[Bugme-new] [Bug 21032] New: System hangs on Boot on Intel ATOM (samsung n510 @nynet)

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Sat Oct 23 19:18:21 PDT 2010


https://bugzilla.kernel.org/show_bug.cgi?id=21032

           Summary: System hangs on Boot on Intel ATOM (samsung n510
                    @nynet)
           Product: Power Management
           Version: 2.5
    Kernel Version: 2.6.36
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: intel_idle
        AssignedTo: power-management_intel_idle at kernel-bugs.osdl.org
        ReportedBy: lkml at qb352.de
                CC: lenb at kernel.org
        Regression: Yes


i have a samsung n510 @nynet netbook

starting in the 2.6.35 development cycle
the system hangs occasionally, especially on boot

This bug is present in 2.6.36 and 2.6.35.7

pressing the powerbutton or a key on the keyboard makes the system continue

this bug is quite reliable reproduceable ..

i did a bisection and ended up on following commit:
 2671717265ae6e720a9ba5f13fbec3a718983b65

booting the system with "intel_idle.max_cstate=0"
makes it not hang

The effects are strongest when intel_idle.max_cstate=2

Mr Brown gave me some Homework to do, here it comes:
failing .config .. attached
output from lspci .. hopefully can be attached
output from cat /proc/cpu .. hopefully can be attached
output from acpidump .. hopefully can be attached
output from dmidecode .. hopefully can be attached

for a 2.6.36 boot with intel_idle.max_cstate=0 (and acpi_idle boot)
output from grep . /sys/devices/system/cpu/cpuidle/*
output from grep . /sys/devices/system/cpu/cpu*/cpuidle/*/*
dmesg .. hopefully can be attached

try intel_idle.max_cstate=1, include dmesg
and increase the '1' until it fails
My guess is that 1 will work, but some higher number will start failing.

=> max_cstate=2 fails the strongest ... max_cstate=4 has not such a strong
effect

without any other bootparams, try "nolapic_timer"

=> yes, works .. does not hang .. see (hopefully) attached dmesg ending in
".nolapic"

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