Public bug reported:
Binary package hint: kernel-image-2.6.27-4-generic-di
Short form: my cellmodem works, passes data respectably for a bit, then
disconnects. And reconnecting sometimes causes hard-lock of the whole
system. My investigations under Hardy pointed to the airprime.ko kernel
module and I suspect the same is going on here.
Long form:
I'm using Ubuntu Intrepid Alpha 6-32bit, all updates as of the evening
of Sept. 23rd (kernel 2.6.27-4 unmodified).
I have a cellular modem under Verizon, Kyocera model KPC680 (laptop
Expresscard slot). Under lsusb I get:
Bus 002 Device 005: ID 0c88:180a Kyocera Wireless Corp.
I think this card is also used by at least one other cellular provider
(Cingular?).
Network Manager 7 will let me connect through it as a CDMA Network
device, and I get very strong performance in speedtest.net or similar:
over 2000kb/s download, around 300 up which is similar to what my last
device (a Verizon USB720) pulled in Hardy via wvdial script or Intrepid
Alpha 5 and Network Manager 7.
The problem with the KPC680 under Intrepid is that first, it times out
it's connection after around 10 minuted (varies) and second, on manual
reconnect it sometimes hard-locks the system (to a point where NO
debugging is possible). The timeouts (connection just ends) happen
regardless of whether there's data being transferred or not...in other
words trying to "hold the connection open" with something like a torrent
in the background doesn't work.
The connection timeouts with this KPC680 are similar to what I saw
trying to get this critter running in Hardy (with a wvdial script). So
either the underlying airprime driver needs help for this card, or NM7
needs to be tuned to support it better, I'm not sure which. I suspect
it could be solved at either end (kernel or NM7?). I jumped back to
Intrepid today specifically to try this device; it's the only used-and-
cheap replacement I could find locally after losing that wonderful
USB720 plug-in USB critter.
Note: there's a chance the same issues will affect the KPC650 card
(PCMCIA) as it's also airprime-based.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
Binary package hint: kernel-image-2.6.27-4-generic-di
Short form: my cellmodem works, passes data respectably for a bit, then
disconnects. And reconnecting sometimes causes hard-lock of the whole
system. My investigations under Hardy pointed to the airprime.ko kernel
module and I suspect the same is going on here.
Long form:
I'm using Ubuntu Intrepid Alpha 6-32bit, all updates as of the evening
of Sept. 23rd (kernel 2.6.27-4 unmodified).
I have a cellular modem under Verizon, Kyocera model KPC680 (laptop
Expresscard slot). Under lsusb I get:
Bus 002 Device 005: ID 0c88:180a Kyocera Wireless Corp.
I think this card is also used by at least one other cellular provider
(Cingular?).
Network Manager 7 will let me connect through it as a CDMA Network
device, and I get very strong performance in speedtest.net or similar:
over 2000kb/s download, around 300 up which is similar to what my last
device (a Verizon USB720) pulled in Hardy via wvdial script or Intrepid
Alpha 5 and Network Manager 7.
- The problem with the KPC680 is that first, it times out it's connection
- after around 10 minuted (varies) and second, on manual reconnect it
- sometimes hard-locks the system (to a point where NO debugging is
- possible). The timeouts (connection just ends) happen regardless of
- whether there's data being transferred or not...in other words trying to
- "hold the connection open" with something like a torrent in the
- background doesn't work.
+ The problem with the KPC680 under Intrepid is that first, it times out
+ it's connection after around 10 minuted (varies) and second, on manual
+ reconnect it sometimes hard-locks the system (to a point where NO
+ debugging is possible). The timeouts (connection just ends) happen
+ regardless of whether there's data being transferred or not...in other
+ words trying to "hold the connection open" with something like a torrent
+ in the background doesn't work.
- The connection timeouts are similar to what I saw trying to get this
- critter running in Hardy (with a wvdial script). So either the
- underlying airprime driver needs help for this card, or NM7 needs to be
- tuned to support it better, I'm not sure which. I suspect it could be
- solved at either end? I jumped back to Intrepid specifically to try
- this device; it's the only used-and-cheap replacement I could find
- locally after losing that wonderful USB720 plug-in USB critter.
+ The connection timeouts with this KPC680 are similar to what I saw
+ trying to get this critter running in Hardy (with a wvdial script). So
+ either the underlying airprime driver needs help for this card, or NM7
+ needs to be tuned to support it better, I'm not sure which. I suspect
+ it could be solved at either end (kernel or NM7?). I jumped back to
+ Intrepid today specifically to try this device; it's the only used-and-
+ cheap replacement I could find locally after losing that wonderful
+ USB720 plug-in USB critter.
Note: there's a chance the same issues will affect the KPC650 card
(PCMCIA) as it's also airprime-based.
--
KPC680 cellmodem card crashes Intrepid/NM7 (could be airprime.ko kernel module
is the culprit)
https://bugs.launchpad.net/bugs/273842
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