[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete = Expired
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https://bugs.launchpad.net/bugs/1397032
Dear Christopher,
what have I to add?
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Title:
[Lenovo ThinkPad T540p] Intel Wireless Dual Band 7260AC fails to
connect
To manage
Federico Sassi, all the missing information requested in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1397032/comments/8
.
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Title:
** Tags added: needs-wifi-info
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Title:
[Lenovo ThinkPad T540p] Intel Wireless Dual Band 7260AC fails to
connect
To manage notifications about
Dear Seth,
I tested both stock kernel and 3.18.1 (with firmare 25.228.9.0) that I've
installed.
Now the wireless card CAN connect to a network and stay connected for a few
hours (sometimes) with both kernels BUT the transmission speed is very low (few
hunderds of KB/sec) and not continuoisly
Frederico: New firmware was recently released for you wireless hardware
which addresses a number of issues. Please ensure your system is fully
up to date, then reboot and see if this fixes your connection issues.
Thanks!
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ok, I understand.
I'll use the wifi for a period of time with kernel 3.18.1 and 3.13.
Since there are going to be holidays (and I'll not be in the office) I'll get
back to you in the new year.
Thank you
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Have I to use the same firmware?
with kernel 3.18.1 I'm using firmware version 23.214.9.0
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Title:
[Lenovo ThinkPad T540p] Intel Wireless Dual
Federico Sassi, please use the firmware that came with Ubuntu by
default. However, if you notice a difference using the default firmware
(bad or good) please feel free to advise to this.
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Dear Christopher,
I didn't explain myself correctly. The still wifi works with kernel 3.18.1
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Title:
[Lenovo ThinkPad T540p] Intel Wireless Dual
Dear Christopher,
I didn't explain myself correctly. The wifi *still* works with kernel 3.18.1
(always disabling the 11n )
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Title:
[Lenovo
Federico Sassi, just to clarify, is disabling 11n and using 3.18.1
provided more reliability than the default Ubuntu kernel?
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Title:
[Lenovo
Dear Christopher,
your solution works but the connection is not 100% reliable.
The laptop can connect, even send/receive large files but I also experience
lags and general slowness.
Moreover sometime it doesn't even connect and I have to reboot the laptop or
the router.
(test done on 3.13)
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Federico Sassi, glad to hear there is improvement for you. Does this
further improve with the latest mainline kernel 3.18.1?
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Title:
[Lenovo
The wifi works with the 9 (disabling the 11n as before) and kernel
3.18.1-031801-generic
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Title:
[Lenovo ThinkPad T540p] Intel Wireless Dual
I'm testing it right now.
I have standard firmware thus the driver doesn't find the latest
iwlwifi-7260-10.ucode and fall back to the 9 version.
Shall I install the 10 version from
http://wireless.kernel.org/en/users/Drivers/iwlwifi or keep using the 9?
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Federico Sassi, the next step is to fully reverse commit bisect from
kernel 3.18-rc7 to 3.18.1 in order to identify the last bad commit,
followed immediately by the first good one. Once this commit has been
identified, then it may be reviewed as a candidate for backporting into
your release. Could
I performed a few preliminary test with both kernels and the wireless seems
working with only G networks.
I had to disable the N part on the routers.
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Federico Sassi, if your routers broadcast on both n and g, you could just
disable n on your laptop via setting the following in
/etc/modprobe.d/iwlwifi.conf :
options iwlwifi 11n_disable=1
Also, the latest mainline kernel to test with is
Dear Christopher,
I've just tested with the latest one and it is still not working.
I've tested it with all different firmware version possible: .8 .9 and .10
uname -a
Linux henesis15 3.18.0-031800rc7-generic #201411302035 SMP Mon Dec 1 01:36:38
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Thank you
Federico Sassi, could you please provide the missing information
following https://wiki.ubuntu.com/Kernel/LinuxWireless ?
** Changed in: linux (Ubuntu)
Status: Confirmed = Incomplete
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Shall I perform the tests with the lastest upstream kernel or with the
ubuntu 14.04 stock one?
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Title:
[Lenovo ThinkPad T540p] Intel Wireless
Christopher,
I cannot do that now because it is the office router and other people are using
it.
I'll provide that information as soon as possible even if it is a long list of
tests.
Regards
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Dear Christopher,
thank you for answering and pointing out the old bios version.
I've updated the BIOS to the latest version and tried again with both kernels
and firmware.
The result didn't change, thus the wireless is still not working correctly.
As you requested this is the output that
Federico Sassi, could you please test the latest upstream kernel
available from the very top line at the top of the page (the release
names are irrelevant for testing, and please do not test the daily
folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will
allow additional
Federico Sassi, as per
http://support.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-t-series-laptops/thinkpad-t540p
an update to your BIOS is available (2.16). If you update to this following
https://help.ubuntu.com/community/BIOSUpdate does it change anything? If it
doesn't, could
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