Problems with an unlocked bootloader Z4

[begalund]

So I purchased a Z4 SGP771 to use as both a laptop and phone replacement. Works wonderfully for me; although the KB is a bit small for continuous use, it's fine for my purposes.

However, I got overeager and went through the steps to unlock the bootloader in anticipation of rooting the device (which I haven't yet done) and now I've got some issues I'm hoping the good people here can help with.

1. I'm still running the original stock rom it shipped with: 5.0.2
2. I can't get screen mirroring with miracast to work with my bravia tv - specifically I get an error saying that the TV doesn't support HDCP. On the sony support forums, they specifically mention unlocking the bootloader being an issue here. And yes, the TV in question is Wi-Di capable. The tablet can see it, and the TV even has a built in mirroring input setting - the tablet just fails to make the connection.
3. I was able to get remote play to work with my PS4 briefly - it displayed on my Z4's screen very nicely. Now however, I can't get it to do anything but display a grey screen with on-screen controls (like the tablet is being used as a large and clumsy dual-shock controller). To be honest, I cannot remember if the remote play feature was working after I unlocked or not. RL work became very busy and I was unable to take advantage of the remote play option for several days. When I got back to it, it just wasn't working.

Generally speaking, everything else is still running fine. I believe I can fix #1 on my own, but I'm baffled on #2 and #3 without sending it back to Sony for a true repair/relock.

So anybody got any suggestions?

 

[begalund]

2. I can't get screen mirroring with miracast to work with my bravia tv - specifically I get an error saying that the TV doesn't support HDCP. On the sony support forums, they specifically mention unlocking the bootloader being an issue here. And yes, the TV in question is Wi-Di capable. The tablet can see it, and the TV even has a built in mirroring input setting - the tablet just fails to make the connection.
3. I was able to get remote play to work with my PS4 briefly - it displayed on my Z4's screen very nicely. Now however, I can't get it to do anything but display a grey screen with on-screen controls (like the tablet is being used as a large and clumsy dual-shock controller).

So a bit of an update is in order. After checking in with Sony directly - just a query on their "if you return it for service you may be charged a significant fee, since you've modified the tablet" quote - and they informed me that "yeah, you can't return it at all, sorry no dice, thanks for playing." I went ahead and at least did a full system backup and reboot.

Surprise, surprise, Remote Play works again. I've got significant lag over my router, but I think that's a function of the router, not anything to do with the tablet. So #3 just up and fixed itself. Yay for that.

Screen mirroring is still fubar however. This ultimately isn't a major issue since it isn't something we were aiming to do very often anyway. We only attempted it during a recent soccer game broadcast that wasn't being carried on any of the stations I subscribe to through my cable provider, but was available streaming. So #2 isn't fixed yet, and that does seem to be a direct result of unlocking. I can live with it, but finding a solution would be preferable.

 

[gbil]

So a bit of an update is in order. After checking in with Sony directly - just a query on their "if you return it for service you may be charged a significant fee, since you've modified the tablet" quote - and they informed me that "yeah, you can't return it at all, sorry no dice, thanks for playing." I went ahead and at least did a full system backup and reboot.

Surprise, surprise, Remote Play works again. I've got significant lag over my router, but I think that's a function of the router, not anything to do with the tablet. So #3 just up and fixed itself. Yay for that.

Screen mirroring is still fubar however. This ultimately isn't a major issue since it isn't something we were aiming to do very often anyway. We only attempted it during a recent soccer game broadcast that wasn't being carried on any of the stations I subscribe to through my cable provider, but was available streaming. So #2 isn't fixed yet, and that does seem to be a direct result of unlocking. I can live with it, but finding a solution would be preferable.

Yes miracast will fail if you unlock.

At least for test devices it is possible to enable it again afterwards but I don't know about retail ones. In any case I'm pretty sure you can't do it via EMMA so I don't think simple Sony service points can do that.

I'll try to find out.

 

[Mr. Schnabel]

http://forum.xda-developers.com/xperia-z2/help/fix-hdcp-error-miracast-ezcast-screen-t3123560

... helped me with the miracast problem! Addedt the Values in /system/etc/wfdconfig.xml and build.prop, ran terminal command as in post #6 and voila .... screen mirroring is working on my samsung f6500

Hope it helps ....

Cheers

 

[AndroPlus]

Yes miracast will fail if you unlock.

At least for test devices it is possible to enable it again afterwards but I don't know about retail ones. In any case I'm pretty sure you can't do it via EMMA so I don't think simple Sony service points can do that.

I'll try to find out.

How does it work on test device?
If it is differ from above link's fix, it's really interesting.

 

[gbil]

How does it work on test device?
If it is differ from above link's fix, it's really interesting.

If I remember correctly it changed something in the TA partition with an internal tool SONY Mobile has.

But that was quite some time ago - a couple of years.