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[UNOFFICIAL][11] LineageOS 18.1 w/ microG patch for Pixel 4a (sunfish) (20210610)

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PeterCxy

Senior Member
Jul 15, 2013
296
859
Introduction

This is my personal build of LineageOS 18.1 for Pixel 4a with the microG patches applied. If you do not want / need to use microG, it may be a better idea to use the official build available here: https://download.lineageos.org/sunfish. This build is exactly the same as the official build except for the microG patch.

For discussion about the official build, please use the other thread instead: https://forum.xda-developers.com/t/rom-official-sunfish-lineageos-18-1.4255751/

Installation

Before installation, make sure your phone is updated to Android 11 firmware on both of the slots.

Whether you are installing the ROM for the first time or updating the ROM, please make sure you reboot to recovery again after `adb sideload`-ing the ROM before installing add-ons such as Magisk and GAPPS.

1. Download `boot-XXXX.img` (this contains the recovery needed for initial flashing)
2. Download `lineage-18.1-XXXX-UNOFFICIAL-petercxy-sunfish.zip`
3. Reboot your phone to fastboot mode
4. Run `fastboot flash boot boot-XXXX.img` from your PC
5. Reboot your phone into recovery mode (`fastboot reboot`, then press volume up immediately)
6. Erase data
7. Select Apply Update -> Apply Update from ADB
8. Run `adb sideload lineage-18.1-XXXX-UNOFFICIAL-petercxy-sunfish.zip` and wait for installation to finish
9. If you do not need to install any add-ons (e.g. Magisk or GAPPS), then just reboot into system
10. Otherwise, if you do need to install add-ons, reboot into recovery again (this puts your phone into the recovery of the newly-installed system), then install the add-ons using sideload. If you want to use GAPPS, they must be installed here before you boot into system for the first time (this doesn't apply to microG).
11. Enjoy

Updating

1. Download the newly released zip and reboot your phone into recovery
2. Select Apply Update -> Apply Update from ADB
3. Run `adb sideload lineage-18.1-XXXX-UNOFFICIAL-petercxy-sunfish.zip` and wait for installation to finish
4. If you did not have any add-ons installed before update (e.g. Magisk or GAPPS), then just reboot into system
5. Otherwise, if you did, you need to reboot into recovery again at this point before rebooting to system and re-flash every single one of the add-ons you had before. If you do not re-flash them before rebooting to the new system, the boot will fail and your phone will switch back to the old system automatically.
6. Reboot and enjoy.

Note: You don't need to update official firmware manually while LineageOS is installed by flashing latest official factory images. This LineageOS build now ships with latest official firmware updates which are tested to work with the ROM. Please avoid flashing the firmware manually while LineageOS is installed to avoid unnecessary issues.

Known Issues

- Use Magisk v21.4 or later if you want Magisk
- Some applications require microG to be installed in system partition to function, in which case you can consider using the Magisk microG module
- The eSIM manager only works with either GAPPS or microG installed. Without them, you can use eSIM, but you will not be able to add / remove / rename / disable your eSIM. The eSIM manager will also crash once or twice on first boot without GAPPS or microG, but after that it won't crash anymore (the system automatically disables it until you install microG or GMS)
- Disabling / Enabling eSIM may hang even with GAPPS or microG. However, rebooting normally fixes the issue and makes your action effective.
- I provide no guarantee for SafetyNet status or compatibility with any app that requires SafetyNet. Google has been tightening its SafetyNet verification and there is really not much we can do about it, and frankly most apps that require SafetyNet should not have done so in the first place. If you need SafetyNet, you are on your own.

Downloads

Note: This build has compatibility issues with MindTheGapps (just like the recent LineageOS weekly builds). It will be fixed in newer official weekly builds, but since this build is for microG users, I am not going to upload a new microG-patched build just to work around a GAPPS compatibility issue.
20210610: June 05 security update; sorry for the delay, LineageOS had some issues while merging this month's ASB.
This update also fixed some long-standing bugs, such as the initial crash dialog of the eSIM manager (when GAPPS or microG is not installed), and the extraneous battery percentage option in settings -> battery. Read the LineageOS changelog for the full update.
- boot-20210610.img: https://mega.nz/file/TVolEYKL#MrJH-AVk37JDc_iKCVJ2lFGgFLG9czrE4FnJokbjnqI
- lineage-18.1-20210610-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/uYw30SxT#CwWc0GwqMYoAT54TJqPK2U7M8Y3OzhbpPuvejkOB65o

20210507: May 05 security patches
- boot-20210507.img: https://mega.nz/file/rcJVHQYZ#KjFu84Wnqdx4Rq0fd6TZUlJuaD-RXFXmMCJM4V4z0Tc
- lineage-18.1-20210507-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/jYBTESqZ#ZRc7CkUt8aUYgZRLpF6S1_LHdUXwcUOKPsCBorcYZ1w

20210410: April 05 security patches
- boot-20210410.img: https://mega.nz/file/eYggCKba#l7QJUMkvyEBtyptVMmWVbXochJKmY__X4VIwTla1KqE
- lineage-18.1-20210410-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/bUpQhAQJ#uTe-2nHLKYsfFBKuJg0VAYISUCGMTbIpaC9qjEHFZ1c

20210308: March 05 security patches and official firmware / binary updates.
- boot-20210308.img: https://mega.nz/file/WIZxjAwA#P77ZdJ2YEed5WWmlijKcyRMLJ30KG36eL0mhQGjZWjI
- lineage-18.1-20210308-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/eRBTkYzC#iNZUA84XR80V1so7YvjQ7TyJuZKGY9BZf-MGRtgQOH8

20210222: Updated sources; Removed some non-functional LiveDisplay features; Switched to using Google's wifi_ext HAL; Reserved more space in system partitions for potentially larger GAPPS packages
- boot-20210222.img: https://mega.nz/file/KVxRDY6L#7l7oejw-XEd_m1BUdp0_Z2TyHVLE2KkaGQ6g7Op7dpk
- lineage-18.1-20210222-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/mUgzGSbC#88q95qVsI-7RJsecM8L2MHZ6EwNXrs54Xk6yi428rjU

20210207: Updated LineageOS source; Applied 2021-02-05 security patches; Added support for glove mode; Enabled support property for Google Assistant; Optimized vibration
- boot-20210207.img: https://mega.nz/file/aZxlDKgC#_9VR2ruCYUqmX8gLCBKX1KSMAsBYFDsLA6utk5EjB-g
- lineage-18.1-20210207-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/yZpFQQRJ#PZlNYzI2t2fZdf1T3v6pMRi1zJe7J26f-Eu_Pohm7p4

20200118: Updated LineageOS source; Attempted to fix GAPPS bootlooping issue
- boot-20210118.img: https://mega.nz/file/ONYSRLKC#FhRYEhfsBndqcrJrhd1F4Tv3uu3UZNDYnQe3EcrMyC0
- lineage-18.1-20210118-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/3VRgwZQQ#ynCPIDbW42hXvBWp8MoG-R9eEEzvnaQ649ULZM8lrAc

20210109: Updated LineageOS sources and updated build fingerprint to January.
- boot-20210109.img: https://mega.nz/file/qU5T2CLY#A7dkDfRS0gUaKzphT2_mm0IHW9_-3cIR76yvNV1Cs4A
- lineage-18.1-20210109-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/GNwyxb4S#UGHclk8p60QuRWrGl3LI-Hur9X_VKF46tBNfuD0Z9-o

20210107:
1) Synchronized LineageOS updates and AOSP Jan 5 security patch
2) The ROM now ships with latest official firmware, so you won't need to worry about updating firmware separately (you still need latest official firmware when installing the ROM for the first time though)
- boot-20210107.img: https://mega.nz/file/OYRnwaII#3Ipj99mG5tpXouRRKMqWDJmimH8U2q5mZ5LKj8ZEmdo
- lineage-18.1-20210107-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/aEBTFAwK#EM3fKYQG4Y2najLhRkZlPqDwPSwkV-yfsSlH7Za7UYM

20201229: Synchronized LineageOS updates and fixed biometric authentication (fingerprint) in third-party applications.
- boot-20201229.img: https://mega.nz/file/yMow3aDb#ByY4yG6LeAquqBd2vu2UnZUz2xukHYjWbIfXnlkT_XM
- lineage-18.1-20201229-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/SA5WDAZQ#fMRB9w4LLSxSAGxHOtEmN9gRBTmrnF8ozKawM34cIxU

20201227:
- boot-20201227.img: https://mega.nz/file/6cI3lKKK#p8Nq3jUOsOoPDeV6yPj4hQtXGIHu8-D54_g3gkzdi0w
- lineage-18.1-20201227-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/SdQnTaBa#83JjZojOS9JCRdYOng6Y0LLoUl8StAdrwsTbCSqAMhs

Sources

Device Tree: https://github.com/PeterCxy/android_device_google_sunfish
Kernel: https://github.com/PeterCxy/android_kernel_google_sunfish

Thanks: DirtyUnicorn sunfish contributors, SuperiorOS sunfish contributors, LineageOS coral contributors and the LineagOS community.
 
Last edited:

Edmontonchef

Senior Member
Nov 30, 2016
771
327
40
edmonton
After some trial and error I got it up and running. After booting the ROM I returned to recovery, factory reset then side loaded Razorloves micro gapps.
Thanks for the build
 

xeropressence

Senior Member
Apr 13, 2018
50
10
Gave this a shot, everything seemed to loadup fine. Wasn't able to get call screen to show up tho, I flashed razorloves gapps, anything to do to get that to work?
 

PeterCxy

Senior Member
Jul 15, 2013
296
859
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PeterCxy

Senior Member
Jul 15, 2013
296
859
Gave this a shot, everything seemed to loadup fine. Wasn't able to get call screen to show up tho, I flashed razorloves gapps, anything to do to get that to work?

Unfortunately I have zero clue about this, and I don't live somewhere Call Screening is supported in the first place. This would probably need to be figured out by someone other than me :/
 

PeterCxy

Senior Member
Jul 15, 2013
296
859
This is amazing, thanks @PeterCxy

Where the instructions state to be on A11 on both slots does that mean I can do a flash-all with the latest A11 factory image? Currently on LOS 17

Yes you can, but that flash-all script only flashes it on one slot, so to guarantee you have A11 on both slots you'd still need to manually switch the slot and execute that script a second time. The reason why you need A11 on both slots is that the recovery installs the new ROM to the inactive slot, so if the inactive slot is not also on A11, the ROM will probably not boot properly.
 
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EggZenBeanz

Senior Member
Jul 21, 2005
286
92
Yes you can, but that flash-all script only flashes it on one slot, so to guarantee you have A11 on both slots you'd still need to manually switch the slot and execute that script a second time. The reason why you need A11 on both slots is that the recovery installs the new ROM to the inactive slot, so if the inactive slot is not also on A11, the ROM will probably not boot properly.

Thank you
 

EggZenBeanz

Senior Member
Jul 21, 2005
286
92
Thank you very much @PeterCxy

I flash-all latest december 11 images and --set-active= slot to other partition and re flashed again. Following the instructions I now have LOS18 with micro-g running. Awesome! I would be interested in any builds with micro-g patches even when/if sunfish goes official LOS
 
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EggZenBeanz

Senior Member
Jul 21, 2005
286
92
Biometric/fingerprint unlock is not available in any apps like Bitwarden, wirex etc. Has this feature been removed in A11?

I have a working fingerprint and pattern unlock working on the phone, just no options in any usual apps
 

jawz101

Senior Member
Biometric/fingerprint unlock is not available in any apps like Bitwarden, wirex etc. Has this feature been removed in A11?

I have a working fingerprint and pattern unlock working on the phone, just no options in any usual apps

Do you have Play Services on it? I assume they use the Biometric API for that feature. And I assume that requires Play Services. Or a locked bootloader, some Trust Zone thing... basically it probably isn't designed to work on a ROM that doesn't have some integrity check or secure thingy access.
info:

 

EggZenBeanz

Senior Member
Jul 21, 2005
286
92
Do you have Play Services on it? I assume they use the Biometric API for that feature. And I assume that requires Play Services. Or a locked bootloader, some Trust Zone thing... basically it probably isn't designed to work on a ROM that doesn't have some integrity check or secure thingy access.
info:


I don't use play services, but biometric unlock like autofill I think doesn't rely on play services, its part of AOSP? Both my Tab S5e and previous pixel 4a builds were LOS17 with no google services or microg installed and I have Biometric support in all usual apps
 
Last edited:
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lapper

Member
Nov 27, 2017
35
8
Do you have Play Services on it? I assume they use the Biometric API for that feature. And I assume that requires Play Services. Or a locked bootloader, some Trust Zone thing... basically it probably isn't designed to work on a ROM that doesn't have some integrity check or secure thingy access.
info:


I noticed the same issue with bitwarden, never had this issue before
 

PeterCxy

Senior Member
Jul 15, 2013
296
859
Biometric/fingerprint unlock is not available in any apps like Bitwarden, wirex etc. Has this feature been removed in A11?

I have a working fingerprint and pattern unlock working on the phone, just no options in any usual apps

hmmm it's also not available in my Keepass2Android. I'll look into this later -- I don't think fingerprint support is part of Play Services.
 

PeterCxy

Senior Member
Jul 15, 2013
296
859
Biometric/fingerprint unlock is not available in any apps like Bitwarden, wirex etc. Has this feature been removed in A11?

I have a working fingerprint and pattern unlock working on the phone, just no options in any usual apps

It might be an issue with the LineageOS source tree when I last synchronized. I checked some of my other devices with LOS built on the same date and they all don't have the fingerprint option available in apps.
 
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Reactions: EggZenBeanz

lapper

Member
Nov 27, 2017
35
8
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  • 26
    Introduction

    This is my personal build of LineageOS 18.1 for Pixel 4a with the microG patches applied. If you do not want / need to use microG, it may be a better idea to use the official build available here: https://download.lineageos.org/sunfish. This build is exactly the same as the official build except for the microG patch.

    For discussion about the official build, please use the other thread instead: https://forum.xda-developers.com/t/rom-official-sunfish-lineageos-18-1.4255751/

    Installation

    Before installation, make sure your phone is updated to Android 11 firmware on both of the slots.

    Whether you are installing the ROM for the first time or updating the ROM, please make sure you reboot to recovery again after `adb sideload`-ing the ROM before installing add-ons such as Magisk and GAPPS.

    1. Download `boot-XXXX.img` (this contains the recovery needed for initial flashing)
    2. Download `lineage-18.1-XXXX-UNOFFICIAL-petercxy-sunfish.zip`
    3. Reboot your phone to fastboot mode
    4. Run `fastboot flash boot boot-XXXX.img` from your PC
    5. Reboot your phone into recovery mode (`fastboot reboot`, then press volume up immediately)
    6. Erase data
    7. Select Apply Update -> Apply Update from ADB
    8. Run `adb sideload lineage-18.1-XXXX-UNOFFICIAL-petercxy-sunfish.zip` and wait for installation to finish
    9. If you do not need to install any add-ons (e.g. Magisk or GAPPS), then just reboot into system
    10. Otherwise, if you do need to install add-ons, reboot into recovery again (this puts your phone into the recovery of the newly-installed system), then install the add-ons using sideload. If you want to use GAPPS, they must be installed here before you boot into system for the first time (this doesn't apply to microG).
    11. Enjoy

    Updating

    1. Download the newly released zip and reboot your phone into recovery
    2. Select Apply Update -> Apply Update from ADB
    3. Run `adb sideload lineage-18.1-XXXX-UNOFFICIAL-petercxy-sunfish.zip` and wait for installation to finish
    4. If you did not have any add-ons installed before update (e.g. Magisk or GAPPS), then just reboot into system
    5. Otherwise, if you did, you need to reboot into recovery again at this point before rebooting to system and re-flash every single one of the add-ons you had before. If you do not re-flash them before rebooting to the new system, the boot will fail and your phone will switch back to the old system automatically.
    6. Reboot and enjoy.

    Note: You don't need to update official firmware manually while LineageOS is installed by flashing latest official factory images. This LineageOS build now ships with latest official firmware updates which are tested to work with the ROM. Please avoid flashing the firmware manually while LineageOS is installed to avoid unnecessary issues.

    Known Issues

    - Use Magisk v21.4 or later if you want Magisk
    - Some applications require microG to be installed in system partition to function, in which case you can consider using the Magisk microG module
    - The eSIM manager only works with either GAPPS or microG installed. Without them, you can use eSIM, but you will not be able to add / remove / rename / disable your eSIM. The eSIM manager will also crash once or twice on first boot without GAPPS or microG, but after that it won't crash anymore (the system automatically disables it until you install microG or GMS)
    - Disabling / Enabling eSIM may hang even with GAPPS or microG. However, rebooting normally fixes the issue and makes your action effective.
    - I provide no guarantee for SafetyNet status or compatibility with any app that requires SafetyNet. Google has been tightening its SafetyNet verification and there is really not much we can do about it, and frankly most apps that require SafetyNet should not have done so in the first place. If you need SafetyNet, you are on your own.

    Downloads

    Note: This build has compatibility issues with MindTheGapps (just like the recent LineageOS weekly builds). It will be fixed in newer official weekly builds, but since this build is for microG users, I am not going to upload a new microG-patched build just to work around a GAPPS compatibility issue.
    20210610: June 05 security update; sorry for the delay, LineageOS had some issues while merging this month's ASB.
    This update also fixed some long-standing bugs, such as the initial crash dialog of the eSIM manager (when GAPPS or microG is not installed), and the extraneous battery percentage option in settings -> battery. Read the LineageOS changelog for the full update.
    - boot-20210610.img: https://mega.nz/file/TVolEYKL#MrJH-AVk37JDc_iKCVJ2lFGgFLG9czrE4FnJokbjnqI
    - lineage-18.1-20210610-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/uYw30SxT#CwWc0GwqMYoAT54TJqPK2U7M8Y3OzhbpPuvejkOB65o

    20210507: May 05 security patches
    - boot-20210507.img: https://mega.nz/file/rcJVHQYZ#KjFu84Wnqdx4Rq0fd6TZUlJuaD-RXFXmMCJM4V4z0Tc
    - lineage-18.1-20210507-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/jYBTESqZ#ZRc7CkUt8aUYgZRLpF6S1_LHdUXwcUOKPsCBorcYZ1w

    20210410: April 05 security patches
    - boot-20210410.img: https://mega.nz/file/eYggCKba#l7QJUMkvyEBtyptVMmWVbXochJKmY__X4VIwTla1KqE
    - lineage-18.1-20210410-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/bUpQhAQJ#uTe-2nHLKYsfFBKuJg0VAYISUCGMTbIpaC9qjEHFZ1c

    20210308: March 05 security patches and official firmware / binary updates.
    - boot-20210308.img: https://mega.nz/file/WIZxjAwA#P77ZdJ2YEed5WWmlijKcyRMLJ30KG36eL0mhQGjZWjI
    - lineage-18.1-20210308-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/eRBTkYzC#iNZUA84XR80V1so7YvjQ7TyJuZKGY9BZf-MGRtgQOH8

    20210222: Updated sources; Removed some non-functional LiveDisplay features; Switched to using Google's wifi_ext HAL; Reserved more space in system partitions for potentially larger GAPPS packages
    - boot-20210222.img: https://mega.nz/file/KVxRDY6L#7l7oejw-XEd_m1BUdp0_Z2TyHVLE2KkaGQ6g7Op7dpk
    - lineage-18.1-20210222-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/mUgzGSbC#88q95qVsI-7RJsecM8L2MHZ6EwNXrs54Xk6yi428rjU

    20210207: Updated LineageOS source; Applied 2021-02-05 security patches; Added support for glove mode; Enabled support property for Google Assistant; Optimized vibration
    - boot-20210207.img: https://mega.nz/file/aZxlDKgC#_9VR2ruCYUqmX8gLCBKX1KSMAsBYFDsLA6utk5EjB-g
    - lineage-18.1-20210207-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/yZpFQQRJ#PZlNYzI2t2fZdf1T3v6pMRi1zJe7J26f-Eu_Pohm7p4

    20200118: Updated LineageOS source; Attempted to fix GAPPS bootlooping issue
    - boot-20210118.img: https://mega.nz/file/ONYSRLKC#FhRYEhfsBndqcrJrhd1F4Tv3uu3UZNDYnQe3EcrMyC0
    - lineage-18.1-20210118-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/3VRgwZQQ#ynCPIDbW42hXvBWp8MoG-R9eEEzvnaQ649ULZM8lrAc

    20210109: Updated LineageOS sources and updated build fingerprint to January.
    - boot-20210109.img: https://mega.nz/file/qU5T2CLY#A7dkDfRS0gUaKzphT2_mm0IHW9_-3cIR76yvNV1Cs4A
    - lineage-18.1-20210109-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/GNwyxb4S#UGHclk8p60QuRWrGl3LI-Hur9X_VKF46tBNfuD0Z9-o

    20210107:
    1) Synchronized LineageOS updates and AOSP Jan 5 security patch
    2) The ROM now ships with latest official firmware, so you won't need to worry about updating firmware separately (you still need latest official firmware when installing the ROM for the first time though)
    - boot-20210107.img: https://mega.nz/file/OYRnwaII#3Ipj99mG5tpXouRRKMqWDJmimH8U2q5mZ5LKj8ZEmdo
    - lineage-18.1-20210107-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/aEBTFAwK#EM3fKYQG4Y2najLhRkZlPqDwPSwkV-yfsSlH7Za7UYM

    20201229: Synchronized LineageOS updates and fixed biometric authentication (fingerprint) in third-party applications.
    - boot-20201229.img: https://mega.nz/file/yMow3aDb#ByY4yG6LeAquqBd2vu2UnZUz2xukHYjWbIfXnlkT_XM
    - lineage-18.1-20201229-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/SA5WDAZQ#fMRB9w4LLSxSAGxHOtEmN9gRBTmrnF8ozKawM34cIxU

    20201227:
    - boot-20201227.img: https://mega.nz/file/6cI3lKKK#p8Nq3jUOsOoPDeV6yPj4hQtXGIHu8-D54_g3gkzdi0w
    - lineage-18.1-20201227-UNOFFICIAL-petercxy-sunfish.zip: https://mega.nz/file/SdQnTaBa#83JjZojOS9JCRdYOng6Y0LLoUl8StAdrwsTbCSqAMhs

    Sources

    Device Tree: https://github.com/PeterCxy/android_device_google_sunfish
    Kernel: https://github.com/PeterCxy/android_kernel_google_sunfish

    Thanks: DirtyUnicorn sunfish contributors, SuperiorOS sunfish contributors, LineageOS coral contributors and the LineagOS community.
    12
    Updated to 20210222
    10
    Updated to 20210207 with fresh 2021-02-05 security patches. Also removed warnings about GAPPS because they should be working now.
    8
    Thanks for all your work! I am hesitating to switch from stock 11 for several reasons. One is whether we will be able to update from this build to an official one without wiping/reinstalling. Another is whether the build is completely stable and usable as a daily driver. Also, I am wondering about battery life and latency as compared to stock. I have found that on certain devices, Lineage was actually worse! Also, how are the opengapps working for people??

    Summary of questions:
    1. Stability?
    2. Battery?
    3. Is official coming soon and "guaranteed"?
    4. Can we seemlessly upgrade to official 18.1?
    5. Opengapps or other gapps working well?

    Thanks to everyone for any input!

    1 & 2: I've been daily driving this for quite a while and I don't think it's less stable than stock, and I don't think I've observed any more battery drain than stock. Of course this could be due to the fact that I don't install the full GAPPS and instead use microG.

    3: I am going to merge all my code into the LineageOS repository by the end of this week if no objections (I am already a maintainer of the official LineageOS repositories for Pixel 4a) and I will be submitting wiki entries & CI config for LineageOS 18.1 builds. I am not sure when LineageOS 18.1 will ship, but I expect it to ship with Pixel 4a builds, or in the worst case Pixel 4a builds will be up shortly after LineageOS 18.1 is shipped.

    4: No, you will not be able to. This ROM is signed with my own keys, and I have no access (nor should I have access) to the official LineageOS signing keys. It will not be compatible with official builds for this reason.

    5: As I don't use GAPPS myself, I'm not sure, but people in this thread have been successfully using GAPPS with this build for some time now. We at LineageOS have fixed the earlier issue causing GAPPS to break on new Pixel devices.
    6
    Updated to 20210107