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<pre wrap="">On Wed, Dec 9, 2009 at 11:01 PM, Jarod Wilson <a
class="moz-txt-link-rfc2396E" href="mailto:jarod@wilsonet.com"><jarod@wilsonet.com></a> wrote:
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<pre wrap=""><span class="moz-txt-citetags">>> > </span>For some reason, this currently seems to be broken, and nobody has come up with a
<span class="moz-txt-citetags">>> ></span>fix yet. The lcdproc daemon can be configured to turn the display off, and it does turn it
<span class="moz-txt-citetags">>> ></span>off for a bit during shutdown, but the display lights back up as soon as the box finishes
<span class="moz-txt-citetags">>> > </span>powering off... So far as I know, we send the exact same display off packet sequence
<span class="moz-txt-citetags">>> ></span>as windows does, so I can't really explain it. My best guess is that maybe the imon driver
<span class="moz-txt-citetags">>> ></span>needs to be unloaded cleanly (modprobe -r), sending those display off commands in its
<span class="moz-txt-citetags">>> ></span>module_exit() routine, and then maybe it'll stay off, but its just a WAG. Not high on my
<span class="moz-txt-citetags">>> ></span>priority list to poke at it though, but I'd welcome any assistance in determining root cause
<span class="moz-txt-citetags">>> ></span>and a fix.
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<pre wrap=""><span class="moz-txt-citetags">>> </span>
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<pre wrap=""><span class="moz-txt-citetags">> </span>It's been a few years since I did my initial experiments with the LCD,
<span class="moz-txt-citetags">> </span>so I hope my memory is correct.
<span class="moz-txt-citetags">></span>
<span class="moz-txt-citetags">> </span>As I recall, you are correct that we do send the same data as windows
<span class="moz-txt-citetags">> </span>does. When I was testing, I did both monitoring from the windows side
<span class="moz-txt-citetags">> </span>using usb snoopy, and I installed windows in a virtualbox instance
<span class="moz-txt-citetags">> </span>running under linux and monitored what usb commands got passed through
<span class="moz-txt-citetags">> </span>to the hardware. I couldn't find any sort of command that we aren't
<span class="moz-txt-citetags">> </span>passing properly.
<span class="moz-txt-citetags">></span>
<span class="moz-txt-citetags">> </span>As far as your modprobe comment, I don't think that's it. I
<span class="moz-txt-citetags">> </span>experimented with writing a userspace driver for the device using
<span class="moz-txt-citetags">> </span>libusb and I got the same results. It seems unlikely to get the same
<span class="moz-txt-citetags">> </span>problem through 2 different interfaces, so I suspect it's something
<span class="moz-txt-citetags">> </span>lower level. My WAG has always been something like linux issuing a USB
<span class="moz-txt-citetags">> </span>bus reset on poweroff.
<span class="moz-txt-citetags">></span>
<span class="moz-txt-citetags">> </span>Anyway, it's annoying, but I learned to live with it....mostly because
<span class="moz-txt-citetags">> </span>my machine does suspend-to-ram, and for that the LCD actually stays
<span class="moz-txt-citetags">> </span>off.
<span class="moz-txt-citetags">></span>
<span class="moz-txt-citetags">> </span>Disclaimer: none of this is very fresh in my memory, so I hope I
<span class="moz-txt-citetags">> </span>didn't say something that was inaccurate. Also, I'm not a very
<span class="moz-txt-citetags">> </span>experience driver writer, so it's possible I completely screwed up in
<span class="moz-txt-citetags">> </span>my testing/debugging methodology. Take that for what it's worth.
<span class="moz-txt-citetags">> </span>
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<pre wrap="">Thanks alot I was hoping that it would be a one time lcd bios set it and
forget it fix but i guess not. thanks anyway
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