[PATCH] drm/i915: fix failure to power off after hibernate

[Bjørn Mork]

Ville Syrjälä <ville.syrjala at linux.intel.com> writes:

>> @@ -651,7 +651,14 @@ static int i915_drm_suspend_late(struct drm_device *drm_dev)
>>  	}
>>  
>>  	pci_disable_device(drm_dev->pdev);
>> -	pci_set_power_state(drm_dev->pdev, PCI_D3hot);
>> +	/*
>> +	 * During hibernation on some GM45 platforms the BIOS may try to access
>> +	 * the device even though it's already in D3 and hang the machine. So
>> +	 * leave the device in D0 on those platforms and hope the BIOS will
>> +	 * power down the device properly.
>
> Please include the model of the known bad machine in this comment, to
> help future archaeologists.

Here are some details:

bjorn at nemi:~$ grep . /sys/class/dmi/id/{bios,product}* 2>/dev/null 
/sys/class/dmi/id/bios_date:12/19/2011
/sys/class/dmi/id/bios_vendor:LENOVO
/sys/class/dmi/id/bios_version:6EET55WW (3.15 )
/sys/class/dmi/id/product_name:2776LEG
/sys/class/dmi/id/product_version:ThinkPad X301

Please let me know if you need some other data.


Bjørn