On Thursday, July 07, 2016 12:26:49 AM Zheng, Lv wrote: > Hi, Rafael > > > From: Rafael J. Wysocki [mailto:rjw@xxxxxxxxxxxxx] > > Sent: Thursday, July 7, 2016 5:29 AM > > Subject: Re: Regression between rc2 and rc6: ACPI EC problems > > > > On Wednesday, July 06, 2016 11:14:11 PM Wolfram Sang wrote: > > > Hi, > > > > > > when upgrading from v4.7-rc2 to rc6 on my Dell Mini 9, battery and > > > temperature status info got bogus. Here is the major change between > > the > > > boot logs: > > > > > > ACPI : EC: EC stopped > > > ACPI Exception: AE_BAD_PARAMETER, Returned by Handler for > > [EmbeddedControl] (20160422/evregion-300) > > > ACPI Error: Method parse/execution failed [\_SB.PCI0.LPCB.EC0._REG] > > (Node f5d09870), AE_BAD_PARAMETER (20160422/psparse-542) > > > ACPI Exception: AE_BAD_PARAMETER, from region _REG, > > [EmbeddedControl] (20160422/evregion-397) > > > ACPI Exception: AE_BAD_PARAMETER, Returned by Handler for > > [EmbeddedControl] (20160422/evregion-300) > > > ACPI Error: Method parse/execution failed [\_SB.PCI0.LPCB.EC0._REG] > > (Node f5d09870), AE_BAD_PARAMETER (20160422/psparse-542) > > > ACPI Exception: AE_BAD_PARAMETER, from region _REG, > > [EmbeddedControl] (20160422/evregion-397) > > > ACPI : EC: GPE = 0x19, I/O: command/status = 0x66, data = 0x62 > > > ACPI : EC: EC started > [Lv Zheng] > This is a known order issue that ACPICA executes _REG(DISCONENCT) after removing the opregion handler. > But this issue is not a function failure, it only generates error garbage in the kernel log. > So we didn't fix it in a hurry. > > There is another order issue detected in the same Bugzilla entry that: > _REG(CONNECT/DISCONNECT) shouldn't be invoked for SystemMemory/SystemIo and PCI_Config that under a PCI root bus containing _BBN method. > Which is also proven by the Windows behavior and spec definitions. > > I was planning to fix the both issues in the ACPICA upstream. > The bug is here for your reference: > https://bugzilla.kernel.org/show_bug.cgi?id=102421 > > For now, since this is just a non-function-failure error report, we can ignore it. > Because sometimes, when there are several problems related, we have to make a choice to fix one of them first. Well, please look at the report again. It says: "when upgrading from v4.7-rc2 to rc6 on my Dell Mini 9, battery and temperature status info got bogus". So, it very much *is* a functional issue and I'm not going to ignore it. Thanks, Rafael -- 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
