** Also affects: linux (Ubuntu Yakkety)
Importance: High
Status: Confirmed
** Changed in: linux (Ubuntu Yakkety)
Status: Confirmed => Fix Committed
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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
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Yakkety:
Fix Committed
Bug description:
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.
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