I have this issue also: Wifi drops randomly but I think it happens only when
I'm plugged off from the charging cable?
When I plug it back in the wifi works again.
I did debug the problem with ping and it seems that when I'm on battery
I do not receive some packets or I receive some with delay but as soon
as I plug the charging cable back I receive those missed packets with
huge delay.
When I plug off my charging cable my syslog shows:
Jun 18 22:34:07 xps kernel: [ 9584.125828] ahci 0000:00:1f.2: port does not
support device sleep
And when I plug it in again I get:
Jun 18 22:36:39 xps kernel: [ 9735.942015] ahci 0000:00:1f.2: port does not
support device sleep
Jun 18 22:36:39 xps anacron[9292]: Anacron 2.3 started on 2014-06-18
Jun 18 22:36:39 xps anacron[9292]: Normal exit (0 jobs run)
Jun 18 22:36:41 xps kernel: [ 9737.707044] ata3.00: exception Emask 0x10 SAct
0x3 SErr 0x50000 action 0xe frozen
Jun 18 22:36:41 xps kernel: [ 9737.707047] ata3.00: irq_stat 0x00400000, PHY
RDY changed
Jun 18 22:36:41 xps kernel: [ 9737.707049] ata3: SError: { PHYRdyChg CommWake }
Jun 18 22:36:41 xps kernel: [ 9737.707051] ata3.00: failed command: WRITE FPDMA
QUEUED
Jun 18 22:36:41 xps kernel: [ 9737.707054] ata3.00: cmd
61/08:00:98:09:dc/00:00:17:00:00/40 tag 0 ncq 4096 out
Jun 18 22:36:41 xps kernel: [ 9737.707054] res
40/00:0c:38:aa:1f/00:00:18:00:00/40 Emask 0x10 (ATA bus error)
Jun 18 22:36:41 xps kernel: [ 9737.707056] ata3.00: status: { DRDY }
Jun 18 22:36:41 xps kernel: [ 9737.707057] ata3.00: failed command: WRITE FPDMA
QUEUED
Jun 18 22:36:41 xps kernel: [ 9737.707059] ata3.00: cmd
61/08:08:38:aa:1f/00:00:18:00:00/40 tag 1 ncq 4096 out
Jun 18 22:36:41 xps kernel: [ 9737.707059] res
40/00:0c:38:aa:1f/00:00:18:00:00/40 Emask 0x10 (ATA bus error)
Jun 18 22:36:41 xps kernel: [ 9737.707060] ata3.00: status: { DRDY }
Jun 18 22:36:41 xps kernel: [ 9737.707063] ata3: hard resetting link
Jun 18 22:36:41 xps kernel: [ 9738.428043] ata3: SATA link up 6.0 Gbps (SStatus
133 SControl 300)
Jun 18 22:36:41 xps kernel: [ 9738.430887] ata3.00: configured for UDMA/133
Jun 18 22:36:41 xps kernel: [ 9738.444026] ahci 0000:00:1f.2: port does not
support device sleep
Jun 18 22:36:41 xps kernel: [ 9738.444039] ata3: EH complete
And this happens only at my home. When I'm at the office, wifi works just fine.
With my previous laptop with Ubuntu installed I hadn't any problems with wifi
and my home router
It is Netwjork 150Mbps -router with WPA2 enabled and it's pretty old one but no
one else in my home is experiencing these kind of problems and there are 4
other people using the same wlan.
I already have A04 BIOS and sudo dmidecode -s bios-version && sudo
dmidecode -s bios-release-date returns
A04
03/19/2014
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https://bugs.launchpad.net/bugs/1330698
Title:
[Dell XPS 9333] WiFi dropping on
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