sdhci: suspend problems with mounted partition

[Jamin W. Collins]

After upgrading to 8.10, suspending with a mounted mmc block device, such as /dev/mmcblk0p1, frequently results in the suspend failing and a kernel oops that prevents further suspends or automatic powering off of the system.

Lenovo Thinkpad T61p
Linux thinkpad 2.6.27-7-generic #1 SMP Tue Nov 4 19:33:20 UTC 2008 i686 GNU/Linux

Attached is the dmesg output after one such problem suspend.

[Jamin W. Collins (jcollins)]

The attached /etc/pm/sleep.d/ script helps to work around the problem. Since starting to use this script the problem seems to be completely corrected.

[Leann Ogasawara (leannogasawara)]

Hi Jamin,

Care to test and confirm if this issue remains with the most recent pre-release of Jaunty 9.04 (currently Alpha4) - http://cdimage.ubuntu.com/releases/jaunty/ . It contains a newer 2.6.28 based kernel. You should be able to test suspend via a LiveCD. Please let us know your results. Thanks.

[Jamin W. Collins (jcollins)]

Just tested with Alpha 4, first issue is that the live session does not support my laptop's trackpad.

As for the suspend testing, I tried three different ways with varying end results, but none resulted in a successful suspend and resume.

#1 - Booted with the SD card inserted. Attempted to suspend the system and the laptop hung in the process of suspending with a flashing moon (normally flashes while spending and then solid once suspended). At this point nothing I tried short of holding the power button had any effect.

#2 - Booted without the SD card inserted and did not insert it prior to attempting suspend. Unit appeared to suspend correctly, achieving a solid moon indicator. However, resume never achieved an active display, though the system did appear to go through the motions with the exception of the display.

#3 - Booted without the SD card and then inserted once on the desktop. Same results as #1.

At this point 9.04 would seem to be an overall regression in suspend functionality.

[Jeremy Foshee (jeremyfoshee)]

This bug report was marked as Triaged a while ago but has not had any updated comments for quite some time. Please let us know if this issue remains in the current Ubuntu release, http://www.ubuntu.com/getubuntu/download . If the issue remains, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Jamin W. Collins (jcollins)]

This bug is most certainly still present. Tested with 10.04 beta 1 i386 ISO and can suspend fine provided the SD card is not mounted in the MMC reader. If it is mounted suspend fails just as before.

[Ken VanDine (ken-vandine)]

I can confirm this bug as well, with Lucid RC installed. I have actually been suffering from this since early in the Karmic cycle. Only spending a little time trying to debug, never noticed it was linked to having a mounted SD card. I didn't really dig deeper until my wife's lucid install started to fail to suspend. So I have reproduced this on 2 laptops now, both with built-in SD cards. Ejecting the SD card before suspending works great.

[Brad Figg (brad-figg)]

This bug was filed against a series that is no longer supported and so is being marked as Won't Fix. If this issue still exists in a supported series, please file a new bug.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[mattsteven (matthew-matts)]

The new bug 879159