Update: Regaw finally made it for us all! More info here http://forum.xda-developers.com/showthread.php?t=694572
I noticed that someone has mixed up the TEST RUU and the RELEASE RUU. However they are different. The test RUU has su file built inside, other than the release RUU!
I flashed RUU_Hero_C_Sprint_2.27.651.5_R_signed_release.exe and i love it very much.
This update is very great, except that I lose my root access. And I tried every method to get root back again but failed.
1. Using asroot2 to root - Failed
I followed the Sticky GUIDE "How to Root the Sprint CDMA Hero", but failed when running
I know the linux kernel changed to 2.6.29 with the update. Maybe that is the reason why asroot2 does not work.
2. Using flashrec to flash a custom recovery image and then get root - Failed
I installed FlashRec 1.1.3 from zenthought's website, but failed when I tried backingup my recovery image.
3.Using adb to push the su file into the phone - Failed
I dump the su file from damageless's rom and flipz's Fresh 2.1.1 rom. Then using adb to push it into /data/local/ and chmod it to 4777, but running failed. It just said "Permission Denied". However, i push a busybox file into /data/local/ and chmod it to 4777, the busybox command runs ok.
KeithKris pointed that Su doesn't work on /data because that directory is mounted nosuid.
4.Using fastboot to flash a custom recovery image and then get root - Failed
I reboot my phone into fastboot, then connect it to PC using USB. I tried this command "fastboot boot recovery-RA-heroc-v1.6.2.img" but faild, it said "downloading 'boot.img'... FAILED (remote: not allow)".
5.Trying to flash back to RUU_Hero_C_Sprint_2.20.651.1_signed_test.exe - Failed
It said "Error 140: BOOTLOADER Version Error!".
Although regaw_leinad has pointed that the md5s on both(release version and test version) hboots are the EXACT same.
Update: 6. the Volex method - Failed
this volex method is revealed here. Already tested by regaw that 2.1 patched it. It doesn't work.
After all these failures, there seems to be at least two ways to get the root back. And regaw_leinad and other guys are working hard on them.
1. Try to make a new asroot2 to exploit the linux 2.6.29/android 2.1 on our cdma hero. Here is the source code of our asroot2 -- heroc 1.5 exploit tool.
2. Try to hack the RUU file (actually we mean the rom.zip in the RUU.exe) and make sure it will pass the Bootloader check and signature check(maybe md5?). Then we could flash a RUU with su built inside and get the root back.
If anyone knows something about how to pass the signature check(maybe md5?) or linux kernel exploit, please share your wisdom. Thank you.
This post will be updated every day until the way to root comes out.
Update: Thanks to the donators in this thread! I believe the devs will find the exploit method soon with your support!
BTW: Never ever flash the official 2.1 release RUU.exe unless you know what you are doing. You won't get root access until the exploit method has been found. If you do love the official update, you may flash this damageless's rom dump from the official 2.1 release. And the radio dump from the official 2.1 release is here1 and here2 (thanks to damageless and flipz, and remember flashing radio at your own risk). The only difference between damageless's dump and official RUU's system part is that it has root and busybox and it removed some useless apks.