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CPU stall on T500 - causes?

T400/410/420 and T500/510/520 series specific matters only
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miasma
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CPU stall on T500 - causes?

#1 Post by miasma » Wed Jun 17, 2020 2:20 am

Started experiencing this recently - symptom is that the whole system locks up for a few seconds (intermittently responsive during that time) then returns to normal operation.

Distinctive symptom is that input is lost - i.e. if I am typing when it stalls, the keystrokes are completely lost; this seems different from software-type stalls when the input eventually catches up.

Have installed some new software recently but doubt any of that is the cause - certainly incidents are not software specific, and Resource Monitor does not show anything repeatedly hogging CPU.

Can be tracked on Resource Monitor - stalls coincide with CPU frequency dropping to 0 (usually at 98+%).

First suspect is heat; fan is not obviously running. Is there a heat monitor recommended for Thinkpads? Used to use CPUZ HWMonitor, not installed here, will give it a go. Also will close down system cleanly and run Lenovo diagnostics. Any other suggestions in the meantime please?
Last edited by miasma on Wed Jun 17, 2020 3:40 am, edited 1 time in total.
T500 / T9400 / 8GB / SSD / Windows 7 Pro

miasma
Posts: 14
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Re: CPU stall on T500 - causes?

#2 Post by miasma » Wed Jun 17, 2020 3:39 am

Hmm... HWMonitor says max CPU temp (core # 1) 67C - pretty sure that is within spec - and had 1 seizure already.

Is it significant that Core # 0 temps are much lower - e.g. max 58C?
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MikalE
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Re: CPU stall on T500 - causes?

#3 Post by MikalE » Wed Jun 17, 2020 7:35 am

I had an IBM PII machine years ago that did that. It used to drive me nuts.

I ended up removing the software I had installed, though I don't remember what that was so many years ago.

It was like the processor was so busy it ignored the keyboard until it could finish whatever it was doing.

Looking back, I think it was a background process associated with the installed software.
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Re: CPU stall on T500 - causes?

#4 Post by kfzhu1229 » Wed Jun 17, 2020 2:34 pm

If some of your software bugs out drivers such as chipset and power management drivers, this can happen.
Try also to put your power mode to high performance, and then see if the fan spins loud when your freezing happens.
Clean the heatsink and redo the thermal paste anyways though. Had this issue on a Lenovo Erazer laptop and that turned out to be broken GPU mounting thus one side of the GPU die doesn't get cooling but the thermal diode doesn't see that. Learnt that the hard way when graphical corruption began.
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Re: CPU stall on T500 - causes?

#5 Post by miasma » Mon Jun 29, 2020 9:53 am

Not sure this is [SOLVED] but it has stopped.

The only significant change I made to "fix" it was deleting crap from the SSD, which had been showing capacity bar in red in File Explorer (below about 20% free space on the C: partition, I think).

After a re-boot, no more stalls.

While reading around, I discovered the concept of over-provisioning for SSD, so no, I hadn't set that up properly - may be related.

Hope this proves useful, somewhere, someday, somewho.
T500 / T9400 / 8GB / SSD / Windows 7 Pro

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Re: CPU stall on T500 - causes?

#6 Post by kfzhu1229 » Mon Jun 29, 2020 2:37 pm

miasma wrote:
Mon Jun 29, 2020 9:53 am
The only significant change I made to "fix" it was deleting crap from the SSD, which had been showing capacity bar in red in File Explorer (below about 20% free space on the C: partition, I think).
Okay that can be extremely harmful to the lifespan of your SSD. Go download Crystaldiskinfo and have a look at the health evaluations of your SSD. I am afraid your SSD is already having retired cells and is on its way out.
Dell Lat CP MMX-233 64mb 40gb W2k
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Re: CPU stall on T500 - causes?

#7 Post by RealBlackStuff » Tue Jun 30, 2020 12:11 am

Go to Windows\SoftwareDistribution\Download and delete whatever is IN there (NOT the directory itself).
Everything that W7 downloads (either in the background or via updates) gets stored and stays there.
You could have a shedload of useless files.
I have seen laptops with 15-20GB junk in there!
Check that every once in a while.
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miasma
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Re: CPU stall on T500 - causes?

#8 Post by miasma » Tue Jun 30, 2020 5:05 am

kfzhu1229 wrote:
Mon Jun 29, 2020 2:37 pm
miasma wrote:
Mon Jun 29, 2020 9:53 am
The only significant change I made to "fix" it was deleting crap from the SSD, which had been showing capacity bar in red in File Explorer (below about 20% free space on the C: partition, I think).
Okay that can be extremely harmful to the lifespan of your SSD. Go download Crystaldiskinfo and have a look at the health evaluations of your SSD. I am afraid your SSD is already having retired cells and is on its way out.
Thanks - looks like this. GUI says " Health Status : Good (84 %)", so I'm assuming SSD is... good.

Code: Select all

----------------------------------------------------------------------------
CrystalDiskInfo 8.6.2 (C) 2008-2020 hiyohiyo
                                Crystal Dew World: https://crystalmark.info/
----------------------------------------------------------------------------

    OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)
  Date : 2020/06/30 11:41:29

-- Controller Map ----------------------------------------------------------
 - Ricoh SD/MMC Host Controller [ATA]
 - Ricoh xD-Picture Card Controller [ATA]
 - Ricoh Memory Stick Controller [ATA]
 + Intel(R) ICH9M/M-E 2 port Serial ATA Storage Controller 1 - 2928 [ATA]
   + ATA Channel 0 (0)
     - Disk drive
   + ATA Channel 1 (1)
     - MATSHITA DVD-RAM UJ862A ATA Device
 + Intel(R) Turbo Memory Controller [SCSI]
   - IMD-0

-- Disk List ---------------------------------------------------------------
 (1) Crucial_CT525MX300SSD1 : 525.1 GB [1/0/0, pd1] - mi

----------------------------------------------------------------------------
 (1) Crucial_CT525MX300SSD1
----------------------------------------------------------------------------
           Model : Crucial_CT525MX300SSD1
        Firmware : M0CR031
   Serial Number : 16451498B368
       Disk Size : 525.1 GB (8.4/137.4/525.1/525.1)
     Buffer Size : Unknown
     Queue Depth : 32
    # of Sectors : 1025610768
   Rotation Rate : ---- (SSD)
       Interface : Serial ATA
   Major Version : ACS-3
   Minor Version : ACS-3 Revision 5
   Transfer Mode : SATA/300 | SATA/600
  Power On Hours : 2075 hours
  Power On Count : 3336 count
     Host Writes : 60664 GB
Wear Level Count : 244
     Temperature : 26 C (78 F)
   Health Status : Good (84 %)
        Features : S.M.A.R.T., APM, 48bit LBA, NCQ, TRIM, DevSleep
       APM Level : 00FEh [ON]
       AAM Level : ----
    Drive Letter : C: Q:

-- S.M.A.R.T. --------------------------------------------------------------
ID Cur Wor Thr RawValues(6) Attribute Name
01 100 100 __0 000000000000 Raw Read Error Rate
05 100 100 _10 000000000000 Reallocated NAND Blocks
09 100 100 __0 00000000081B Power On Hours
0C 100 100 __0 000000000D08 Power Cycle Count
AB 100 100 __0 000000000000 Program Fail Count
AC 100 100 __0 000000000000 Erase Fail Count
AD _84 _84 __0 0000000000F4 Average Block-Erase Count
AE 100 100 __0 0000000000C9 Unexpected Power Loss Count
B7 100 100 __0 000000000000 SATA Interface Downshift
B8 100 100 __0 000000000000 Error Correction Count
BB 100 100 __0 000000000000 Reported Uncorrectable Errors
C2 _74 _50 __0 00320005001A Temperature
C4 100 100 __0 000000000000 Reallocation Event Count
C5 100 100 __0 000000000000 Current Pending Sector Count
C6 100 100 __0 000000000000 Smart Off-line Scan Uncorrectable Error Count
C7 100 100 __0 000000000000 Ultra DMA CRC Error Rate
CA _84 _84 __1 000000000010 Percent Lifetime Used
CE 100 100 __0 000000000000 Write Error Rate
F6 100 100 __0 001D9F13015D Total Host Sector Writes
F7 100 100 __0 0000ED3F17A8 Host Program Page Count
F8 100 100 __0 0000243CBD76 Background Program Page Count
B4 __0 __0 __0 000000000792 Unused Reserve NAND Blocks
D2 100 100 __0 000000000000 Successful RAIN Recovery Count

-- IDENTIFY_DEVICE ---------------------------------------------------------
        0    1    2    3    4    5    6    7    8    9
000: 0440 3FFF C837 0010 0000 0000 003F 0000 0000 0000
010: 2020 2020 2020 2020 3136 3435 3134 3938 4233 3638
020: 0000 0000 0000 204D 3043 5230 3331 4372 7563 6961
030: 6C5F 4354 3532 354D 5833 3030 5353 4431 2020 2020
040: 2020 2020 2020 2020 2020 2020 2020 8010 4001 2F00
050: 4001 0000 0000 0007 3FFF 0010 003F FC10 00FB B110
060: FFFF 0FFF 0000 0007 0003 0078 0078 0078 0078 4DB8
070: 0000 0000 0000 0000 0000 001F 950E 00C4 014C 0048
080: 07F8 006D 706B 7409 6163 7069 B409 6163 207F 0001
090: 0001 00FE FFFE 0000 0000 0000 0000 0000 0000 0000
100: 9410 3D21 0000 0000 0000 0008 4000 0000 500A 0751
110: 1498 B368 0000 0000 0000 0000 0000 0000 0000 411E
120: 401C 0000 0000 0000 0000 0000 0000 0000 0029 3439
130: 6536 3663 3900 0000 0000 0000 0000 0000 0000 0000
140: 0000 0000 0000 0000 0000 0000 0000 4D54 4644 4441
150: 4B35 3235 5442 5220 0000 0000 0000 0000 0000 A5A5
160: 0000 0000 0000 0000 0000 0000 0000 0000 0003 0001
170: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
180: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
190: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
200: 0000 0000 0000 0000 0000 0000 0035 0000 0000 4000
210: 0000 0000 0000 0001 0000 0000 0000 0001 0000 0000
220: 0000 0000 10FF 0000 0000 0000 0000 0000 0000 0000
230: 9410 3D21 0000 0000 0001 00FF 0000 0000 0000 0000
240: 0000 0000 0000 4000 0000 0000 0000 0000 0000 0000
250: 0000 0000 0000 0000 0000 EDA5

-- SMART_READ_DATA ---------------------------------------------------------
     +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
000: 10 00 01 2F 00 64 64 00 00 00 00 00 00 00 05 32
010: 00 64 64 00 00 00 00 00 00 00 09 32 00 64 64 1B
020: 08 00 00 00 00 00 0C 32 00 64 64 08 0D 00 00 00
030: 00 00 AB 32 00 64 64 00 00 00 00 00 00 00 AC 32
040: 00 64 64 00 00 00 00 00 00 00 AD 32 00 54 54 F4
050: 00 00 00 00 00 00 AE 32 00 64 64 C9 00 00 00 00
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080: 00 00 00 00 00 00 C2 22 00 4A 32 1A 00 05 00 32
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100: 00 00 00 92 07 00 00 00 00 00 D2 32 00 64 64 00
110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
160: 00 00 00 00 00 00 00 00 00 00 00 00 6F 05 00 7B
170: 03 00 01 00 02 07 03 00 00 00 00 00 00 00 00 00
180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 9D

-- SMART_READ_THRESHOLD ----------------------------------------------------
     +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
000: 10 00 01 00 00 00 00 00 00 00 00 00 00 00 05 0A
010: 00 00 00 00 00 00 00 00 00 00 09 00 00 00 00 00
020: 00 00 00 00 00 00 0C 00 00 00 00 00 00 00 00 00
030: 00 00 AB 00 00 00 00 00 00 00 00 00 00 00 AC 00
040: 00 00 00 00 00 00 00 00 00 00 AD 00 00 00 00 00
050: 00 00 00 00 00 00 AE 00 00 00 00 00 00 00 00 00
060: 00 00 B7 00 00 00 00 00 00 00 00 00 00 00 B8 00
070: 00 00 00 00 00 00 00 00 00 00 BB 00 00 00 00 00
080: 00 00 00 00 00 00 C2 00 00 00 00 00 00 00 00 00
090: 00 00 C4 00 00 00 00 00 00 00 00 00 00 00 C5 00
0A0: 00 00 00 00 00 00 00 00 00 00 C6 00 00 00 00 00
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0C0: 00 00 CA 01 00 00 00 00 00 00 00 00 00 00 CE 00
0D0: 00 00 00 00 00 00 00 00 00 00 F6 00 00 00 00 00
0E0: 00 00 00 00 00 00 F7 00 00 00 00 00 00 00 00 00
0F0: 00 00 F8 00 00 00 00 00 00 00 00 00 00 00 B4 00
100: 00 00 00 00 00 00 00 00 00 00 D2 00 00 00 00 00
110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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1A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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1F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 13

Last edited by miasma on Tue Jun 30, 2020 5:47 am, edited 1 time in total.
T500 / T9400 / 8GB / SSD / Windows 7 Pro

miasma
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Joined: Thu Mar 12, 2015 6:36 pm
Location: Manchester, UK

Re: CPU stall on T500 - causes?

#9 Post by miasma » Tue Jun 30, 2020 5:07 am

RealBlackStuff wrote:
Tue Jun 30, 2020 12:11 am
Go to Windows\SoftwareDistribution\Download and delete whatever is IN there (NOT the directory itself).
Everything that W7 downloads (either in the background or via updates) gets stored and stays there.
You could have a shedload of useless files.
I have seen laptops with 15-20GB junk in there!
Check that every once in a while.
Thanks. Only 54MB there; can do other housekeeping as well - recycle bin, web Downloads, redundant backups (until I need them)...
T500 / T9400 / 8GB / SSD / Windows 7 Pro

kfzhu1229
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Re: CPU stall on T500 - causes?

#10 Post by kfzhu1229 » Tue Jun 30, 2020 1:13 pm

miasma wrote:
Tue Jun 30, 2020 5:05 am
Thanks - looks like this. GUI says " Health Status : Good (84 %)", so I'm assuming SSD is... good.
That means you have already deteriated the health of the SSD with that harmful use. The SSD wont be the issue yet if you dont stuff it that full ever again, but it is sort of on it's way out as even my 9 year old Intel SSD still has a health of 100% (Its so old that it doesnt even have SATA3)
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Lat D830 X9000 8gb 128gb WSXGA+ Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

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