[Bug 180564] kernel 2.6.22-14-generic doesn't restart timer after suspend-to-ram

[Pawel Ludwikow]

Public bug reported:

After suspend-to-ram kernel 2.6.22-14-generic doesn't start the system timer.
The waking procedure takes some key pressing and/or mouse movements to proceed. 

Previous version 2.6.20-16-generic [from ubuntu 7.04] worked perfectly
on this hardware.

System configuration: ubuntu 7.10 (upgraded from 7.04)
hardware: thinkpad/lenovo R60e
/proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 14
model name      : Intel(R) Celeron(R) M CPU        420  @ 1.60GHz
stepping        : 8
cpu MHz         : 1596.134
cache size      : 1024 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx constant_tsc up pni monitor tm2 xtpr
bogomips        : 3195.67
clflush size    : 64

==== and here is the proof ====
$ while true; do date; grep timer /proc/interrupts ; sleep 1; done
So, 5 sty 2008, 14:32:26 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:27 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:28 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:29 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:30 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:31 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:32 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:33 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:34 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:36 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:40 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:45 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:47 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:52 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:32:56 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:33:03 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:33:07 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:33:09 CET
  0:    4488609   IO-APIC-edge      timer
So, 5 sty 2008, 14:33:10 CET
=========

Expected result: interrupt count from system timer increases at least by 100 and time increases by 1 second.
Effect occurs: always after suspend-to-ram
Curiously, if a suspend-to-disk is made after that, the system reverts to normal functioning.

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

-- 
kernel 2.6.22-14-generic doesn't restart timer after suspend-to-ram
https://bugs.launchpad.net/bugs/180564
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