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It's not 'purposefully broken', and your brother wasn't giving you the 'party line' – he was relaying a fact. To charge over USB, Apple had break the USB spec w

It's not 'purposefully broken', and your brother wasn't giving you the 'party line' – he was relaying a fact. To charge over USB, Apple had break the USB spec without compromising compatibility or destroying existing USB peripherals. To do that, the hardware was modified to vend more amps over the bus but only when handshaking has occurred between the attached device and the OS drivers. If you'd installed Apple's drivers in your XP instance, things would have worked fine. If you want to argue that Apple should have made their changes public so anyone could re-implement, well, that's a different discussion.

recoiledsnake 16y ago
>It's not 'purposefully broken', and your brother wasn't giving you the 'party line' – he was relaying a fact. The fact is that 'some motherboards cannot supply the voltage' or is it 'it needs its own driver to charge' ? >To charge over USB, Apple had break the USB spec without compromising compatibility or destroying existing USB peripherals >If you'd installed Apple's drivers in your XP instance, things would have worked fine. So they purposefully broke the spec (looks like compatibility WAS compromised, wasn't it) by having a USB connector but not allowing all USB ports to charge it. What about the USB ports at airports, in car adaptors, heck, even the otherwise useless one on my Comcast DVR? So they couldn't make the iPad detect insufficient voltage and show 'Insufficient voltage detected. You need to install iTunes to charge me!' Or maybe charge at a slower pace and show a message to that effect? It's not as if it's an edge case seen by few, probably ~50% of iPad users might be connecting it to Windows PCs.
- noonespecial 16y ago
  Check my comment above. It actually does charge at a slower pace as long as its off on standard USB ports. A message to that effect would be fantastic as it took me a long time to figure this out. Its almost like they wanted me to assume the only way to charge my device was with official chargers, computers, or drivers. Hmmm.
- jackvalentine 16y ago
  > So they purposefully broke the spec (looks like compatibility WAS compromised, wasn't it) by having a USB connector but not allowing all USB ports to charge it. I'm fairly sure there is no requirement that your device is able to charge from every USB port. It is still 'in spec' because the cable is used to sync data. It only breaks spec when it knows that the hardware can take it (via apple drivers).

recoiledsnake 16y ago

>It's not 'purposefully broken', and your brother wasn't giving you the 'party line' – he was relaying a fact. The fact is that 'some motherboards cannot supply the voltage' or is it 'it needs its own driver to charge' ? >To charge over USB, Apple had break the USB spec without compromising compatibility or destroying existing USB peripherals >If you'd installed Apple's drivers in your XP instance, things would have worked fine. So they purposefully broke the spec (looks like compatibility WAS compromised, wasn't it) by having a USB connector but not allowing all USB ports to charge it. What about the USB ports at airports, in car adaptors, heck, even the otherwise useless one on my Comcast DVR? So they couldn't make the iPad detect insufficient voltage and show 'Insufficient voltage detected. You need to install iTunes to charge me!' Or maybe charge at a slower pace and show a message to that effect? It's not as if it's an edge case seen by few, probably ~50% of iPad users might be connecting it to Windows PCs.

noonespecial 16y ago
Check my comment above. It actually does charge at a slower pace as long as its off on standard USB ports. A message to that effect would be fantastic as it took me a long time to figure this out. Its almost like they wanted me to assume the only way to charge my device was with official chargers, computers, or drivers. Hmmm.
jackvalentine 16y ago
> So they purposefully broke the spec (looks like compatibility WAS compromised, wasn't it) by having a USB connector but not allowing all USB ports to charge it. I'm fairly sure there is no requirement that your device is able to charge from every USB port. It is still 'in spec' because the cable is used to sync data. It only breaks spec when it knows that the hardware can take it (via apple drivers).