when I reboot my laptop the BIOS complains about a keyboard controller
failure and timer interrupts not working. On the BIOS password screen
the keyboard doesn't work. If I disable the BIOS password the system
hangs a bit later on the POST screen. I tried all reboot methods via the
kernel command line without success. I saw this problem with Debian
Woody's precompiled 2.4.18 kernel, self compiled Debian 2.4.20 sources
and Linux 2.4.21-rc1+ACPI patch. This problem only occurs if
CONFIG_X86_LOCAL_APIC is enabled. With CONFIG_X86_LOCAL_APIC disabled it
reboots just fine.
My guess is that it's a BIOS bug as I've never had this problem on other
machines before. I found a workaround: disable the local APIC before
rebooting. I don't really know how it works. Just calling
disable_local_APIC wasn't enough, so I copied a bit more code from
apic_pm_suspend (arch/i386/kernel/apic.c:465) to machine_restart
(arch/i386/kernel/process.c:369). I'm pretty sure that this is not the
proper way to do it but it works here. A patch against 2.4.21-rc1 can be
found at the end of this email.
Best regards,
Felix
System Information:
Linux 2.4.21-rc1 with acpi-20030424-2.4.21-rc1.diff.gz
Output from scripts/ver_linux:
Linux trabant 2.4.21-rc1 #16 Wed Apr 30 20:07:14 CEST 2003 i686 mobile AMD Athlon(tm) XP 2000+ AuthenticAMD GNU/Linux
Gnu C gcc-3.2 (GCC) 3.2.3 20030309 (Debian prerelease)
Gnu make 3.80
util-linux 2.11y
mount 2.11y
modutils 2.4.21
e2fsprogs 1.32
pcmcia-cs 3.1.33
PPP 2.4.2b3
Linux C Library 2.3.1
Dynamic linker (ldd) 2.3.1
Procps 3.1.6
Net-tools 1.60
Console-tools 0.2.3
Sh-utils 4.5.2
Modules Loaded soundcore input ohci1394 ieee1394 via-rhine mii ehci-hcd usb-uhci usbcore rtc
/proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 8
model name : mobile AMD Athlon(tm) XP 2000+
stepping : 1
cpu MHz : 1658.556
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
bogomips : 3309.56
/proc/interrupts
CPU0
0: 276279 XT-PIC timer
1: 641 XT-PIC keyboard
2: 0 XT-PIC cascade
5: 2 XT-PIC ohci1394
8: 4 XT-PIC rtc
9: 5 XT-PIC acpi
10: 877 XT-PIC usb-uhci, eth0
11: 0 XT-PIC PCI device 1524:1410 (ENE Technology Inc), usb-uhci, ehci-hcd
12: 536 XT-PIC PS/2 Mouse
14: 7100 XT-PIC ide0
15: 1 XT-PIC ide1
NMI: 0
LOC: 275894
ERR: 167
/proc/ioports
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0376-0376 : ide1
03c0-03df : vesafb
03f6-03f6 : ide0
0cf8-0cff : PCI conf1
1100-110f : VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE
1100-1107 : ide0
1108-110f : ide1
1200-121f : VIA Technologies, Inc. USB
1200-121f : usb-uhci
1300-131f : VIA Technologies, Inc. USB (#2)
1300-131f : usb-uhci
4000-40ff : PCI CardBus #02
4400-44ff : PCI CardBus #02
c000-dfff : PCI Bus #01
e100-e1ff : VIA Technologies, Inc. VT8233 AC97 Audio Controller
e200-e2ff : VIA Technologies, Inc. AC97 Modem Controller
e300-e3ff : VIA Technologies, Inc. VT6102 [Rhine-II]
e300-e3ff : via-rhine
ff00-ff7f : VIA Technologies, Inc. IEEE 1394 Host Controller
/proc/iomem
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000e0000-000effff : Extension ROM
000f0000-000fffff : System ROM
00100000-0efeffff : System RAM
00100000-0024ed36 : Kernel code
0024ed37-002cf4bf : Kernel data
0eff0000-0effffbf : ACPI Tables
0effffc0-0effffff : ACPI Non-volatile Storage
10000000-10000fff : PCI device 1524:1410 (ENE Technology Inc)
10400000-107fffff : PCI CardBus #02
10800000-10bfffff : PCI CardBus #02
90000000-9fffffff : PCI Bus #01
90000000-97ffffff : S3 Inc. VT8751 [ProSavageDDR P4M266] VGA Controller
90000000-90eeffff : vesafb
a0000000-a3ffffff : VIA Technologies, Inc. P/KN266 Host Bridge
e0000000-efffffff : PCI Bus #01
e0000000-e007ffff : S3 Inc. VT8751 [ProSavageDDR P4M266] VGA Controller
f0000000-f00000ff : VIA Technologies, Inc. USB 2.0
f0000000-f00000ff : ehci-hcd
f0000100-f00001ff : VIA Technologies, Inc. VT6102 [Rhine-II]
f0000100-f00001ff : via-rhine
fedff800-fedfffff : VIA Technologies, Inc. IEEE 1394 Host Controller
fedff800-fedfffff : ohci1394
fff80000-ffffffff : reserved
Relevant parts from dmesg:
[...]
Local APIC disabled by BIOS -- reenabling.
Found and enabled local APIC!
Initializing CPU#0
Detected 1658.556 MHz processor.
[...]
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 256K (64 bytes/line)
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU: After generic, caps: 0383fbff c1cbfbff 00000000 00000000
CPU: Common caps: 0383fbff c1cbfbff 00000000 00000000
CPU: AMD mobile AMD Athlon(tm) XP 2000+ stepping 01
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
[...]
enabled ExtINT on CPU#0
ESR value before enabling vector: 00000000
ESR value after enabling vector: 00000000
Using local APIC timer interrupts.
calibrating APIC timer ...
..... CPU clock speed is 1658.5779 MHz.
..... host bus clock speed is 265.3724 MHz.
cpu: 0, clocks: 2653724, slice: 1326862
CPU0<T0:2653712,T1:1326848,D:2,S:1326862,C:2653724>
[...]
Workaround:
--- linux-2.4.21-rc1-acpi.orig/arch/i386/kernel/process.c 2003-04-30 21:13:20.000000000 +0200
+++ linux/arch/i386/kernel/process.c 2003-04-30 20:04:49.000000000 +0200
@@ -47,6 +47,9 @@
#ifdef CONFIG_MATH_EMULATION
#include <asm/math_emu.h>
#endif
+#ifdef CONFIG_X86_LOCAL_APIC
+#include <asm/apic.h>
+#endif
#include <linux/irq.h>
@@ -400,6 +403,20 @@
*/
smp_send_stop();
disable_IO_APIC();
+#else
+#ifdef CONFIG_X86_LOCAL_APIC
+ {
+ unsigned int l, h;
+ unsigned long flags;
+ __save_flags(flags);
+ __cli();
+ disable_local_APIC();
+ rdmsr(MSR_IA32_APICBASE, l, h);
+ l &= ~MSR_IA32_APICBASE_ENABLE;
+ wrmsr(MSR_IA32_APICBASE, l, h);
+ __restore_flags(flags);
+ }
+#endif
#endif
if(!reboot_thru_bios) {
-
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