https://bugzilla.kernel.org/show_bug.cgi?id=45151
Summary: [REGRESSION] [BISECTED] ACPI event stop to be detected Product: ACPI Version: 2.5 Kernel Version: 2.6.39 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ACPICA-Core AssignedTo: acpi_acpica-c...@kernel-bugs.osdl.org ReportedBy: trent...@dei.unipd.it Regression: Yes This report follow ubuntu bug from here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/908825 This is the resume of the launchpad report and the suspected problem: I've a Clevo M720 notebook rebranded as Santech T45. All kernel from 2.6.38 and before support my laptop hotkey without extra set up. From 2.6.39 and following acpi support is broken. For example, with newer kernel, there are not recognized event like: - the ac_adapter plug and unplug - changing battery charging/discharging status event - suspend button* - backlight hotkey event* - low power mode button* - lid open/close The bug is reproducible booting the laptop with a kernel from 2.6.38 and older and affect all most diffused distribution (debian, fedora, ubuntu, etc.) when using newer kernel. Using acpi_event command I've saved the output for low power mode button, backlight up and down and suspend button: #: acpi_listen processor CPU0 00000080 00000003 processor CPU0 00000081 00000000 processor CPU1 00000080 00000003 processor CPU1 00000081 00000000 processor CPU0 00000080 00000000 processor CPU0 00000081 00000000 processor CPU1 00000080 00000000 processor CPU1 00000081 00000000 video LCD 00000087 00000000 video LCD 00000086 00000000 button/sleep SLPB 00000080 00000002 After kernel bisection, I've found the first commit that have caused the regression: 6dfad339645247c9deb553e4d68e21211ddc61bd is the first bad commit commit 6dfad339645247c9deb553e4d68e21211ddc61bd Author: Lin Ming <email address hidden> Date: Mon Feb 14 15:29:34 2011 +0800 ACPICA: GPE detect optimization - ignore unused GPE registers This optimization will simply ignore GPE registers that contain no enabled GPEs - there is no need to read the register. ACPICA bugzilla 884. http://www.acpica.org/bugzilla/show_bug.cgi?id=884 Signed-off-by: Lin Ming <email address hidden> Signed-off-by: Bob Moore <email address hidden> Signed-off-by: Len Brown <email address hidden> :040000 040000 8c25abddf22c9740402624bd582f3c87bfe9fc4f e40ed2fa28b82990cc8fb147f61841fd6400e711 M drivers -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla