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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