I see you've also reported a bug at <https://bugzilla.kernel.org/show_bug.cgi?id=38682>. Based on the answer to that, I think that your Debian bug reports #632064 and #632231 are related to a single bug in the dell-laptop driver.
Ben. -- Ben Hutchings Absolutum obsoletum. (If it works, it's out of date.) - Stafford Beer
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