HI,
On 20-05-18 01:53, Andrew Lutomirski wrote:
On May 2, 2018, at 9:14 AM, Frantisek Zatloukal <fzatlouk@xxxxxxxxxx <mailto:fzatlouk@xxxxxxxxxx>> wrote:
Hans,
can't this be affected also by different disk vendors (drive vendor in Lenovo laptop can vary even in same model) and different firmware of disks? Also, drive FW is upgradeable in Lenovo laptops.
On Wed, May 2, 2018 at 5:39 PM, Hans de Goede <hdegoede@xxxxxxxxxx <mailto:hdegoede@xxxxxxxxxx>> wrote:
Hi,
On 05/01/2018 10:40 AM, Lorenzo Dalrio wrote:
Hi,
i run fedora 28 on a t450 since it was promoted to beta working with it
8-10 hours per day without any issue.
System Information
Manufacturer: LENOVO
Product Name: 20BUS003IX
Version: ThinkPad T450
# cat /sys/class/scsi_host/host*/link_power_management_policy
med_power_with_dipm
med_power_with_dipm
med_power_with_dipm
=== START OF INFORMATION SECTION ===
Model Family: SanDisk based SSDs
Device Model: SanDisk SD7UB3Q256G1001
Serial Number: 153446402316
LU WWN Device Id: 5 001b44 ec5b3450c
Firmware Version: X2240501
User Capacity: 256,060,514,304 bytes [256 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: Solid State Device
Form Factor: 2.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2 T13/2015-D revision 3
SATA Version is: SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Tue May 1 08:39:01 2018 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Ok, so it seems that not everyone is affected, thank you for the
info.
Can you do:
cat /sys/class/dmi/id/bios_version /sys/class/dmi/id/bios_date
And let me know the output. Also related to this have you
updated your BIOS recently / are you in the habbit
of tracking BIOS updates? I'm wondering if this is BIOS
version related.
I’m going to go out on a limb and suggest that the problem might be with power management, not with SATA per se. On a modern Intel system, an NVMe device that hasn’t internally gone to sleep will prevent the PCIe link from going into an ASPM sleep state, and that, in turn, will keep the whole system from going into a deep PCn state. I could easily believe that there’s a bug where nasty ACPI things like brightness hotkeys go terribly wrong in deep PC states. I would also believe that the lack of SATA LPM will also block deep PC states. And I’d believe that the laptop has an electrical
problem that only affects Linux for mysterious reasons.
Yes in the mean time there is only one unsolved case of the 50 series
having issues with LPM on a SSD which is known to work with LPM for
others. This is likely a power-management issue.
It turns out that the user who was having issues with brightness
changes replaced his LCD panel with a non Lenovo part to get an
IPS screen in his laptop, so that one I've scratched of the list
as being due to the non OEM panel.
Regards,
Hans
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