http://ibm-acpi.sourceforge.net/README This document has describe how to use /proc/acpi/ibm/video: ------------------------------------------------------ Video output control -- /proc/acpi/ibm/video -------------------------------------------- This feature allows control over the devices used for video output - LCD, CRT or DVI (if available). The following commands are available: echo lcd_enable > /proc/acpi/ibm/video echo lcd_disable > /proc/acpi/ibm/video echo crt_enable > /proc/acpi/ibm/video echo crt_disable > /proc/acpi/ibm/video echo dvi_enable > /proc/acpi/ibm/video echo dvi_disable > /proc/acpi/ibm/video echo auto_enable > /proc/acpi/ibm/video echo auto_disable > /proc/acpi/ibm/video echo expand_toggle > /proc/acpi/ibm/video echo video_switch > /proc/acpi/ibm/video ---------------------------------------------------------------- These commands also cause my computer dead. Is there i915 driver problem ? I has these error info in dmesg: [ 4.847462] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [ 4.847559] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* pipe B underrun [ 4.847640] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun 在 2019/9/25 下午11:42, Debian Bug Tracking System 写道: > This is an automatic notification regarding your Bug report > which was filed against the src:linux package: > > #941115: linux-image-4.19.0-6-686: cat /proc/acpi/ibm/video ,computer dead !thinkpad_acpi bug? > > It has been closed by Ben Hutchings <ben@decadent.org.uk>. > > Their explanation is attached below along with your original report. > If this explanation is unsatisfactory and you have not received a > better one in a separate message then please contact Ben Hutchings <ben@decadent.org.uk> by > replying to this email. > > -- 肖盛文 Faris Xiao
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