Am 24.08.2013 23:04, schrieb NeilBrown: > On Sat, 24 Aug 2013 14:22:55 Radek Polak <pson...@seznam.cz> wrote: >> And the reenumerating modem - i really dont understand why we havent >> tried newer firmware. For me missed calls is quite serious problem. > > I'm starting to think the the re-enumeration could be an omap-usb > problem. I turned off a couple of power-saving features and the rate > at which my modem reenumerates went way down. Sometimes the the modem
Hmm could this by any chance have something to do with the infamous Linux-USB problem, recently pointed out by Sarah Sharp? http://permalink.gmane.org/gmane.linux.usb.general/93288 > disappears and comes back. Sometimes it disappears and doesn't come > back. In those cases if I rmmod the relevant modules and > modprobe them again it sometimes comes back and sometimes doesn't. > When rmmod/modprobe doesn't work, a reboot does. > But the reboot doesn't remove power from the modem so just resets the > omap. So it seems that the problem must be in the omap-usb driver. At > the very least if we could get it to reset the connection to the same > level as a reboot resets it, then we should be able to improve > reliability. > > Oh, and by the way: Don't "rfkill block wwan" :-( It doesn't > actually cause the modem to stop transmitting, but it does cause it > to be behave very badly in intermittent ways. My phone had been very > unstable for quite a while and I eventually traced it to an "rfkill > block all" that I had in my startup scripts. Removing that helped a > lot. BR, Lukas
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