Public bug reported:
Outlined below are steps to get suspend / resume functionality fully
working on intrepid on a HP TC1100 tablet. Incredibly, it suspends and
resumes in less than 3 seconds each way making it highly usable. (Big
Kudos to pm-utils developers!)
My version of the TC1100 came with an atheros wireless card. However,
the ath_pci driver does not seem to survive a suspend without being
explicitly listed.
If it is not listed, when waking up the card appears to be working fine
but, even after hundreds of tries, I cannot log into the network (WPA-
PSK here), it keeps asking me for the password. Unloading and reloading
the ath_pci module and manually doing step (3) fixes it.
This is how I got it working automatically
1) module tc1100-wmi MUST be loaded, it provides controls for turning wireless
on and off
2) create /etc/pm/config.d/config with SUSPEND_MODULES="ath_pci"
3) create a script in /etc/pm/sleep.d/ to turn off wireless and turn on
wireless again using the tc1100-wmi interface (see 35wireless attachment)
Find attached lspci, lsusb and aforementioned script
Known isssues:
tc1100-wmi cannot be used to probe the state of the wireless card, cat
/sys/devices/platform/tc1100-wmi/wireless ALWAYS reports 0 whether wireless is
off or on. This means that if wireless was off when suspending, it will wake up
with wireless turned on.
** Affects: pm-utils (Ubuntu)
Importance: Undecided
Status: New
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[intrepid] fix for suspend / resume on HP TC1100
https://bugs.launchpad.net/bugs/290332
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