> On Mon, Dec 16, 2013 at 9:14 AM, < > [email protected]> wrote: > >> Hello flashrom developers, >> >> I'm having trouble disabling write-protection on my Samsung Arm >> Chromebook. So far I've removed the metallic sticker covering the >> "write-protect screw hole" according to the pictures on the Chromium >> wiki >> < >> http://www.chromium.org/chromium-os/developer-information-for-chrome-os-devices/samsung-arm-chromebook >> >. >> On the Snow board, this hole ships with no screw in it. > > > Are you sure about that? There should be a screw there... > >
I guess I should not have spoken for all Snow boards, but mine certainly did not have a screw in the write-protect screw hole--only the metallic sticker. I did notice this the first time I opened it up, but I wasn't sure what to make of it. >> As root in >> developer mode, the output of flashrom -v is "flashrom v0.9.4 : 4169bc8 >> ...". The first time I ran flashrom --wp-disable, I got a message saying >> the operation FAILED with error=1. At that point I took the board apart >> again and cleaned the write-protect screw hole with q-tips dipped in >> rubbing alcohol. When I reassembled the Chromebook and tried again with >> flashrom -V --wp-disable, the last few lines I receive are: >> >> w25_set_srp0: old status: 0xb8 >> w25_set_srp0: new status: 0xb8 >> w25q_disable_writeprotect(): error=1. >> No -i argument is specified, set ignore_fmap. >> FAILED >> restore_power_management(): Power management enabled >> >> As you can see, I can't seem to disable write protection on this chip. >> I'm >> running stock ChromeOS. Any idea what I might be doing wrong? Thanks in >> advance. > > > That's weird... Since you have the system taken apart already, can you try > disconnecting the battery while the machine is unplugged? I'd recommend > leaving it disconnected for a minute or so, the idea being to give the SPI > ROM enough time to fully discharge and reset. > Thanks for responding. I took your advice and disconnected the battery for several minutes. After reassembling the board and running flashrom --wp-disable again I am receiving the same message (FAILED). flashrom --wp-status says: WP: status: 0x00b8 WP: status.srp0: 1 WP: status.srp1: 0 WP: write protect is enabled. WP: write protect range: start=0x00000000, len=0x00200000 > If you have a voltmeter handy, you can also try measuring the voltage on > the /WP pin (pin 3). More details on pin configuration can be found in the > datasheet: > http://www.winbond-usa.com/hq/enu/ProductAndSales/ProductLines/FlashMemory/SerialFlash/W25Q32DW.htm > I don't have voltmeter; I'm sure I could locate one given enough time though. Do you have any other suggestions as to steps I might be overlooking here? Otherwise, what should I be looking for specifically in the Winbond data sheet? _______________________________________________ flashrom mailing list [email protected] http://www.flashrom.org/mailman/listinfo/flashrom
