Distribution: Debian woody with custom kernel Hardware Environment: Sony PCG-FX602 laptop (Mobile AMD Duron) Software Environment: Problem Description: Switching to external VGA display or TV-out freezes the kernel. Also turning the laptop off does not power off though the message acpi_power_off is displayed. Both problems seem to be related to the ACPI code and were introduced in the ACPI code on sourceforge somewhere between acpi-20021212-2.4.20.diff.gz and acpi-20031203-2.4.24.diff.bz2. Kernel 2.4.20+acpi-20021212 does not have these bugs but kernel-2.4.24+acpi-20031203 does. The bug shows in vanilla kernel 2.6.1 and also 2.6.1+acpi-20031203 from acpi.sourceforge.net. Steps to reproduce: At any time press Fn-F7 (swith to external VGA) or Fn-F8 (switch to TV-out) to freeze the laptop.
Created attachment 1873 [details] Output of dmesg
Created attachment 1874 [details] Output of dmidecode
Created attachment 1875 [details] Output of acpidmp
The same thing happens with ASUS M2N series. Interestingly, it only happens when APIC is enabled, if local APIC is disabled, the machine does not crash. Can you reproduce that?
Indeed, the bug does not show if local APIC is disabled.
please try 2.6.2 which has a local APIC fix based on the fix in bug 1269 I'm curious what software handles the Fn+F7 and Fn+F8 events -- not immediately clear from your DSDT that ACPI is involved in handling these events.
I couldn't check, as I was unable to boot 2.6.2 or 2.6.2-mm1 with ACPI & APIC enabled. (see http://bugzilla.kernel.org/show_bug.cgi?id=1269)
please re-test with 2.6.10-rc2 or newer.
Please re-open if still an issue with linux-2.6.10 or later.