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#1 2019-01-14 22:30:25

cherkie
Member
Registered: 2018-08-09
Posts: 77

[SOLVED] Slowdowns after transplanting SSD from one laptop to another

Hi there,

I have transplanted a SSD with a relatively fresh (3 months old) BL install from one latitude e6540 (i5-4300m with integrated gpu) to another latitude e6540 (i7-4800qm with Radeon 8790m).

After replacing I have ran apt update and apt upgrade.

I have noticed that new laptop is slow compared to the old one. Both are from 2013, both 8gb DDR3L ram.

I'm typing this from they phone so can't give you any logs, unsure what you'd like to see to be honest.

Any ideas as to the reason for slow operation? It's most noticeable when browsing but then my ram usage with Firefox sits at around 1GB.  only.

Thanks.

PS. Friend asked me for some logs, please follow links.

Dmesg - https://pastebin.com/s8PZpL5z

Journalctl - xe https://pastebin.com/5WXdqsX2

Another journalctl with -xe 2>&1 - https://cdn.discordapp.com/attachments/ … 24/log.txt

Thanks!

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#2 2019-01-14 22:57:55

twoion
ほやほや
Registered: 2015-08-10
Posts: 2,324

Re: [SOLVED] Slowdowns after transplanting SSD from one laptop to another

Well these are not so different. https://ark.intel.com/de/compare/75128,76347. The logs are only useful when comparing them side by side I guess.

Run powertop a while on both systems (any distro, preferably the same), do your thing and check frequency stats and idle stats. Frequency / P/C state scaling may be different between the two models as the i7 can draw 10W more power. The command cpupower frequency-info probaly shows driver:intel_pstate or something. Other than the old ondemand/performance/etc CPU governors, intel_pstate is a bit more complex and tied to the hardware package in your computer. Read https://www.kernel.org/doc/html/v4.19/a … state.html.

In short, try changing the energy performance bias using x86_energy_perf_policy from normal to performance to see if that changes the behaviour (see dmesg, search for "x86_energy_perf_policy") . Your CPU may scale up 'too slowly'. TLP may have an interface for this.

Additionally, check the temperature of the i7 using the lm-sensors package; if the CPU is at high temperatures it may throttle.

Lastly, is the new laptop really slower or does it just "feel" like it is? Benchmarks may be clarify this.

Finally, you may disable all spectre/meltdown/l1tf etc mitigations by booting with the kernel parameters "pti=off spectre_v2=off l1tf=off nospec_store_bypass_disable no_stf_barrier" and check again -- I have a i5-4210U laptop and with these mitigations enabled, it feels sluggish too. YMMV.


Im grünen Wald, dort wo die Drossel singt…

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#3 2019-01-15 08:06:44

cherkie
Member
Registered: 2018-08-09
Posts: 77

Re: [SOLVED] Slowdowns after transplanting SSD from one laptop to another

thanks for the reply. I will give this a go when I get back home tonight... I haven't even looked at the logs, exported them and went to bed and then I thought about typing this up.

It is slower, browsing is a pain. Opening new tab, typing in address there's 20-40sec delay between anything happening. Programs load slower, noticeable delay to start terminal. I am thinking the easiest solution will be export all the customisation (conkys tints all that #!) and reinstall.

The power draw is higher on the newer laptop due to i7 and the GPU.

Thanks again!

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#4 2019-01-15 20:04:16

cherkie
Member
Registered: 2018-08-09
Posts: 77

Re: [SOLVED] Slowdowns after transplanting SSD from one laptop to another

twoion - Occam's razor. I had two same latitudes E6540 (one of which I am selling) and I mixed up the power supply... One is 90W for the i5 and no dedicated GPU and the other is 130W for the i7 with the dedicated GPU...

I can report normal operation and 0 lag once I swapped over to 130W PSU...

And to think that I came back home with Arch live USB already burned... Thanks for your post, definitely informative!

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#5 2019-01-16 03:43:28

linux_user
Member
Registered: 2016-11-04
Posts: 232

Re: [SOLVED] Slowdowns after transplanting SSD from one laptop to another

Great that it is resolved. You can mark this thread as solved (just edit the thread subject and append [SOLVED])

Last edited by linux_user (2019-01-16 03:43:44)

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#6 2019-01-16 08:48:01

cherkie
Member
Registered: 2018-08-09
Posts: 77

Re: [SOLVED] Slowdowns after transplanting SSD from one laptop to another

oh yeah, forgot, soozzzzzz!

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