[alsa-devel] PNP_DRIVER_RES_DISABLE breaks swsusp at least with snd_cs4236
linux at rainbow-software.org
Wed Jan 9 23:43:47 CET 2008
as hibernation (swsusp) started to work with my CPU, I found that my Turtle
Beach Malibu stops working after resume from hibernation. It's caused by fact
that the card is not enabled on the pnp layer during resume - and thus card
registers are inaccessible (reads return FFs, writes go nowhere).
During resume, pnp_bus_resume() in drivers/pnp/driver.c is called for each pnp
device. This function calls pnp_start_dev() only when the
PNP_DRIVER_RES_DO_NOT_CHANGE bit is NOT seting pnp_drv->flags. But the cs4236
driver in sound/isa/cs423x/cs4236.c explicitly sets the .flags to
PNP_DRIVER_RES_DISABLE - it's value is 3 and that includes
The same .flags value is present in many of the ALSA ISA sound drivers.
Removing that .flags line caused this to appear inlog when loading snd_cs4236
CS4236+ WSS PnP manual resources are invalid, using auto config
CS4236+ CTRL PnP manual resources are invalid, using auto config
CS4236+ MPU401 PnP manual resources are invalid, using auto config
and the sound now works after resume!
So the question is: why is this line present?
Is this a bug? What's the correct fix?
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