https://bugzilla.novell.com/show_bug.cgi?id=798254 https://bugzilla.novell.com/show_bug.cgi?id=798254#c0 Summary: vgaswitcheroo broken on Tumbleweed update to Linux Kernel 3.7.1-17-desktop January 9th 2013 Classification: openSUSE Product: openSUSE 12.2 Version: Final Platform: x86-64 OS/Version: openSUSE 12.2 Status: NEW Severity: Normal Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: trent.hawkins83@gmail.com QAContact: qa-bugs@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Firefox/17.0 Just zypper dupped to Linux Kernel: 3.7.1-17-desktop. Running openSUSE 12.2 Tumbleweed. Tried my usual trick of running vgaswitcheroo to turn off my second graphics card (hybrid graphics i915 + AMD Radeon HD 6400M), but it didn't work. This is the usual command: # echo OFF > /sys/kernel/debug/vgaswitcheroo/switch System Monitor plasma widget gives me a temperature reading that would normally indicate the AMD card has been switched off (-127.9DegC), but the fan is still going hard and my power usage is half what it should be - powertop says power consumption is 25W, usually 10-13W with AMD card off. Running # grep -i switcheroo /boot/config-* Gives me: CONFIG_VGA_SWITCHEROO=y So the kernel has been properly compiled with this option. Note that output of: # cat /sys/kernel/debug/vgaswitcheroo/switch 0:IGD:+:Pwr:0000:00:02.0 1:DIS: :Off:0000:01:00.0 Indicates that the Discrete (AMD) card is actually off, but this is not the case. Reproducible: Always Steps to Reproduce: 1. Open terminal 2. Enter echo OFF > /sys/kernel/debug/vgaswitcheroo/switch Actual Results: Nothing happens. Expected Results: Should hear Discrete graphics card fan turn off and experience doubling in battery performance. # lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Caicos [Radeon HD 6400M/7400M Series] Also note I have found an old Arch bug report that may be related: https://bbs.archlinux.org/viewtopic.php?pid=1122998 -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.