Galaxy S GT-I9000: how to fix boot to recovery with Volume up+Power?
I have Samsung Galaxy S (GT-I9000) and I've installed Cyanogenmod 10 M2. I can reboot into recovery from Cyanogenmod (Hold Power button, select Reboot and Recovery). However, I cannot boot directly to recovery holding Volume up + Power or Volume up + Home + Power when the phone is powered down.
Do I need to do something to the phone hardware to get some button combination to boot to recovery mode? As far as I know, the button combination I've tried is the correct one for this device. I can boot to download mode with Volume down + Power.
The recovery is the one installed along the official galaxysmtd Cyanogenmod 10 M2 ("CWM-based Recovery v18.104.22.168").
I would want to fix the issue because now I'm afraid to flash ROM updates because getting into recovery in case of boot loop is much harder if I cannot get the normal key combo to work.
Try removing the battery, then holding the buttons while you reinsert it. I'd also try other combos such as both Volume buttons + Power.
I'm now suspecting that there's something wrong with my recovery image. When I insert battery with Volume up + Power, it looks like some kind of boot loop while entering recovery: the galaxy s default boot logo shows up, then screen goes black for a moment, then cyanogenmod logo shows up, the screen goes black for a moment and then galaxy s default boot logo shows up after a moment. And the loop goes on until I release Volume up. Then it boots to full Cyanogenmd 10 M2 after a black flash or two.
I don't understand how it can still enter recovery when rebooted from Cyanogenmod - perhaps the hardware is in different state in that case and the recovery kernel is able to deal with it.
Interesting. I'd recommend flashing a recovery with Odin. (By the way, Odin will also save you if you can't boot into your ROM. It only relies on the bootloader.)
OK. I found the correct combination. It seems that the recovery distributed with Cyanogenmod 10 M2 for
galaxysmtdis really picky about the hardware buttons.
Here's how you can boot to recovery:
- Start with Galaxy S powered off
- Press and hold Volume up + Home
- Press and hold Power button
- Wait for (factory default) Galaxy S GT-I9000 boot display to show up
- Release the Power button before the second boot display with text "Cyanogen(mod)" shows up. Keep holding the Volume up + Home buttons.
- Wait for Recovery to start. After you see the recovery menu, you can release the Volume up and Home buttons.
If you fail to release the power button before the second boot display, you cannot get it to go into the recovery mode. Instead it will enter the normal boot sequence which seems to fail if you keep holding the Power button. On the other hand, if you don't keep buttons pressed long enough, it will enter the normal boot sequence, again. I haven't figured out if holding the Home button is really required but at least it does not prevent entering the recovery mode.
It turns out that at least with my hardware, holding the Home button is required. If I don't press the Home button, the bootloader seems to halt. Holding Power for 5-10 seconds reboots the device, otherwise nothing happens.
It's also worth mentioning that Galaxy S (GT-I9000 international version) has hardwired behavior to do hardware reset if power button is hold for 5-20 seconds (the delay seems to be random). The OS (Android) cannot cancel this so it does not matter if you have screen lock or a phone call active. I've accidentally rebooted my phone while holding gloves (the power button is on the side of the phone and will be accidentally activated very easily if one grabs the phone while wearing gloves because it's too cold outside to do without). For the first time it happened, I thought the OS had crashed.