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Old 12-10-2013, 06:34 PM   #1
BurningOrange
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Default 7.5M0 bug: breaks Miracast cloning mode and excessive drain on connected standby.

Although the 7.5M0 drivers are nice and fast on my Dell Venue 8 Pro, I just discovered a couple of bugs. With the drivers installed: miracasting to a wireless display does not work in cloning (mirroring) mode. All other modes work fine. There is also an excessive power drain during connected standby. The powercfg /sleepstudy says that it is due to the Intel Graphics not shutting down properly. Once I uninstall the Displaylink driver, everything returns to normal, Miracast cloning works and connected standby has a very low power drain.

Hope you will be able to resolve this, thanks.
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Old 12-11-2013, 12:05 PM   #2
JamesH
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Hi,

The connected standby issue is being investigated.

Can you attach logs for the miracast issue? What make and model receiver are you using?

Thanks,
James
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Old 12-12-2013, 02:36 AM   #3
BurningOrange
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I am using the Netgear Push2TV PVT3000 adapter. The debug log is attached here. The Displaylink adapters were not connected when I took the log, only Miracast was operating in extended desktop mode.

Thanks for looking into this matter.
Attached Files
File Type: zip SETT-VENUE8PRO_20131211_193118.zip (622.3 KB, 1 views)
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Old 12-12-2013, 11:24 AM   #4
JamesH
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Hi,

I'll try and reproduce this - can you please attach the logs with Miracast set to mirror?

Thanks,
James
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Old 12-12-2013, 04:02 PM   #5
BurningOrange
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Well, that's the whole point. It doesn't go into mirror mode. I click on "Duplicate" in the charms and nothing happens. If I click on "Clone" via the Intel Graphics menu or options panel, nothing happens.
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Old 12-16-2013, 09:53 PM   #6
BurningOrange
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Hi JamesH, have you managed to replicate the Miracast mirroring bug ?
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Old 12-20-2013, 12:32 PM   #7
JamesH
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Hi,

Not yet on the system we have- I've raised this internally for further investigation.

Thanks,
James
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Old 12-26-2013, 03:46 PM   #8
BillATS
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BurningOrange -
Was wondering if you could confirm, did clone mode work with 7.4 drivers and only recently broke with 7.5? I am experiencing the same problem, but I've only ever had the 7.5 update installed. If 7.4 worked with cloning and you were able to mirror screen, I was considering finding a way to go down to that.
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Old 12-28-2013, 12:02 AM   #9
JamesH
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Quote:
Originally Posted by BurningOrange View Post
Hi JamesH, have you managed to replicate the Miracast mirroring bug ?
Hi,

After a lot of faff, I've finally managed to get Miracast working (extend & clone) on the Belkin ScreenCast that I have. Will report back on how I get on with this and the Dell Venue 8 Pro next week.

Thanks,
James
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Old 12-30-2013, 07:59 PM   #10
BurningOrange
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BillATS, that's a good point. No, I have not tried it with the 7.4 drivers, only with the 7.5M0 drivers. I'll give that a go.

JamesH: I'm looking forward to seeing what your results are. Miracast is probably not ready for prime-time yet, I find it a bit fussy about connecting 5.1audio, and it crashes the Wifi card upon disconnection. But I think that may be a Dell Venue 8 Pro problem because the crashes also happens with bluetooth too (nothing to do with Displaylink).
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