2009/7/9 Rafael J. Wysocki <rjw@xxxxxxx>: > On Thursday 09 July 2009, Alan Jenkins wrote: >> 2009/7/8 Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>: >> > On Wednesday 08 July 2009 21:41:17 Rafael J. Wysocki wrote: >> >> On Wednesday 08 July 2009, Alan Jenkins wrote: >> >> > Hi, >> >> > >> >> > I've borrowed this laptop for a few days. Linux works pretty well, >> >> > but I found a problem on newer kernels. After suspend it claims the >> >> > battery has been removed. E.g. /proc/acpi/battery/BAT0/state claims >> >> > the battery is not present (but it is). >> >> > >> >> > I've attached acpidump and dmidecode output at >> >> > <http://bugzilla.kernel.org/show_bug.cgi?id=13745>. I still have >> >> > access to the laptop for further tests, but only until Friday. >> >> > >> >> > I bisected it to the commit below. Manually reverting the patch fixes >> >> > the problem (in both 2.6.30 and 2.6.31-rc2). >> >> >> >> Well, the commit below can't be reverted, because that would cause the boxes >> >> it fixed to stop working. >> >> >> >> Now, the only case this patch can make any difference is when the BIOS doesn't >> >> set SCI_EN before returning control the the kernel, which quite evidently is a >> >> BIOS bug. The fact that the battery doesn't work with this patch applied means >> >> that the BIOS not only doesn't set SCI_EN, but also expects it to remain unset, >> >> which is insane. >> >> >> >> IMO this is a "won't fix", sorry. >> > >> > Lets be pragmatic here.. >> > >> > Besides this is a regression and we are already handling some such insane >> > systems in STR case. Moreover sending SMI ACPI_ENABLE command may result in >> > some things happening behind our back and not only setting of SCI_EN bit.. >> > >> > PS Looking at the set_sci_en_on_resume quirk history it seems that if we are >> > lucky we may may fix another issue (screaming IRQ one) at the same time :) >> > >> > Alan, could you try this patch? >> > >> > --- >> > debug patch (needs to have both CONFIG_SUSPEND=y & CONFIG_HIBERNATION=y) >> > >> > drivers/acpi/sleep.c | 13 ++++++++++++- >> > 1 file changed, 12 insertions(+), 1 deletion(-) >> > >> > Index: b/drivers/acpi/sleep.c >> > =================================================================== >> > --- a/drivers/acpi/sleep.c >> > +++ b/drivers/acpi/sleep.c >> > @@ -383,6 +383,14 @@ static struct dmi_system_id __initdata a >> > }, >> > }, >> > { >> > + .callback = init_set_sci_en_on_resume, >> > + .ident = "Hewlett-Packard HP G7000 Notebook PC", >> > + .matches = { >> > + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), >> > + DMI_MATCH(DMI_PRODUCT_NAME, "HP G7000 Notebook PC"), >> > + }, >> > + }, >> > + { >> > .callback = init_old_suspend_ordering, >> > .ident = "Panasonic CF51-2L", >> > .matches = { >> >> Thanks for coding this up for me in full. It works, the battery now >> survives, and it does indeed remove the IRQ warning. > > Great, thanks for testing, Bart, thanks for the patch! > > Len, can you add the Bart's patch to your 2.6.31 queue, please? > >> I didn't test the hibernation hunk. I have hibernation set up, but >> there is a different problem (not a regression). I don't have much >> more time to investigate on this laptop, so I don't expect to get it >> fixed. But here are some details anyway :-). >> >> When I run s2disk, it writes the image out, and then instantly >> resumes. It doesn't seem to read the image, but neither does the >> kernel report an error: >> >> [ 491.088802] ACPI: Preparing to enter system sleep state S4 >> [ 491.090498] PM: Saving platform NVS memory >> [ 491.094638] Disabling non-boot CPUs ... >> [ 491.094867] PM: Creating hibernation image: >> [ 491.096015] PM: Need to copy 114990 pages >> [ 491.096015] PM: Normal pages needed: 114990 + 1024 + 22, available >> pages: 144595 >> [ 491.096015] PM: Hibernation image created (114990 pages copied) >> [ 491.096015] ACPI: Waking up from system sleep state S4 >> >> It happens on 2.6.24-23-generic, 2.6.30, and 2.6.30-rc2. > > Hmm. Interesting. > > I _guess_ this problem is ACPI-related as well. You can try putting > 'shutdown method = shutdown' into /etc/suspend.conf (or whatever the s2disk's > configuration file is on your system). That doesn't change anything. > If possible, it would be interesting to see if that also happens if > 'echo disk > /sys/power/state' is used to trigger hibernation instead of > s2disk. In particular when booted with init=/bin/bash. That worked, even though I didn't use init=/bin/bash. If it matters, I'm using a swap file on an NTFS partition. [The system was installed by Ubuntu "Wubi" (i.e. using Windows partition and bootloader), but I had to set up both uswsusp and kernel swsusp myself. pm-hibernate refuses to work; I don't think it knows about swap files]. I noticed an error message, I'm not sure if it's relevant or not. Suspending using this method, I see two lines of ATA errors on the console when suspending. They appear to be post-snapshot - they don't appear in the log - but it looks like the same error happens on resume too. s2disk generates the same error on resume as well. [ 192.247475] sd 0:0:0:0: [sda] Starting disk [ 192.340428] ata4.00: ACPI cmd ef/03:0c:00:00:00:a0 filtered out [ 192.340432] ata4.00: ACPI cmd ef/03:22:00:00:00:a0 filtered out [ 192.372314] ata4.00: configured for MWDMA2 [ 192.640075] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 192.642338] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 filtered out [ 192.644365] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 filtered out [ 192.644381] ata1.00: configured for UDMA/100 * [ 192.660076] ata1: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0x9 t4 * [ 192.660079] ata1: irq_stat 0x00400040, connection status changed [ 192.663198] ata1.00: configured for UDMA/100 [ 192.663201] ata1: EH complete The lines marked with * are the ones that appear on the console during suspend. This happens on both 2.6.31-rc2 and 2.6.30. Thanks Alan -- 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
