cannot file a bug report...
Gene Heskett
gheskett at shentel.net
Mon Jul 18 20:34:21 UTC 2016
On Monday 18 July 2016 14:30:42 Peter Silva wrote:
> On Mon, Jul 18, 2016 at 11:48 AM, Colin Law <clanlaw at gmail.com> wrote:
> > On 18 July 2016 at 16:32, Peter Silva <peter at bsqt.homeip.net> wrote:
> >> Just discovered my ethernet card (which is disconnected) consumes
> >> 19 watts on my laptop. when I do sudo rmmod r8168 after about ten
> >> minutes the laptop is completely cool, normal consumption is
> >> something like 11W for the whole machine now (was 24W before.)
> >> Checked through the db and it does not appear to be an existing
> >> bug.
> >>
> >> ubuntu-bug r8168-dkms
> >>
> >> It starts gathering information, then opens a blank window in
> >> chrome. that's all. never get to the bug entry form.
> >
> > Do you get the "Send problem report to the developers" popup?
>
> yes.
>
> > Which ubuntu version are you using?
>
> 16.04
>
> > Are you sure it is not a broken card?
>
> It works fine when ethernet is connected... how would I diagnose that?
>
> > When it is running hot do 'top' or system monitory show that there
> > is high processor usage?
>
> nope nada. system monitor when sorted by cpu usage shows the top user
> using 1% of a cpu. top shows chrome using more than that, but the
> load average is still extremely low.
>
> powertop sample:
>
> Summary: 1452.9 wakeups/second, 170.8 GPU ops/seconds, 0.0 VFS
> ops/sec and 24.9% CPU use
>
> Power est. Usage Events/s Category
> Description 14.8 W 0.0 pkts/s Device
> Network interface: eth0 (r8168)
> 2.28 W 75.5 ms/s 338.6 Process compiz
> 2.13 W 74.4 ms/s 216.8 Process
> /opt/google/chrome/chrome 614 mW 2.1 ms/s 157.9 Timer
> tick_sched_timer 554 mW 11.4 ms/s 94.3 Process
> /usr/lib/xorg/Xorg -core :0 -seat s
> 503 mW 3.8 ms/s 121.5 Process
> /usr/lib/x86_64-linux-gnu/notify-os
> 392 mW 7.2 ms/s 70.7 Interrupt [34] i915
> 340 mW 2.5 ms/s 80.7 Interrupt [4]
> block(softirq) 325 mW 514.3 µs/s 86.9 kWork
> intel_unpin_work_fn
>
> top (a few seconds later:)
>
> Tasks: 283 total, 1 running, 282 sleeping, 0 stopped, 0 zombie
> %Cpu(s): 0.3 us, 0.1 sy, 0.0 ni, 98.9 id, 0.6 wa, 0.0 hi, 0.0
> si, 0.0 st KiB Mem : 11733404 total, 8200876 free, 1839840 used,
> 1692688 buff/cache KiB Swap: 24761340 total, 24761340 free, 0
> used. 9018464 avail Mem
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
> COMMAND 3311 root 20 0 861052 112568 100632 S 2.0 1.0
> 0:04.48 Xorg 4982 peter 20 0 1385520 263568 67708 S 1.3 2.2
> 0:10.33 chrome 4404 peter 20 0 664300 38640 29068 S 1.0
> 0.3 0:01.14 gnome-term+ 2649 root 20 0 0 0 0
> S 0.3 0.0 0:00.03 jbd2/sda9-8 4561 peter 20 0 46020
> 3808 3084 R 0.3 0.0 0:00.24 top 1 root 20 0 119800
> 5928 3944 S 0.0 0.1 0:01.00 systemd 2 root 20 0 0
> 0 0 S 0.0 0.0 0:00.00 kthreadd
>
>
> then I do
>
> sudo rmmod 8168
>
> and powertop shows baseline power estimated drops from 23W to 4.7W,
> over about a minute. It fluctuates lower, to under 3W.
>
> So it is pretty dramatic and obvious.
>
I'd sure say so Peter, and since its tied to unplugging, or not ever
having a valid ethernet connection plugged in, I believe I'd file a bug
against that driver as its obviously not tolerant of a no connection
condition. And I'd mark the bug as a show stopper bug. In this case I
doubt my advice about wireshark or tcpdump will tell you much. If the
pckt count stays at 0, then there is no traffic to capture and analyse.
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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