787] no console in Xen-DomU guests

[LEDE Bugs]

The following task has a new comment added:

FS#787 - no console in Xen-DomU guests
User who did this - Ian MacDonald (imac)

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I also experienced this.  Looking to migrate some great NFV functions from OpenWRT to LEDE. 

On 17.01.0 (59508e3) and current snapshot (a89c36b) we see this with no console:
[    5.479550] genirq: Flags mismatch irq 15. 00000000 (hvc_console) vs. 00000000 (pata_legacy.1)
[    5.479656] hvc_open: request_irq failed with rc -16.

Unfortunately 17.01.2 does not have domu extensions resulting in
xc: error: elf_xen_note_check: ERROR: Will only load images built for the generic loader or Linux images (Not  and ): Invalid kernel

The best I can come up with will be to manually mount the images and pre-config to get them online.  Trying to avoid any more older CC15.05 builds.  



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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=787#comment2947