Ticket #1857 (closed defect: fixed)

Opened 11 years ago

Last modified 2 years ago

Powering down GSM module kills resume

Reported by: ChristW Owned by: openmoko-kernel
Priority: normal Milestone:
Component: kernel Version: Om2008.8
Severity: normal Keywords: GSM off -> no resume
Cc: Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: no PatchReviewResult:
Reproducible: always


I have the attached script on my phone, called pf (for Phone ofF) to turn off the GSM modem.

When I run the script and shortly press the power button to suspend, I am unable to resume again. I have been able to reproduce it a couple of times before I decided not to use this script at the moment :-)

I use OM2008.8 with Zecke's testing feed. opkg list_installed says:
kernel - 2:2.6.24+git75965+cb3cc53a76c7f1f7c827d048db7a849e77071515-r1.01 -


pf (781 bytes) - added by ChristW 11 years ago.
Phone ofF script to turn off GSM modem to save power

Change History

Changed 11 years ago by ChristW

Phone ofF script to turn off GSM modem to save power

comment:1 Changed 11 years ago by zecke

  • Owner changed from openmoko-devel to openmoko-kernel
  • Component changed from unknown to System Software


comment:2 Changed 10 years ago by bbb8

So it seems turning off the gsm modem even manually is not allowing the system to suspend but just turning the backlight of the screen off, tricking alot of us (including me) into thinking the phone is in suspend and is not resuming so only way to take battery out, but ssh is active and apm -s shows device or resource busy , backlight can be turned back on by echoing either 1 or 0 to /sys/devices/platform/s3c2440-i2c/i2c-adapter/i2c-0/0-0073/backlight/pcf50633-bl/bl_power and ,xset s reset and putting brightness back up to 63 , only way i found allowing me to suspend again to ./etc/init.d/xserver-nodm stop

HELP!! :)

comment:3 Changed 10 years ago by charlie

  • HasPatchForReview unset

Can we have more information about this bug and how trigger it ?

I have been unable to reproduce it on my phone (gta02, with kernel 2.6.24+r10+gitr9706327002caebe6633c93e605882ea37172ec57-r10.1)

Yet, I saw it happening a few times when i didn't try to trigger it.

comment:4 Changed 10 years ago by bbb8

what distro are you using? i could trigger it by echo 0 > /sys/devices/platform/neo1973-pm-gsm.0/power_on and see if it suspends, you can also play around with file /etc/X11/Xsession.d/89qtopia and edit the echo 1 in there and see what results u get, but i'm guessing that this is most probably from QPE

comment:5 Changed 10 years ago by mickey

Does properly shutting down the modem (sending AT@POFF) before hitting the power switch (echo .../power_on) make a difference?

comment:6 Changed 10 years ago by PaulFertser

  • Status changed from new to closed
  • Resolution set to fixed

Not reproducible with modern systems.

comment:7 Changed 2 years ago by Kennescoma

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