Bug 195116 - Display brightness control/resuming require acpi_video to be loaded after i915kms
Summary: Display brightness control/resuming require acpi_video to be loaded after i91...
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: CURRENT
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-acpi mailing list
URL:
Keywords: i915
Depends on:
Blocks:
 
Reported: 2014-11-17 17:52 UTC by Lutz Bichler
Modified: 2015-03-12 04:20 UTC (History)
0 users

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Description Lutz Bichler 2014-11-17 17:52:18 UTC
On an Asus UX31A (Ivybridge) it is required to load the acpi_video module after the i915kms module to be able to control the brightness (hw.acpi.video.lcd0.brightness) or to successfully resume the machine. 

Therefore, it is not possible to directly load the acpi_video module at startup
(especially because loading the i915kms module from loader.conf leads to a black screen on this machine).