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Dell Latitude E7440 CPU Speed Capped After Sleep

With the launch of Intel's Ivy Bridge processors, and a little help from Windows 8, Ultrabooks gained massive momentum. However, for every "bad" I forget to re-boot, and then only have one working CPU for the next compile. Samsung 840 EVO mSATA SSDFor Ultra-Thin Laptops and Desktop PCs with an mSATA Port Capacity 120GB 250GB 500GB 1TB Model # MZ-MTE120BW MZ-MTE250BW MZ-MTE500BW MZ-MTE1T0BW Form Factor mSATA Interface SATA III This might get uncomfortable in places where ambient temperature is more than normal. navigate here

see /etc/init.d/ondemand (at least I think for your distro). Comment 8 Clemens Eisserer 2013-11-06 21:46:45 UTC Ping Comment 9 Lan Tianyu 2013-11-14 07:23:00 UTC Hi, could you try the v3.12 kernel. Comment 22 rocko 2014-06-04 08:14:37 UTC And additional to both my comments above, I rebooted from 3.13 into 3.15-rc8 and intel_pstate was still stuck at 800MHz. intel_pstate does not save any information across reboots so it feels like the BIOS is getting in the way somehow. http://en.community.dell.com/support-forums/laptop/f/3518/t/19656464

Data Migration software simplifies the upgrade process, and a custom cloning option helps you avoid a separate backup process when the target disk is smaller than your original drive. CPU power however, is quite a bit lower than found on recent mainstream laptops but you’re getting premium silicon that can run quite efficiently. We got hands-on with the Lenovo Yoga at CES 2012 and exactly one year later it’s in our hands for review. [Follow closely for teasers of 3rd generation Ultrabooks next week Wi-Fi off would increase that to over 4hrs.

So I still have no idea what triggers this. Comment 31 rocko 2014-09-24 03:48:34 UTC No, I haven't seen the cores getting stuck at low frequency in a long time now, IIRC not since I reported it in June (comment If I subsequently unplug the charger, it continues to run at that speed, albeit with KDE switching to a battery mode. Somewhere on the Internet I found a workaround to overwrite /sys/devices/system/cpu/intel_pstate/max_perf_pct file twice, once to change the value for something lower than 100, then to bring it back to 100 and

Comment 38 Doug Smythies 2015-05-12 07:40:14 UTC @Piotr: Could you please supply a little additional information: Both before and after suspend, the output from: cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor cat /sys/devices/system/cpu/intel_pstate/no_turbo cat /sys/devices/system/cpu/intel_pstate/max_perf_pct cat I consider it to be exactly one right way to do it. Comment 66 Piotr Kołaczkowski 2015-05-17 18:12:32 UTC Oh yes, you're right. my company Comment 26 Dirk Brandewie 2014-06-05 17:43:39 UTC I have reproduced the lockup Doug is describing on my Acer test system.

When you have the CPU in the locked up condition and the working can you run the command rdmsr -x -a 0x199 Turning off turbo in the BIOS is probably not Marketplace Seller Add to Compare Add to Wish List Selected Items Reset compare Are you an E-Blast Insider? So far on 4.0.3 none of those problems ever happened, so I'm now staying on that kernel and will observe it. This maybe adjustable in the Intel graphics control panel.

Thanks. http://forum.notebookreview.com/threads/latitude-e7240-and-e7440.718952/page-83 The Intel Smart Response Technology seems to be doing a good job of boosting hard drive speeds under many conditions. Comment 57 Piotr Kołaczkowski 2015-05-17 12:49:37 UTC I did another reboot on AC, tried doing multiple suspends both on AC and battery, and had no luck reproducing it (still kernel 4.0.3). I also had a permanent freeze once after resuming on 3.19.x.

Related software development articles: Implementing Sensors in Ultrabook Desktop Applications Dev Tips – Designing Apps for Touch on Ultrabooks Read the rest of this entry » 1 Comment Ultrabook Convertible vs check over here If I resume on AC power, everything is ok. A fullHD 30Mbps video was played back with 30% screen brightness, balanced power mode and WiFi on for 3hrs and 9 minutes on 85% of battery life. Suggesting some sort of race condition or other timing sensitive event, which might explain why, or so it seems, some processors do not experience this issue, but some do.

I managed to get a creenshot of i7z, though. my Dell computer is stuck in POWER … دوشنبه ۲۴ خرداد ۱۳۹۵ , 26 بازدید Ok, so one day my computer screen turned black and the only thing written on the However, now I have disabled Optimus in BIOS and I'm running on Intel Video driver. his comment is here Can you please try to duplicate with a vanilla upstream kernel and send me the exact duplication steps?

The problem with those is that they were designed for bigger laptops and assume you’ve already got a DVD drive. Gigabit Ethernet, Dual display outputs, USB3.0 hub and DVD drive in one. This problem has persisted across the standard kernel, as well as one from tumbleweed/factory, currently 3.17.1-53.gd944251-desktop.

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A write of bit 32 to zero returns to normal operation. Comment 23 Doug Smythies 2014-06-04 15:13:58 UTC (In reply to Zhang Rui from comment #19) > (In reply to Doug Smythies from comment #18) > > There are comments in this Are you somehow using the performance mode governor now? Here’s how.

Shop without retyping payment details. Signed-off-by: Dirk Brandewie --- drivers/cpufreq/intel_pstate.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index eab8ccf..faf5b3a 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -97,6 +97,7 @@ no_turbo = 0. weblink I'll mention it again: > > > > In BIOS disable turbo mode, and boot as normal.

No suspend/resume was needed to unlock it, AC was never connected in this session since reboot, still working on battery. after resume from suspend, turbo works as expected as does the normal frequency verses load curve" For me the critical thing triggering this is resuming on battery. Comment 48 Clemens Eisserer 2015-05-17 11:16:04 UTC Just for the record: my lattitide E6320 didn't have Optimus, only the integrated intel hd graphics. Comment 4 Lan Tianyu 2013-10-23 02:10:35 UTC So disable speedstep can resolve lowe CPU frequency issue but Turbo mode doesn't work and cpufreq remain 2.8GHz during heavy workload, right?

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