https://bugzilla.novell.com/show_bug.cgi?id=767931 https://bugzilla.novell.com/show_bug.cgi?id=767931#c0 Summary: System hang when switching off NVD9 on linux 3.4 Classification: openSUSE Product: openSUSE 12.2 Version: Factory Platform: x86-64 OS/Version: Other Status: NEW Severity: Major Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: srid@rkmail.ru QAContact: qa-bugs@suse.de Found By: --- Blocker: --- User-Agent: Opera/9.80 (X11; Linux x86_64; U; ru) Presto/2.10.229 Version/11.64 I'm using Asus u30sd notebook with infamous nvidia optimus graphics. (geforce 520M aka NVD9) In kernel 3.3 for nvd9 was added support for switching it off via debugfs (/sys/kernel/debug/vgaswitcheroo/switch). It is a cool feature, it saved me hours of battery power, but it seems that in linux 3.4 it's broken. I have 'echo OFF > /sys/kernel/debug/vgaswitcheroo/switch' line in my /etc/init.d/boot.local to poweroff nvidia controller on boot. On cold start with kernel 3.4 the screen goes dark when kdm greeting is supposed to appear, and computer does not respond to any keys. If I am rebooting machine with already disabled nvidia graphics (for example, booting to 3.3 and switching off secondary card from there) the boot process stops just after line 'VGA switcheroo: switched nouveau off' appears on the screen. System boots normally without 'echo OFF > /sys/kernel/debug/vgaswitcheroo/switch' in /etc/init.d/boot.local Reproducible: Always Steps to Reproduce: 1. 2. 3. My lspci: lspci 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) 00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5) 00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b5) 00:1d.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) 01:00.0 VGA compatible controller: nVidia Corporation GF119 [GeForce GT 520M] (rev ff) 03:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01) 04:00.0 Ethernet controller: Atheros Communications AR8151 v2.0 Gigabit Ethernet (rev c0) -- 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.