Hi again, Jonathan Nieder wrote: > The bug snuck back in in commit 33620c5419e8 (ACPICA: Support for > custom ACPICA build for ACPI 5 reduced hardware, 2012-02-14), > presumably by copy/pasting from the wrong source for the legacy case. Um, wrong commit. Sorry, here's a fixed message. ACPI: Leave Bus Master Arbitration enabled for suspend/resume This is an old suspend/resume lockup fix: commit 2780cc4660e1 Author: Len Brown <len.brown@xxxxxxxxx> Date: Thu Dec 23 13:43:30 2004 -0500 [ACPI] Fix suspend/resume lockup issue by leaving Bus Master Arbitration enabled. The ACPI spec mandates it be disabled only for C3. http://bugzilla.kernel.org/show_bug.cgi?id=3599 Signed-off-by: David Shaohua Li <shaohua.li@xxxxxxxxx> Signed-off-by: Len Brown <len.brown@xxxxxxxxx> The bug snuck back in in commit 2feec47d4c5f (ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registers, 2012-02-14), presumably by copy/pasting a copy of the code without that fix for the legacy case. On affected machines, after that commit, the machine locks up hard on resume from suspend. The same fix as seven years ago still works. Addresses <https://bugzilla.kernel.org/show_bug.cgi?id=43641>. Reported-bisected-and-tested-by: Octavio Alvarez <alvarezp@xxxxxxxxxxxx> Reported-by: Adrian Knoth <adi@xxxxxxxxxxxxxxxxxxxxx> Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> # 3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
