Bug#825026: linux-image-4.5.0-2-armmp-lpae: heartbeat triggered LEDs don't come up by default
Package: src:linux
Version: 4.5.3-2
Severity: normal
Hi,
My ODROID XU4 has a blue LED on it, which, after # has been fixed,
is supposed to be a heartbeat LED, being solid-on during the bootloader
and then flashing when the OS is active. (The manual says so, and
“heartbeat” is the default mapping in the device tree for XU4.)
However, Debian's kernel ships with CONFIG_LEDS_TRIGGER_HEARTBEAT=m,
which means this function doesn't work out of the box. As a workaround,
you can load the module manually (or put it in /etc/modules). I don't know of a
way to have the device tree signal to the kernel that a given module should be
loaded (and I don't know how that would interact with initramfs), but I haven't
looked too deeply. However, it should probably come up as soon as possible to
check that the bootloader actually managed to boot the kernel, and it's not
big (the .ko is ~9 kB), so it's probably best to just build it into the kernel,
which is also what the Kconfig help text says.
On a quick grep, it seems most of these LEDs in the device trees are mapped
to either cpu*, mmc, default-on or heartbeat. CPU is already built in
and MMC logically gets loaded along with the device, but always-on and
heartbeat are built as modules.
So my guess would be that the kernel should have these changes:
CONFIG_LEDS_TRIGGER_HEARTBEAT=y
CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
-- System Information:
Debian Release: stretch/sid
APT prefers testing
APT policy: (500, 'testing'), (1, 'experimental')
Architecture: armhf (armv7l)
Kernel: Linux 4.6.0 (SMP w/8 CPU cores)
Locale: LANG=en_DK.UTF-8, LC_CTYPE=en_DK.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages linux-image-4.5.0-2-armmp-lpae depends on:
ii debconf [debconf-2.0] 1.5.59
ii initramfs-tools [linux-initramfs-tool] 0.125
ii kmod 22-1.1
ii linux-base 4.0
Versions of packages linux-image-4.5.0-2-armmp-lpae recommends:
ii firmware-linux-free 3.4
ii irqbalance 1.1.0-2
Versions of packages linux-image-4.5.0-2-armmp-lpae suggests:
pn debian-kernel-handbook <none>
pn fdutils <none>
pn linux-doc-4.5 <none>
Versions of packages linux-image-4.5.0-2-armmp-lpae is related to:
pn firmware-amd-graphics <none>
pn firmware-atheros <none>
pn firmware-bnx2 <none>
pn firmware-bnx2x <none>
pn firmware-brcm80211 <none>
pn firmware-cavium <none>
pn firmware-intel-sound <none>
pn firmware-intelwimax <none>
pn firmware-ipw2x00 <none>
pn firmware-ivtv <none>
pn firmware-iwlwifi <none>
pn firmware-libertas <none>
pn firmware-linux-nonfree <none>
pn firmware-misc-nonfree <none>
pn firmware-myricom <none>
pn firmware-netxen <none>
pn firmware-qlogic <none>
pn firmware-realtek <none>
pn firmware-samsung <none>
pn firmware-siano <none>
pn firmware-ti-connectivity <none>
pn xen-hypervisor <none>
-- no debconf information
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