Public bug reported:
The 4.6.0-11.13 kernel currently in the ckt ppa fails to boot on X-Gene
systems, such as the Mustang board. Even with earlycon enabled, there is
no output from the kernel on the console (see the attached console log).
The same kernel boots fine on other arm64 systems - this appears to be
X-Gene specific.
A defconfig build boots fine on the same system - so I bisected down the
relevant config change. The results were unexpected, but
CONFIG_ARCH_ROCKCHIP=y appears to be required for X-Gene to boot.
Digging down deeper, I found that the following 2 specific configs are
required (I had to do hack Kconfigs to make them selectable independent
of CONFIG_ARCH_ROCKCHIP):
CONFIG_PINCTRL_ROCKCHIP=y
CONFIG_ROCKCHIP_TIMER=y
Both of which are drivers that do not bind to devices on X-Gene.
** Affects: linux (Ubuntu)
Importance: High
Status: Confirmed
** Attachment added: "console.log"
https://bugs.launchpad.net/bugs/1616672/+attachment/4727305/+files/console.log
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https://bugs.launchpad.net/bugs/1616672
Title:
4.6.0-11.13 from ckt PPA fails to boot on X-Gene
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