Date: Wed, 17 Nov 2004 13:29:01 -0800 From: "Kevin Oberman" <oberman@es.net> To: Brad Karp <bkarp+@cs.cmu.edu> Cc: mobile@freebsd.org Subject: Re: acpi_video, 5.3-RELEASE, ThinkPad X31? Message-ID: <20041117212901.456935D04@ptavv.es.net> In-Reply-To: Your message of "Wed, 17 Nov 2004 15:08:15 EST." <20041117200832.9326743D1F@mx1.FreeBSD.org>
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> From: Brad Karp <bkarp+@cs.cmu.edu> > Date: Wed, 17 Nov 2004 15:08:15 -0500 > Sender: owner-freebsd-mobile@freebsd.org > > Greetings, all. > > I run 5.3-RELEASE on a ThinkPad X31. Using ACPI, with acpi_video loaded at > boot time (as verified by kldstat), I find no dmesg output for the acpi_video > driver; it would seem the driver cannot attach on the X31. > > I believe I need acpi_video so that my backlight turns off when I suspend; at > present, when I transition to state S3, the machine suspends successfully (no > disk noise; "moon" icon illuminated), and while the image on the display is > blanked, the power-hungry backlight remains on. > > Has anyone with an X31 (or other ThinkPad) found a fix or workaround? On my T30 I needed to add jhb's acpi_video_dpms patch and put: hw.acpi.reset_video=0 hw.syscons.no_suspend_vtyswitch=1 hw.pci.do_powerstate=1 into /etc/sysctl.conf That is the only way I found to get the backlight to turn off. (I do have acpi_video loaded, but it only seems to report on the video. I can't sert anything.) -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634
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