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authorRafael J. Wysocki <rjw@sisk.pl>2008-10-06 11:59:29 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-06 10:17:29 -0700
commite84956f92a846246b09b34f2a728329c386d250f (patch)
tree14fb8a2cb98fb26fc01ddfeecf15910e5e63b76a
parentfec6ed1d1f9b78a6acb4a3eb2c46c812ac2e96f0 (diff)
x86 ACPI: Blacklist two HP machines with buggy BIOSes
There is a bug in the BIOSes of some HP boxes with AMD Turions which connects IO-APIC pins with ACPI thermal trip points in such a way that if the state of the IO-APIC is not as expected by the (buggy) BIOS, the thermal trip points are set to insanely low values (usually all of them become 16 degrees Celsius). As a result, thermal throttling kicks in and knock the system down to its shoes. Unfortunately some of the recent IO-APIC changes made the bug show up. To prevent this from happening, blacklist machines that are known to be affected (nx6115 and 6715b in this particular case). This fixes http://bugzilla.kernel.org/show_bug.cgi?id=11516 listed as a regression from 2.6.26. On my box it was caused by: commit 691874fa96d6349a8b60f8ea9c2bae52ece79941 Author: Maciej W. Rozycki <macro@linux-mips.org> Date: Tue May 27 21:19:51 2008 +0100 x86: I/O APIC: timer through 8259A second-chance Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> and the whole story is described in this (huge) thread: http://marc.info/?l=linux-kernel&m=121358440508410&w=4 Matthew Garrett told us about that happening on the nx6125: http://marc.info/?l=linux-kernel&m=121396307411930&w=4 and then Maciej analysed the breakage on the basis of a DSDT from the nx6325: http://marc.info/?l=linux-kernel&m=121401068718826&w=4 As far as the Dmitry's and Jason's boxes are concerned, I recognized the symptoms and asked them to verify that the blacklisting helped. It appears that the buggy BIOS code has been copy-pasted to the entire range of machines, for no good reason. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Tested-by: Jason Vas Dias <jason.vas.dias@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/x86/kernel/acpi/boot.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index bfd10fd211cd..c102af85df9c 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1605,6 +1605,14 @@ static struct dmi_system_id __initdata acpi_dmi_table[] = {
*/
{
.callback = dmi_ignore_irq0_timer_override,
+ .ident = "HP nx6115 laptop",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
+ },
+ },
+ {
+ .callback = dmi_ignore_irq0_timer_override,
.ident = "HP NX6125 laptop",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
@@ -1619,6 +1627,14 @@ static struct dmi_system_id __initdata acpi_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
},
},
+ {
+ .callback = dmi_ignore_irq0_timer_override,
+ .ident = "HP 6715b laptop",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
+ },
+ },
{}
};