Messages in this thread |  | | Date | Wed, 31 Oct 2001 19:19:26 -0000 | From | Alex Bligh - linux-kernel <> | Subject | 2xQ: Is PM + ACPI but /no/ APM a valid configuration? Interrupts enabled in APM set power state? |
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I am trying to debug power management on an IBM T23.
No PM, no ACPI, no APM
suspend works - i.e. doesn't crash on resume, but 'dumbly' and doesn't restore some PCI states (unsurprising), clock, etc., and no /proc/apm etc.
PM, no ACPI, no APM
this seems to work, but debugging the power management stuff suggests that the PCI drivers are never sent suspend or resume events, which is causing the crashes below.
PM, ACPI, no APM
This is the wierd one. I get a pile of scrolly messages which I think is ACPI debugging and appear to be uninterruptible - SysRq K crashes the machine. They are attached at the bottom.
Is this a valid configuration? I can't see why not.
PM, no ACPI, APM
Machine hangs on resume.
printk()s tell me that it successfully does all the pm_send stuff, then calls apm_set_power_state() (I can see this immediately before the LCD disappears). But on resume, though the LCD comes back on, it never gets to the printk() I inserted immediately afterwards.
PM, ACPI, APM
as above
Also, on advice, I have APM configured to allow interrupts (IBM laptop). So what happens if a device interrupts as / because of the resume, perhaps before the segment registers have been restored, and certainly before the pm_send stuff has gone around?
[kernel 2.4.12-ac5 at present]
-- Alex Bligh
... dswexec-0421 [07] Ds_exec_end_op : [Store]: Could not resolve operands, AE_NOT_EXIST evregion-0218 [16] Ev_address_space_dispa : no handler for region (c1b74108) [Embedded Control] exfldio-0224 [15] Ex_read_field_datum : Region Embedded_control(3) has no handler dswexec-0421 [07] Ds_exec_end_op : [Store]: Could not resolve operands, AE_NOT_EXIST evregion-0218 [16] Ev_address_space_dispa : no handler for region (c1b74108) [Embedded Control] exfldio-0224 [15] Ex_read_field_datum : Region Embedded_control(3) has no handler dswexec-0421 [07] Ds_exec_end_op : [Store]: Could not resolve operands, AE_NOT_EXIST evregion-0218 [16] Ev_address_space_dispa : no handler for region (c1b74108) [Embedded Control] exfldio-0224 [15] Ex_read_field_datum : Region Embedded_control(3) has no handler dswexec-0421 [07] Ds_exec_end_op : [Store]: Could not resolve operands, AE_NOT_EXIST evregion-0218 [16] Ev_address_space_dispa : no handler for region (c1b74108) [Embedded Control] exfldio-0224 [15] Ex_read_field_datum : Region Embedded_control(3) has no handler ... etc. -- Alex Bligh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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