I would add DMI entries to force vendor backlight for my system, but I'd really prefer they are not remain in memory forever. Is there any reason for the whole detection to not happen exactly once? After all, ACPI cannot change after boot, can it? Hmm ... actually DSDT can be loaded from initrd, so it can change ... but in this case we actually are just interested in DMI matching which says whether vendor driver is preferred or not. What would be the the best place to call it from? -andrey
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