[ROM] [13.0] [Dragon] LineageOS 20.0 [UNOFFICIAL]

[primaleph]

Installed Magisk and now my tablet won't charge. Removing Magisk didn't help.

...and I bricked the tablet trying to fix this. Couldn't restore the stock image, so tried erasing all partitions... including the bootloader. Didn't realize until afterwards what this would do. FML.

Why the hell is this even an accessible command? Is there any benefit to being able to erase a bootloader when you could just flash it instead?

 

[michie]

No fastboot? Try some of the unbricking guides.

 

[tabormeister]

Sounds like you need a new pixel c

Considering it, but they've gotten expensive recently!

 

[pat_wild]

There are mixed experiences for bluetooth keyboard & wifi country code switch.

For the keyboard I understand that this has been going on from previous Android versions already. Updating the bluetooth driver in our kernel is a hel lot of work and not worth it if it's only a problem with the keyboard. Other bluetooth devices work perfectly fine.

Is the wifi country code switcher working?

I confirm that the wifi switcher works for me (as well as the keyboard). It's amazing what you managed to do! Thank you!!

Regarding Bluetooth, I noticed that when I connect wireless earbuds, the sound is choppy. However, I experienced that same behaviour on other ROM and on other "low end" tablets, so I assume it has to do with memory management. I read somewhere that turning off wifi could resolve the issue but that's not very practical when you are streaming something. But, this isn't a huge issue for me: simply need to plugin the good old wired earphones!

 

[aleksuperior]

Is the wifi country code switcher working?

The WiFi country code sticks after reboot, nevertheless, the tablet is not seeing any 5GHz networks - no matter which region is selected.

 

[EnginEAR]

Considering it, but they've gotten expensive recently!

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[primaleph]

No fastboot? Try some of the unbricking guides.

I did, with no success. Still couldn't flash anything after trying them. And the Pixel C I ordered to replace the other one has working stock software, but its fastboot is messed up too. I was able to install stock updates, but fastboot flash and fastboot boot commands don't work. It seems to be partially unlocked, which is hard to fix from what I've read.

 

[primaleph]

I did, with no success. Still couldn't flash anything after trying them. And the Pixel C I ordered to replace the other one has working stock software, but its fastboot is messed up too. I was able to install stock updates, but fastboot flash and fastboot boot commands don't work. It seems to be partially unlocked, which is hard to fix from what I've read.

Happy to report that the replacement Pixel C arrived. After some initial difficulty flashing anything on it - it was stuck in a partially unlocked state - I was able to get the most recent version of this rom onto it. It's working great. Thank you so much for your hard work.

 

[tabormeister]

I confirm that the wifi switcher works for me (as well as the keyboard). It's amazing what you managed to do! Thank you!!

Regarding Bluetooth, I noticed that when I connect wireless earbuds, the sound is choppy. However, I experienced that same behaviour on other ROM and on other "low end" tablets, so I assume it has to do with memory management. I read somewhere that turning off wifi could resolve the issue but that's not very practical when you are streaming something. But, this isn't a huge issue for me: simply need to plugin the good old wired earphones!

Weird, my pixel buds work perfectly

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Find many great new & used options and get the best deals for Google Pixel C 64GB, Wi-Fi, 10.2inch - Silver at the best online prices at eBay! Free shipping for many products!

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Also I take it back - seems like $100 for 32gb, $150 for 64gb. In this day and age 64gb seems like the minimum to have like more than 10 apps and a couple games installed. Is the 64gb faster?

 

[primaleph]

Is there somewhere I can read about how the Application Compatibility settings work, in Developer Options? There are so many of them, and I'm not sure what all of them do.

 

[ragwo]

Is the wifi country code switcher working?

Working like a charm, thanks a lot!

 

[pat_wild]

Weird, my pixel buds work perfectly

Turns out that it now works perfectly for me as well. I hadn't tried them with the latest version, assuming it would still do the same as before. I was obviously wrong.

So, with that said, everything works perfectly for me!

 

[michie]

Is there somewhere I can read about how the Application Compatibility settings work, in Developer Options? There are so many of them, and I'm not sure what all of them do.

What do you mean exactly?

 

[michie]

It's itching to build both Lineage & Pixel Experience for dragon. What do you guys think? Performance should be equal

 

[primaleph]

What do you mean exactly?

In the Settings app, under Feature Flags, there are two settings that I've been experimenting with: Graphics Driver Preferences and App Compatibility Changes.

Some games only work when I change their graphics driver from Default to System Graphics Driver. So I assumed the system driver is a patched version of the original nVidia one. I recall people were trying to figure out how to do that, back when I still had a Shield tablet. I guess someone eventually figured it out, which is awesome.

Under App Compatibility Changes, you'll see there are a wide variety of options can be changed, grouped by SDK version. I'm trying to get a sense of what the oldest ones do, so that I can try some of them on a particular old game that doesn't get past its opening video with either graphics driver.

 

[Pian0Play0r]

I've migrated from ArrowOS to LineageOS 20 and am very happy with how it works for now Pixel Keyboard works as well as it did with ArrowOS and Bluetooth headphones seem work as well. Awesome Job michie!

 

[tabormeister]

It's itching to build both Lineage & Pixel Experience for dragon. What do you guys think? Performance should be equal

You're a madman! If performance is the same I definitely prefer pixel experience, but maybe not for everyone

 

[pat_wild]

It's itching to build both Lineage & Pixel Experience for dragon. What do you guys think? Performance should be equal

Interesting! Well, if you can make it work as well as this ROM, I too would probably flip to Pixel Experience!

You amaze me! Making one ROM work so well for our tablets is already a freaking great achievement (technically, you also did your magic on Arrow as well), but to take on yet another project: respect!

Quick question. At some point, you mentioned that you might even be able to re-enable the cameras. Is that still in the cards? (Or maybe I dreamed that! Lol)

 

[michie]

Interesting! Well, if you can make it work as well as this ROM, I too would probably flip to Pixel Experience!

You amaze me! Making one ROM work so well for our tablets is already a freaking great achievement (technically, you also did your magic on Arrow as well), but to take on yet another project: respect!

Quick question. At some point, you mentioned that you might even be able to re-enable the cameras. Is that still in the cards? (Or maybe I dreamed that! Lol)

Well, I was able to get the camera's detected again by the system but the old hacks in the android framework don't seem to work anymore. Ive been spending alot of time getting the codecs working again in webview browsers but even if I build webview myself without hardware support, video's still wont load in the browsers. Not sure why...

I did not spend much time on the camera's yet. Will try some stuff soon!

 

[primaleph]

Some performance optimization suggestions from my last day or so experimenting with settings. These seem to matter the most for speeding up browsers and games. The following settings have mostly eliminated the remaining issues with lag on my Pixel C:

CPU governor - interactive

I/O scheduler - deadline or fiops
Read-ahead - 512kb or 1024kb

Maybe not strictly necessary, but I did it anyway:
Entropy (read) - 1024kb
Entropy (write) - 2048kb

Judging from what happened when I tried changing them, it seems best to leave the CPU minimum frequency and ZRAM settings as they are. I've been experimenting with these settings using Smartpack, installed from F-Droid.

I hope these are helpful. I'm not a programmer, but I have a good bit of experience with tech support and beta testing, so I'm glad to be able to contribute something to the ongoing efforts to keep this tablet relevant. (And it really is!) If you find another setting that improves the operation of your Pixel C with LineageOS 20, let us all know about it