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#1301 2017-03-15 18:23:32

damige
Member
Registered: 2016-09-02
Posts: 36

Re: Dell XPS 13 9350 Late 2015

Asriel wrote:
damige wrote:

Also : I have done some testing in the bios and have reached (in my case) another extra watt less power usage.
I think i have narrowed it down to disabling the sdcard in the bios. Could someone confirm this behavior?  (Yes i am using TLP)

Thanks for tip - switched off my SD card and dropped idle from abiut 3.9 to 3.5

Thanks, whats strange though is i do get a power gain disabling it in the bios but not if i power it down from linux.
Looks like to me that there are some measurable gains to be had here. Just checked the diff again, i could not get below 4w before, now i saw 3.28w !


XPS 13 9350 | i7-6560U | 8GB | 256G NVME | Intel 8260 | FHD

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#1302 2017-03-15 19:35:16

Asriel
Member
Registered: 2016-11-28
Posts: 38

Re: Dell XPS 13 9350 Late 2015

My MB with 6500 died , dell replaced it with 6560 - and now I am in the club , consuming 4W where it used to be 2.2 sad..... Still can not gain less than 3.5  - I got 16MB and killer 1535 so those two can make the difference.  Anyway opening firefox, thunderbird , skype and so on wake the CPU up so not much idle.

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#1303 2017-03-16 02:09:30

frank604
Member
From: BC, Canada
Registered: 2011-04-20
Posts: 1,207

Re: Dell XPS 13 9350 Late 2015

Asriel wrote:

My MB with 6500 died , dell replaced it with 6560 - and now I am in the club , consuming 4W where it used to be 2.2 sad..... Still can not gain less than 3.5  - I got 16MB and killer 1535 so those two can make the difference.  Anyway opening firefox, thunderbird , skype and so on wake the CPU up so not much idle.

I'm confused. What is 6550 and 6560?

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#1304 2017-03-16 03:00:47

Asriel
Member
Registered: 2016-11-28
Posts: 38

Re: Dell XPS 13 9350 Late 2015

i7 skylake CPUs - one with HD520 graphics, another with Iris 540.

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#1305 2017-03-16 23:24:41

kang
Member
Registered: 2010-08-07
Posts: 83

Re: Dell XPS 13 9350 Late 2015

id be happy at 4W ;P can barely go below 7W with the QHD touchscreen + 6560 i7 hehe (also i use my sdcard reader ;-)

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#1306 2017-03-17 11:09:26

kubrick
Member
Registered: 2016-10-07
Posts: 24

Re: Dell XPS 13 9350 Late 2015

kang wrote:

id be happy at 4W ;P can barely go below 7W with the QHD touchscreen + 6560 i7 hehe (also i use my sdcard reader ;-)

Yes, same configuration, same wattage here. I do get down to 5W by disabling all the things USB (including the SD card reader) in the BIOS and running a light desktop environment and switching wireless off, which is useful when I want to get 9/10h out of it on a plane for example.

I tried the new PCIE APST powersaving options from the new rc kernel (4.11) but I didn't see much of a difference.

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#1307 2017-03-17 11:17:07

OdinEidolon
Member
From: Belluno - Italy
Registered: 2011-01-31
Posts: 489

Re: Dell XPS 13 9350 Late 2015

kubrick wrote:
kang wrote:

id be happy at 4W ;P can barely go below 7W with the QHD touchscreen + 6560 i7 hehe (also i use my sdcard reader ;-)

Yes, same configuration, same wattage here. I do get down to 5W by disabling all the things USB (including the SD card reader) in the BIOS and running a light desktop environment and switching wireless off, which is useful when I want to get 9/10h out of it on a plane for example.

I tried the new PCIE APST powersaving options from the new rc kernel (4.11) but I didn't see much of a difference.

I have less then that (or similar) on my 9550 quad core with 32GB, something is wrong. Yes, I have the FHD, but still.


Hardware: 2016 Dell XPS15 - matte FullHD - i5-6300HQ - 32GB DDR4 - Nvidia GTX960M - Samsung 840EVO 250GB SSD - 56Wh
Software: Plasma 5 - rEFInd - linux-ck - preload - prelink - verynice - psd - bumblebee

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#1308 2017-03-17 11:20:50

kubrick
Member
Registered: 2016-10-07
Posts: 24

Re: Dell XPS 13 9350 Late 2015

OdinEidolon wrote:

I have less then that (or similar) on my 9550 quad core with 32GB, something is wrong. Yes, I have the FHD, but still.

What's your CPU? QHD is know to draw a lot more power, even on windows, but I agree something is weird as the extra power draw is seen even with the screen off... I'd love to know what's wrong though.

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#1309 2017-03-17 11:28:25

OdinEidolon
Member
From: Belluno - Italy
Registered: 2011-01-31
Posts: 489

Re: Dell XPS 13 9350 Late 2015

kubrick wrote:
OdinEidolon wrote:

I have less then that (or similar) on my 9550 quad core with 32GB, something is wrong. Yes, I have the FHD, but still.

What's your CPU? QHD is know to draw a lot more power, even on windows, but I agree something is weird as the extra power draw is seen even with the screen off... I'd love to know what's wrong though.

i5-6300HQ. Yes, it's an i5, but it also is a quad core and should theoretically draw significantly more power. With the screen and WiFi off I can very easily get to sub-6W territories, and sub-4W without Plasma and other stuff open, usually. Last week I left it in its sleeve for 2 hours, accidentally turned on in Plasma, with Chromium open and WiFi on, and the fans were not even on when I removed it from the sleeve, which is quite impressive.

Also note that according to my power measurement on my machine almost one entire Watt is taken by the 32GB of RAM by themselves, even at idle.

Last edited by OdinEidolon (2017-03-17 11:30:32)


Hardware: 2016 Dell XPS15 - matte FullHD - i5-6300HQ - 32GB DDR4 - Nvidia GTX960M - Samsung 840EVO 250GB SSD - 56Wh
Software: Plasma 5 - rEFInd - linux-ck - preload - prelink - verynice - psd - bumblebee

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#1310 2017-03-17 12:30:58

Asriel
Member
Registered: 2016-11-28
Posts: 38

Re: Dell XPS 13 9350 Late 2015

i7-6560 uses way more power sad  When I had 6500 with all USB switched off and lowest screen brightness at idle (mate desktop, one terminal opened and nothing else)  it was 2.18W. Same settings on i7-6560 gives 3.8W. So almost double.  Anyway in real use when some apps are running it is more anyway.

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#1311 2017-03-21 02:16:34

kgizdov
Trusted User (TU)
From: Edinburgh, UK
Registered: 2015-12-08
Posts: 112

Re: Dell XPS 13 9350 Late 2015

So I updated to BIOS 1.4.14 and now my battery constantly shows it's at 100%. What the hell? Can anyone else confirm this?


Dell XPS 13 (9350): Core i7, 16GB, 512GB NVMe

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#1312 2017-03-21 07:36:18

Asriel
Member
Registered: 2016-11-28
Posts: 38

Re: Dell XPS 13 9350 Late 2015

My bios is also 1.4.14 - but battery percentage reported ok.

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#1313 2017-03-21 07:47:19

OdinEidolon
Member
From: Belluno - Italy
Registered: 2011-01-31
Posts: 489

Re: Dell XPS 13 9350 Late 2015

kgizdov wrote:

So I updated to BIOS 1.4.14 and now my battery constantly shows it's at 100%. What the hell? Can anyone else confirm this?

Unplug the battery for a few minutes, this will reset the bios and probably fix it.


Hardware: 2016 Dell XPS15 - matte FullHD - i5-6300HQ - 32GB DDR4 - Nvidia GTX960M - Samsung 840EVO 250GB SSD - 56Wh
Software: Plasma 5 - rEFInd - linux-ck - preload - prelink - verynice - psd - bumblebee

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#1314 2017-03-21 16:53:16

kgizdov
Trusted User (TU)
From: Edinburgh, UK
Registered: 2015-12-08
Posts: 112

Re: Dell XPS 13 9350 Late 2015

OdinEidolon wrote:
kgizdov wrote:

So I updated to BIOS 1.4.14 and now my battery constantly shows it's at 100%. What the hell? Can anyone else confirm this?

Unplug the battery for a few minutes, this will reset the bios and probably fix it.

You're joking right. I need to disassemble the laptop to unplug the battery.

I was able to fix it by restoring the BIOS defaults.

Last edited by kgizdov (2017-03-21 16:53:32)


Dell XPS 13 (9350): Core i7, 16GB, 512GB NVMe

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#1315 2017-03-21 18:04:27

Asriel
Member
Registered: 2016-11-28
Posts: 38

Re: Dell XPS 13 9350 Late 2015

unscrew 9 bolts and remove cover - not a joke smile. Its easy and does not void warraty - but you right it is better tio try simple things like reset bios defaults first.

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#1316 2017-03-23 14:33:46

kubrick
Member
Registered: 2016-10-07
Posts: 24

Re: Dell XPS 13 9350 Late 2015

Great news,
commit a79fa23c82a1b7ee3726ea348336fbe874130a7c of kernel 4.10.5 seems to fix openvpn not being able to set routes correctly on newer kernels
AND
This patch seems to fix the issue with HDMI on the DA200 !!!

I have compiled a 4.10.5 kernel version with the DA200 & nvme patches, you can get it from here if you want:
linux-nvme-4.10.5-1-x86_64.pkg.tar.xz 78975d9bfcddbb5b4604c4a18a9400e5780d47b47d7c42f1f652f5fbe88c76b5
linux-nvme-docs-4.10.5-1-x86_64.pkg.tar.xz 389eadf1467a640c3dd24a077b0eb70f52d990477f1562b98a00cfc79b9362a9
linux-nvme-headers-4.10.5-1-x86_64.pkg.tar.xz 97032dc9ca6e50c752f3174e132f92daeffb89c7ac94c71168385a4fa1df2aa1

Warning from intel regarding the DA200 patch
The patch is currently in review. It's a workaround, and it impacts all DP sinks, not just the problematic ones. Thus, we need to be careful about merging it, and extra careful about backporting it to stable kernels.
If we agree on the approach of the patch, I expect it would be included in v4.11. I expect the release will be in about a month or so.

Last edited by kubrick (2017-03-23 14:47:24)

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#1317 2017-03-25 10:29:06

Asriel
Member
Registered: 2016-11-28
Posts: 38

Re: Dell XPS 13 9350 Late 2015

New version of DA200 patch is out - tested with 4.10.5, it works fine.

https://patchwork.freedesktop.org/patch/146125/

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#1318 2017-04-03 06:32:04

tbm13
Member
Registered: 2017-04-03
Posts: 1

Re: Dell XPS 13 9350 Late 2015

Asriel wrote:

New version of DA200 patch is out - tested with 4.10.5, it works fine.

https://patchwork.freedesktop.org/patch/146125/

Here's the final version: https://cgit.freedesktop.org/drm/drm-ti … 701ef54c42

Does anyone know if Dell's USB C to HDMI adapter uses the same chip as the DA200?

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#1319 2017-04-04 12:24:44

Asriel
Member
Registered: 2016-11-28
Posts: 38

Re: Dell XPS 13 9350 Late 2015

Dell USB C to HDMI uses different chip, not the same as DA200. It worked perfectly without a patch from the beginning, and works after patching. It is the DA200  which is a big fat hairy bug, not the USB-C - HDMI.

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#1320 2017-04-19 20:15:58

kang
Member
Registered: 2010-08-07
Posts: 83

Re: Dell XPS 13 9350 Late 2015

-- Reboot --
Apr 19 13:08:31 xps13 kernel: IP: drm_dp_get_mst_branch_device+0xa2/0x110 [drm_kms_helper]
Apr 19 13:08:31 xps13 kernel: BUG: unable to handle kernel NULL pointer dereference at           (null)

my life lately when connecting to the WD15 dock on 4.10.10 and 4.11rc7 ;-)
not sure what changed yet, though obviously there's a bug somwhere in the drm or i915 code

(also i guess i might try to use HDMI then lol)

Last edited by kang (2017-04-19 20:52:28)

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#1321 2017-05-02 17:34:50

robsmith11
Member
Registered: 2016-09-10
Posts: 23

Re: Dell XPS 13 9350 Late 2015

Now that 4.11 is out, is there any reason to run a patched kernel?  Are there any relevant NVME or Intel graphics power saving patches that have not been merged upstream?

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#1322 2017-05-02 18:14:07

kubrick
Member
Registered: 2016-10-07
Posts: 24

Re: Dell XPS 13 9350 Late 2015

robsmith11 wrote:

Now that 4.11 is out, is there any reason to run a patched kernel?  Are there any relevant NVME or Intel graphics power saving patches that have not been merged upstream?

The only relevant patch that I know of that is of interest is the DP training patch if you want the DA200 to work. NVMe APST is now part of mainline (and was actually the cause for the one week delay...)

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#1323 2017-05-02 21:24:14

kang
Member
Registered: 2010-08-07
Posts: 83

Re: Dell XPS 13 9350 Late 2015

New bios update.. and hmm new error:

sed_opal:OPAL: Error on step function: 0 with error 8194: Unknown Error

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#1324 2017-05-03 08:19:23

kubrick
Member
Registered: 2016-10-07
Posts: 24

Re: Dell XPS 13 9350 Late 2015

kang wrote:

New bios update.. and hmm new error:

sed_opal:OPAL: Error on step function: 0 with error 8194: Unknown Error

Self Encrypting Devices (SED) is new in 4.11, are you sure it's the BIOS upgrade that triggered this message, not the kernel upgrade?

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#1325 2017-05-08 20:28:46

kang
Member
Registered: 2010-08-07
Posts: 83

Re: Dell XPS 13 9350 Late 2015

kubrick wrote:
kang wrote:

New bios update.. and hmm new error:

sed_opal:OPAL: Error on step function: 0 with error 8194: Unknown Error

Self Encrypting Devices (SED) is new in 4.11, are you sure it's the BIOS upgrade that triggered this message, not the kernel upgrade?

you're right smile

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