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grosmano
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Joined: 02 Jul 2012
Posts: 34
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 Posted: Thu Nov 15, 2018 12:50 pm Post subject: |
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| NeddySeagoon wrote: | | We still don't know what changed or why it works. |
Sure. Actually i don't even see evidence that anything has changed since the opening of this thread, apart from the acquisition of the dongle.
| Quote: | Does the LED in the dongle flash green or blue?
If its green, its going to be slow. Blue indicates 3G. Green is the older, slower data rate (9600 baud?)
Mobile carriers mostly oversell their data bandwidth by a huge margin, so when its busy its slow. |
It flashes blue, but still the connection feels very slow, much slower than from the phone. I guess it takes some numbers rather than feelings and i see some websites offer speed tests. I will try from home to connect to such a site from the phone and then from the computer with the usb dongle for better comparison. |
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grosmano
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Joined: 02 Jul 2012
Posts: 34
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| Posted: Thu Nov 15, 2018 7:39 pm Post subject: |
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Here are some numbers according to dslreports.com:
- from the computer with the usb dongle: 55.8 kilobit/s down, 62.6 kilobit/s up;
- from the phone: 2.57 megabit/s down, 2.43 megabit/s up.
"feels slower" |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54232
Location: 56N 3W
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| Posted: Thu Nov 15, 2018 8:48 pm Post subject: |
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grosmano,
If it were a real serial port sets the bit rate on the interface.
Try commenting that line out in the wvdial.conf file but I suspect that its ignored anyway.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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grosmano
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Joined: 02 Jul 2012
Posts: 34
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| Posted: Thu Nov 15, 2018 9:38 pm Post subject: |
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Yes, looks like it is ignored: no significant effect on the speed that remains in the order of 10s of kbit/s (67 down, 61 up).
It just made me think of another thing to check: as i plug the dongle, there is in dmesg "new full speed USB device number 6 using uhci_hcd", which apparently would be usb 1.0. Could this be the bottleneck? On the other hand when i plug my external hdd, which is reasonably fast, it says it is using ehci-pci. |
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NeddySeagoon
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Joined: 05 Jul 2003
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Location: 56N 3W
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| Posted: Fri Nov 16, 2018 6:26 pm Post subject: |
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grosmano,
USB 1.0 is 12Mbit/sec. That should support 10Mbit/sec download, so its not that.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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grosmano
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Joined: 02 Jul 2012
Posts: 34
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| Posted: Mon Nov 19, 2018 7:40 pm Post subject: |
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Ok, thanks.
I guess at this point i'd better try to be in direct contact with some technical service from vodafone. Hopefully they don't just tell me to double check the dongle is plugged in an usb port and not the ethernet port. |
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NeddySeagoon
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Joined: 05 Jul 2003
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Location: 56N 3W
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| Posted: Mon Nov 19, 2018 9:28 pm Post subject: |
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grosmano,
They will say
Have you restarted Windows?
We don't support Linux.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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grosmano
n00b
Joined: 02 Jul 2012
Posts: 34
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| Posted: Tue Nov 20, 2018 8:15 pm Post subject: |
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A simple test i should have done much earlier  : with the sim card from my phone in the dongle it is 40x faster than with the secondary card. I will get the latter changed... |
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grosmano
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Joined: 02 Jul 2012
Posts: 34
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| Posted: Sun Aug 04, 2019 12:42 pm Post subject: |
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Hello,
Some feedback with this usb gsm modem after several months of irregular use on two computers: a 7 years old netbook and a recent desktop computer. In the beginning the behaviour seemed rather chaotic, until i realized that i need to wait for the dongle's light to blink slowly (~once per second) before starting wvdial, which might take several minutes after plugging the dongle. Initially the light is still and the time it takes to start blinking is poorly repeatable. Since i'm being more patient after plugging the dongle it works fine on the netbook. On the desktop wvdial sometimes exits with the following message, but not always:
| Code: |
# wvdial vodafone
--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Sending: AT+CGDCONT=1,"IP","ac.vodafone.es"
AT+CGDCONT=1,"IP","ac.vodafone.es"
OK
--> Modem initialized.
--> Sending: ATDT*99***1#
--> Waiting for carrier.
ATDT*99***1#
CONNECT
--> Carrier detected. Starting PPP immediately.
--> Starting pppd at Mon Jul 22 21:08:30 2019
--> Pid of pppd: 3599
wvdial: utils/wvtask.cc:304: static int WvTaskMan::yield(int): Assertion `*current_task->stack_magic == WVTASK_MAGIC' failed.
Abandon
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So far it seems to happen randomly and not have much to do with the connection status, since the modem flashes and the connection actually works despite the error. Quite ofen the connection is eventually lost and i need to kill the pppd process and restart wvdial.
Overall, for now this thing looks mostly useful to me as a fallback in absence of wifi when travelling. My initial purpose was to use it as a default connection at home but i'm afraid i have to revise my expectation. |
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