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Add a note about rcu_sched problems

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How I fixed my XPS15 after it being dead for two months
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Ben Ford
2018-07-13 09:47:48 +01:00
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dell/xps/15-9550/README.wiki
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@@ -36,3 +36,17 @@ These settings are needed both for booting the final install, and installer itse
* ''Update BIOS.'' According to Reddit, this helps with battery life.
* ''Update Intel's Thunderbolt firmware.'' Without this, the Thunderbolt port will only work as power source, and not transfer data.
=== Troubleshooting ===
==== rcu_sched freezing problems ====
After a recent update my machine became unstable. X couldn't start and even running `lspci` would lock the machine. I'm not sure what the root cause was, but I found the fix here: https://wiki.archlinux.org/index.php/Dell_XPS_15_9560#Troubleshooting
TL;DR I added this line:
```
boot.kernelParams = [ "acpi_rev_override=1" "pcie_aspm=off" "nouveau.modeset=0" ];
```