https://bugzilla.kernel.org/show_bug.cgi?id=42696
Summary: Wrong ACPI handle is being detected for NVIDIA graphics card on Lenovo Ideapad Y470/Y570 Product: ACPI Version: 2.5 Kernel Version: 3.3-rc1 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: BIOS AssignedTo: acpi_b...@kernel-bugs.osdl.org ReportedBy: lekenst...@gmail.com Regression: No On the Lenovo Ideapad Y470 and Lenovo Ideapad Y570, the kernel assigns the \_SB.PCI0.PEG0.VGA handle to the PCI device (possibly because the _DOS method is found on the handle?) However, the correct _DSM, _ROM, _PS0 and _PS3 can be found on the \_SB.PCI0.PEG0.PEGP handle. _PSx on the VGA handle is basically a no-op, it only gets/sets the _PSC variable. _ROM does not exist and the _DSM method is not useful comparing it to the PEGP._DSM method. Due to this issue, the nouveau driver fails to load the vbios (because _ROM does not exist on VGA). Similarly, the proprietary nvidia driver fails to load. As for the _PS0 and _PS0 methods, using the pci_set_power_state methods does not really disable the PCI device. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla