[Bug 62541] Kernel oops/panic during system boot with systemd - "Unable to handle kernel NULL pointer dereference"

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https://bugzilla.kernel.org/show_bug.cgi?id=62541

--- Comment #1 from Adrian Byszuk <a.byszuk@xxxxxxxxxxxxxx> ---
OK, I was able to track down the problem more precisely.

In my rc.local I have:
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

for switching discrete graphics after boot. With this line booting fails.
But when I change it to:
sleep 5
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

kernel is booting just fine.

So I think the problem is that systemd is, unlike the old init, executing
rc.local just in the beginning which switches discrete graphics just in the
beginning of system startup.

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