High hard drive temperature as of acpi-support_0.114-0intrepid2. Solved as of acpi-support_0.121.

[Tonohono]

Binary package hint: acpi-support

Since upgrading to acpi-support_0.114-0intrepid2 on the 15th, my laptop's hard drive temperature has jumped 9C when on AC power. On battery power, the temperature returns to normal.
Downgrading to acpi-support_0.114 and rebooting remedied the issue. Upgrading again to acpi-support_0.114-0intrepid2 reproduces the issue, with an almost immediate temperature increase.

When using acpi-support_0.114, switching between AC and battery does not alter hard drive temperature.

Consider the following comparisons when the hard drive is idle (e.g. no indexing, file transfers, or intensive i/o tasks).

=============================
acpi-support_0.114-0intrepid2

On AC power:
Room temp: 21C
HD temp: 55C

On battery power:
Room temp: 21C
HD temp: 46C

=============================
acpi-support_0.114

On AC power:
Room temp: 21C
HD temp: 46C

On battery power:
Room temp: 21C
HD temp: 46C
=============================

The position of the laptop has not changed, and there have been no external changes which could alter hard drive ventilation.

uname http://sadisticslinky.com/as/uname.txt
lspci http://sadisticslinky.com/as/lspci.txt
dmidecode http://sadisticslinky.com/as/dmidecode.txt

acpi-support_0.114
/proc/acpi http://sadisticslinky.com/as/as0114.tar.bz2

acpi-support_0.114-0intrepid2
/proc/acpi http://sadisticslinky.com/as/as0114-int2.tar.bz2

[Tonohono (tonohono-deactivatedaccount)]

With acpi-support_0.119 on Jaunty (Alpha 5), the same issue I described with acpi-support_0.114-0intrepid2 is experienced.

Hard drive temperature reaches ~55C when on AC power. After switching to battery power, the hard drive temperature soon begins to fall until it reaches ~46C. Switching back to AC power results in an increase in temperature.

I downgraded to acpi-support_0.114 from the Intrepid repo and turned off the laptop to allow hard drive temperature to fall to room temperature. After being turned back on and allowing the hard drive to reach ~46C and hold steady there for a couple hours, I upgrade to acpi-support_0.119. Again, almost immediately the temperature begins to increase until it hits ~55C.

The subsequent attachments are from the acpi-support_0.119 running on Jaunty.

[Tonohono (tonohono-deactivatedaccount)]

While this bug still affects Intrepid, it is no longer an issue in Jaunty as of acpi-support_0.121.

[Steve Langasek (vorlon)]

Thank you for taking the time to report this issue and help to improve Ubuntu.

Since you say this bug is resolved for you in jaunty, I'm closing out this report. I do not expect that we will be making further changes to the hard drive power handling in intrepid; the behavior you describe is an expected side-effect of addressing some equally problematic bugs with hard drive failures when the disk is allowed to spin down when on AC power. I'm actually not sure why the behavior is any different for you in jaunty vs. intrepid, since the acpi-support handling is the same in both, but that only further indicates that we should not be attempting to change this in intrepid if we don't understand it.

[Mark Goldshtein (ubuntu-listmail)]

Hello,

I am running U910 and a hard drive temperature is 10-11 Celsius degrees higher than in MS Windows 7, tasks are similar and rather lightweight for such laptop (typing, www).
'Slowdown hard disk if possible' option in U910 GNOME Power Management is enabled.
MS Windows shows 38-39 Celsius degrees, U910 shows 48-49 degrees. Room temperature is about 25 Celsius degrees. Values are measured by hddtemp daemon under Linux and a few special HDD utilities under MS Windows. Values are identical and match.

U910 with standard install and official repository.

Lenovo IdeaPad Y450-3M notebook with Western Digital hard drive:

-- Disk List ---------------------------------------------------------------
 (1) WDC WD2500BEVT-22ZCT0 : 250.0 GB [0-0-0, pd1]

----------------------------------------------------------------------------
 (1) WDC WD2500BEVT-22ZCT0
----------------------------------------------------------------------------
            Model : WDC WD2500BEVT-22ZCT0
         Firmware : 11.01A11
  Total Disk Size : 250.0 GB (8.4/137.4/250.0)
      Buffer Size : 8192 KB
    NV Cache Size : ----
      Queue Depth : 32
Number of Sectors : 488397168
    Rotation Rate : 5400 RPM
        Interface : Serial ATA
    Major Version : ATA8-ACS
    Minor Version : ----
    Transfer Mode : SATA/300
   Power On Hours : 362 hours
   Power On Count : 294 count
      Temperature : 45 C (113 F)
    Health Status : Good
         Features : S.M.A.R.T., APM, AAM, 48bit LBA, NCQ
        APM Level : 0080h [ON]
        AAM Level : 80FEh [OFF]

-- S.M.A.R.T. --------------------------------------------------------------
ID Cur Wor Thr RawValues(6) Attribute Name
01 200 200 _51 000000000000 Read Error Rate
03 192 186 _21 00000000055F Spin-Up Time
04 100 100 __0 00000000012A Start/Stop Count
05 200 200 140 000000000000 Reallocated Sectors Count
07 100 253 __0 000000000000 Seek Error Rate
09 100 100 __0 00000000016A Power-On Hours
0A 100 100 _51 000000000000 Spin Retry Count
0B 100 100 __0 000000000000 Recalibration Retries
0C 100 100 __0 000000000126 Power Cycle Count
C0 200 200 __0 0000000000BD Power-off Retract Count
C1 198 198 __0 0000000022C2 Load/Unload Cycle Count
C2 102 _96 __0 00000000002D Temperature
C4 200 200 __0 000000000000 Reallocation Event Count
C5 200 200 __0 000000000000 Current Pending Sector Count
C6 100 253 __0 000000000000 Uncorrectable Sector Count
C7 200 200 __0 000000000000 UltraDMA CRC Error Count
C8 100 253 _51 000000000000 Write Error Rate

[Steve Langasek (vorlon)]

Please open a new bug report. The behavior this bug referred to is resolved.