Comment 28 for bug 935778
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| Seth Forshee (sforshee) wrote Re: Toshiba R840 - brightness controls work on first boot, but do nothing after suspend/resume | #28 |
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1b1ed1a
(Get the code!)
So as I understand your comment the machine is locking up any time you try to write 0 or 1 to hci_backlight. Is that correct? If so, this isn't looking very promising.
Just fyi, the process of what happens when HCI_BACKLIGHT is written is completely opaque to us. The actual operations are handled by the computer's embedded controller, and we can't really see what it's doing. Writing 1 to HCI_BACKLIGHT has been reported to work on some machines, but if it turns out to be problematic on this one we may be stuck.