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【迟来的更新】【T20体验版8.1固件发布】

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201715

台电管理员 管理员 发表于 2019-4-23 10:48:30 | 显示全部楼层 |阅读
要来的还是回来的,只是有些许迟到。
今天这里要发布的是T20体验版本的安卓8.1固件。


——————————【体验版】【体验版】【体验版】——————————


已知bug:
1.相机功能大几率失效:表现为相机功能有很大几率无法调用摄像头,只有极个别时候能正常调用使用;该bug影响到所有需要使用摄像头功能的app;该bug正在修复。
2.此版本未更换显示驱动程序和接口参数:因此固有屏幕显示刷新会出现刷新裂屏的情况并未改善;后续版本将会替换驱动以改善该情况。
3.部分T20在原版固件中能实现双卡双待功能的,在体验版中则只能保证单卡功能正常有效,未实测双卡效果;此为谷歌认证限制原因导致,希望正式版能够解决并实现(无法保证)。
4.该版本修改了CPU性能调度策略,大核心的运行策略更为积极,改善触控反馈和app响应体验;负面是,相比目前版本固件,主观发热有所提高,电池续航有所降低;此策略问题欢迎体验用户积极反馈,以便后续固件相关调度策略的调整(暂不开发多策略用户可选调控功能,该开发需时较长)。


由于是体验版本,刷机过程较正常更新更为繁琐,因此必须按照以下教程内容进行刷机,否则会出现4G功能失效的情况。
如不按教程刷机出现“掉4G”情况,需要先刷回目前正常的安卓7版本固件后,再次按教程刷机8.1才能正常;仅重新刷8.1仍会无效。因此切记按照下述教程刷机。


【切记按照下述教程刷机】


【切记按照下述教程刷机】


【切记按照下述教程刷机】







下载刷机包后,解压。
打开刷机软件,点击配置文件右边的choose,选中T20_T2E1-images-v1.00_20190312user-->images-->MT6797_Android_scatter.txt,如下图
bdb779cb0a46f21f64599a05f8246b600d33aef1.jpg

选择完固件之后发现有两个文件没有被勾选,此时需要手动勾选文件,点击右边路劲(下图标识位置)选择固件包里面的mdrom1和mdrom3。
571057fbb2fb4316a076be2c2ea4462308f7d3fd.jpg

3f86b0fb43166d22811ed1c2482309f79152d2fd.jpg
d88641166d224f4aeff0b74507f790529922d1fd.jpg
当mdrom1和mdrom3路径选完之后,将下载选项改为【固件升级】(验证文件下一行),点击【下载】,将T20平板关机后,接上数据线,刷机过程和正常刷机无异。
0d74cb3d70cf3bc7cb4f0bbadf00baa1cc112a92.jpg

daf0x 一级台风 发表于 2019-4-24 14:42:50 | 显示全部楼层
Hi, this sounds really promising, so first of all I'd like to thank you for actually following through and making an update to Android 8.1. Thank you!

I'd like to try this out, but I have a few questions/remarks.

First, I'm having trouble finding the download for this. I looked on teclast.com/tools/pad/pad.php, but there are no new downloads for either the T2E1 nor the T2E2. Where can we find the download?

Also, in your post you mention the T2E1 version of this firmware, but not the T2E2. Is there a difference, or do they use the same firmware? If not, will a beta be made available for the T2E2 as well?

I would further like to request that you do not upload this on Baidu, but please use another file host like Microsoft One Drive, Google Drive, Mega Upload, MediaFire, etc. The reason is that it is impossible to download something from Baidu for non-Chinese people. This holds also for the existing firmwares on teclast.com/tools/pad/pad.php. Please make them available for your foreign customers too!

As for your question in point 4, personally I don't have a problem with the touch responsiveness on my device (T2E2), so my vote would be to keep the longer battery life rather than the higher performance.



(Google translation)

嗨,这听起来很有前途,所以首先我要感谢你实际跟进并对Android 8.1进行更新。谢谢!

我想尝试一下,但我有几个问题/评论。

首先,我无法为此找到下载。我查看了teclast.com/tools/pad/pad.php,但T2E1和T2E2都没有新的下载。我们在哪里可以找到下载?

另外,在你的帖子中你提到了这个固件的T2E1版本,但没有提到T2E2。有区别,还是使用相同的固件?如果没有,是否也可以为T2E2提供测试版?

我还想请求您不要在百度上传这个,但请使用其他文件主机,如Microsoft One Drive,Google Drive,Mega Upload,MediaFire等。原因是无法从百度下载非 - 中国人。这也适用于teclast.com/tools/pad/pad.php上的现有固件。请将它们也提供给您的外国客户!

至于你在第4点的问题,我个人对我的设备(T2E2)的触摸响应没有问题,所以我的投票是保持更长的电池寿命而不是更高的性能。


点评

replace * to . and replace @ to / before use it.  发表于 2019-4-29 08:16
Here is baidu disk link for 8.1 ROM, pan*baidu*com@s@1uxsJidlezXK9Y1VKlSZYgA , password: r66t You have to download it by baidu disk app or PC client. URL format is forbidden here, you can replace *t  发表于 2019-4-29 08:09
daf0x 一级台风 发表于 2019-4-28 20:17:11 | 显示全部楼层
Hello? Is anyone listening? Has anyone been able to find or download this ROM?
Viktor 一级台风 发表于 2019-4-30 13:22:30 | 显示全部楼层
本帖最后由 Viktor 于 2019-4-30 13:40 编辑

I put on AFH (https:@@www*androidfilehost*com@?fid=1395089523397955963) You must to make backup NVRAM before flashing!!!! And restore it after.

daf0x 一级台风 发表于 2019-4-30 14:44:19 | 显示全部楼层
Thanks for the links! Unfortunately it seems the first one (baidu) has already expired, but the second one works!
Would you mind telling me where you found the (original?) links?  I still can't find anything on the Teclast site...

Could you please explain a bit more about the NVRAM? Why is it necessary to make a backup? Is this partition #20 (0xab00000--0xaffffff)? It seems to be the same size and location at least for "T2E1 Android 8.1.0 V1.00 20190312" and "T2E1 Android7.1.1 V1.16". Also the "T2E2 Android7.1.1 V1.02 20181130" ROM has the same NVRAM partition.

点评

NVRAM is a special part of MTK chip, it is not Flash and is not mapped to FS. Some OS store important configurations in NVRAM, such as IMEI, factory parameters.  发表于 2019-4-30 17:49
Viktor 一级台风 发表于 2019-4-30 16:12:44 | 显示全部楼层
I downloaded a long time ago, when the links were still alive, I took it from here: http:@@dq*tieba*com@p@6110046077  The address of the NVRAM section doesn't depend on the firmware version, it depends on the Android version: in Oreo it's different. Therefore, when installing Oreo, this section away. And this happens when you return to the 7th Android. Instructions on how to backup and restore it, you will find, I believe, on the Internet (there are many ways, the simplest is by SPFlashTool).
Viktor 一级台风 发表于 2019-4-30 20:41:58 | 显示全部楼层
本帖最后由 Viktor 于 2019-4-30 20:44 编辑
CODEPLAY
NVRAM is a special part of MTK chip, it is not Flash and is not mapped to FS. Some OS store important configurations in NVRAM, such as IMEI, factory parameters.

By and large, this is true, the partition isn't tied to the file system, but has its own address specified in the scatter-file (for Teclast T20 - 0xab00000). When you switch using the flasher from Nougat to Oreo it aways, IMEIs are lost, mobile communication is lost, etc. It has been tested in practice.
CODEPLAY 一级台风 发表于 2019-5-3 11:51:16 | 显示全部楼层
Here I introduce a simply way to restore NVRAM backup image. Using Write Memory funtion of SP Flash Tool. Because Memory Write function is hidden by default since a certain version of SP Flash Tool, you can press Ctrl+Alt+V to switch the tool to Advanced mode, you can find tool title changed to Smart Phone Flash Tool (Advanced mode).

Now open [window] menu, you can find Write Memory item. Choose your backup image file and setup start address to 0xAB00000, click write and plug your powered-down T20 into USB, NVRAM will be restored.

Be careful, you must make sure current OS version is same with your backup NVRAM image.
heyan198452 一级台风 发表于 2019-5-9 23:21:51 | 显示全部楼层
谢谢分享
南屏 一级台风 发表于 2019-5-10 11:16:41 | 显示全部楼层
By and large, this is true, the partition isn't tied to the file system, but has its own address specified in the scatter-file (for Teclast T20 - 0xab00000). When you switch using the flasher from Nougat to Oreo it aways, IMEIs are lost, mobile communication is lost, etc. It has been tested in practice.
heyan198452 一级台风 发表于 2019-5-10 12:37:32 | 显示全部楼层
链接都失效了,请问能否给个可用的链接?
kkddgcd 一级台风 发表于 2019-6-1 23:14:09 | 显示全部楼层
什么时候能在线更新?
Viktor 一级台风 发表于 2019-6-20 14:09:14 | 显示全部楼层
本帖最后由 Viktor 于 2019-6-20 22:23 编辑

On dq.tieba.com I can't answer for some reason, so I will write here my impressions about the second beta version of Oreo 8.1 firmware.
I use the firmware for a day. In General, the firmware is working, but raw. Ported from some other device (phone or 8-inch tablet): logo when launched in portrait orientation, device name is k97, there's a Radio app. Wi-Fi and 4g work without any problems. In my subjective opinion, touchscreens have become more responsive. The camera doesn't work at all. The Contacts app crashes. Few settings compared to the version on 7.1.1 Android. Revision of my tablet - T2E2. Root-access - Magisk. No, it looks like I spoke too soon: mobile data is lost and not come back.
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