Phil Dibowitz wrote: > Jiri Kosina wrote: >> I believe we should at least try to send "eject" command to these devices >> once they are detected, as that is sufficient to switch the mode for most >> of them, and I don't think it has potential to break anything. And we >> could simply. > > An eject command doesn't work, and in fact there's userspace tools to switch > the mode. See the thread on linux-usb with the hardware manufacturer. More specifically see: serious problem about unusual_devs.h(kernel?version>=2.6.26) and ZTE MD626 And my commit msg: ------------------------------------------- The ZTE modem entry causes usb-storage to ignore the device, but for some versions of the device, usb-storage mode is required to get to modem ode. For both kinds the tool: http://www.draisberghof.de/usb_modeswitch/ should work. Note that the various versions of the device have the same ProductId, VendorId, and bcdDevice number, so we cannot have the entry for some and not others. ------------------------------------------- As it turns out, this situation sucks. The manufacturer has many versions of this device that all have the same PID/VID/BCD (i.e. we can't tell them apart). All except the first were designed to work with Linux and work with both usb_modeswitch and, I believe some tool the company provides. And in fact usb-storage *must* bind to these or they will *never* switch to modem mode. HOWEVER, the very first rev was not created with Linux in mind and these userspaces tools don't work with them. That leaves us with two choices: * Make usb-storage ignore the device... the first gen of the hardware works, but every gen after that does NOT work * Let usb-storage see the device, and everything except the first gen works. This is a sucky choice, but we went with the last one, it benefits the greatest number of users. -- Phil Dibowitz phil@xxxxxxxx Open Source software and tech docs Insanity Palace of Metallica http://www.phildev.net/ http://www.ipom.com/ "Never write it in C if you can do it in 'awk'; Never do it in 'awk' if 'sed' can handle it; Never use 'sed' when 'tr' can do the job; Never invoke 'tr' when 'cat' is sufficient; Avoid using 'cat' whenever possible" -- Taylor's Laws of Programming
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