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Date: Fri, 16 Oct 2009 23:46:31 +0100 From: Nélson «VuDu» Cunha <vudu.curse@...il.com> To: linux-kernel@...r.kernel.org Subject: [kernel 2.6.31.4] backlight controls gone mad Hello, I'm using ArchLinux (here's the "downstream" bug report: http://bugs.archlinux.org/task/16698) and with the last update to kernel 2.6.31.4 my backlight/brightness controls have gone mad. My laptop's screen keeps blinking, slowly increasing or decreasing its luminosity randomly. Sometimes it stays still for a couple of minutes at any random brightness level, but it's very uncomfortable for the eyes when it's blinking. Here's a video of what's happening: http://www.mediafire.com/download.php?z4mi4uzidjn I've tried to use /proc/acpi/video/VGA/LCDD/brightness and /sys/class/backlight/acpi_video0/brightness but with no luck, because they make no changes and when I cat them I get wrong values. I tried using xbacklight but it gives me "No outputs have backlight property". With the previous (2.6.30.6) version I had no problems and after getting this problem I installed Arch's "kernel26-lts" package (2.6.27.37) and I'm having no issues with that kernel. My laptop is an ASUS M51VA with an Intel C2D and an ATI HD 3650. I tried fglrx, radeon and radeonhd and it made no difference. If you need more details, please say so. Best Regards. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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