** Changed in: wireless-regdb (Ubuntu Vivid)
Importance: Undecided => Medium
** Changed in: wireless-regdb (Ubuntu Vivid)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1437913
Title:
8086:095b [Lenovo ThinkPad X250] Wifi unstable on vivid with Intel
7265
Status in The Linux Kernel:
Unknown
Status in linux package in Ubuntu:
Invalid
Status in wireless-regdb package in Ubuntu:
Confirmed
Status in linux source package in Vivid:
Invalid
Status in wireless-regdb source package in Vivid:
Confirmed
Bug description:
After upgrading from utopic to vivid beta, wifi on the Intel 7265 on my
Thinkpad X250 has become unstable (linux-image 3.19.0-10.10, linux-firmware
1.143):
03:00.0 Network controller [0280]: Intel Corporation Wireless 7265
[8086:095b] (rev 59)
Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5210]
I'm seeing two primary problems:
* On 5GHz 802.11ac, I'll get DEAUTH_LEAVING almost exactly every minute,
followed by an immediate reconnect.
* On both 2.4GHz and 5GHz, all network activity will cease after 10-20
minutes. A manual reconnect will temporarily fix network activity.
This is complicated by the fact that the newer firmware requires
kernel 3.19 and kernel 3.19 requires the iwlwifi-7265D*.ucode firmware
instead of the old iwlwifi-7265*.ucode firmware, so it's not possible
to mix/match older/newer kernel/firmware combinations, nor do a kernel
bisect.
FAOD, the latest utopic kernel/firmware combination (linux-image
3.16.0-33.44, linux-firmware 1.138.1) works fine, which I can use in
vivid if I manually install them.
I have tested ~kernel-ppa/mainline 3.19.3-031903.201503261036 and
4.0.0-040000rc5.201503230035, which exhibit the same problems.
WORKAROUND: iw reg set US
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-10-generic 3.19.0-10.10
ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
Uname: Linux 3.19.0-10-generic x86_64
ApportVersion: 2.16.2-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ryan 1862 F.... pulseaudio
/dev/snd/controlC1: ryan 1862 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Mar 29 11:42:13 2015
HibernationDevice: RESUME=UUID=c21a0227-27e2-4c4f-8bd9-30793932acbc
InstallationDate: Installed on 2015-03-07 (22 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: LENOVO 20CMCTO1WW
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-10-generic
root=/dev/mapper/ubuntu--vg-root ro acpi_osi=Linux acpi_backlight=vendor
psmouse.proto=imps quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.19.0-10-generic N/A
linux-backports-modules-3.19.0-10-generic N/A
linux-firmware 1.143
SourcePackage: linux
UpgradeStatus: Upgraded to vivid on 2015-03-29 (0 days ago)
dmi.bios.date: 01/23/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: N10ET28W (1.05 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20CMCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50512 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrN10ET28W(1.05):bd01/23/2015:svnLENOVO:pn20CMCTO1WW:pvrThinkPadX250:rvnLENOVO:rn20CMCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20CMCTO1WW
dmi.product.version: ThinkPad X250
dmi.sys.vendor: LENOVO
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