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Recently I've installed Ubuntu LTS 16.04 on a new Lenovo B50-10 laptop. Apparently everything is working properly, however some error messages apppears regarding pci devices on dmesg.

dmesg |grep fail

[    1.268776] pci 0000:00:1c.0: BAR 14: failed to assign [mem size 0x00200000]
[    1.268789] pci 0000:00:1c.0: BAR 15: failed to assign [mem size 0x00200000 64bit pref]
[    1.268803] pci 0000:00:1c.1: BAR 15: failed to assign [mem size 0x00200000 64bit pref]
[    1.268830] pci 0000:00:1c.1: BAR 15: failed to assign [mem size 0x00200000 64bit pref]
[    1.268839] pci 0000:00:1c.0: BAR 14: failed to assign [mem size 0x00200000]
[    1.268852] pci 0000:00:1c.0: BAR 15: failed to assign [mem size 0x00200000 64bit pref]

And some other messages like this:

[    0.537659] pci 0000:00:1c.1: BAR 15: no space for [mem size 0x00200000 64bit pref]

I've searched this errors on google, and everything indicates it could be a bios bug. Beside, a related error message appears on dmesg output, as you can see above:

[    2.867219] pci 0000:00:1d.0: EHCI: BIOS handoff failed (BIOS bug?) 01010001

  • I've updated the bios with the new version available on Lenovo support site, v2.07 at this point, released on Oct-2016, but the problem remain.

  • If I pass the option 'acpi=off' to the kernel, no error messages appears, but wifi card doesn't work.

  • If a fix 'OS Optimized default' to Enabled on Bios, and hit 'Load default settings', the errors remain.

IMHO, everything is related with a bios bug. In the past, I've suffered a similar problem with a Lenovo b50-30, but in that case, a bios update fixed the problem.

Any help would be appreciate.

Thans in advance,

Best Regards.

You'reAGitForNotUsingGit
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ragb1
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  • If everything in Ubuntu works fine, I wouldn't worry about it. – You'reAGitForNotUsingGit Dec 17 '16 at 17:15
  • I've found a possible explanation to this error messages in this thread:

    https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1426216

    ------- Comment From

    – ragb1 Dec 21 '16 at 16:16

2 Answers2

2

run the firmware test suite, fwts klog test on a freshly booted system, it may explain some of those error messages:

apt-get install fwts
fwts klog -
Colin Ian King
  • 18,820
  • The firmware test suite is interesting in that it reads the kernel log file for errors and warnings and explains what they mean. Thanks for the tip :) – WinEunuuchs2Unix Dec 18 '16 at 18:40
-1

Thank you for the answer!. I paste the result, not very useful info:

Results generated by fwts: Version V16.03.00 (2016-03-14 09:10:20).

Some of this work - Copyright (c) 1999 - 2016, Intel Corp. All rights reserved.
Some of this work - Copyright (c) 2010 - 2016, Canonical.

This test run on 18/12/16 at 01:03:27 on host Linux lenovo 4.4.0-53-generic
#74-Ubuntu SMP Fri Dec 2 15:59:10 UTC 2016 x86_64.

Command: "fwts klog -".
Running tests: klog.

klog: Scan kernel log for errors and warnings.
--------------------------------------------------------------------------------
Test 1 of 1: Kernel log error check.
Kernel message: [ 0.030056] ENERGY_PERF_BIAS: Set to 'normal', was 'performance'

ADVICE: This is not exactly a failure but a warning from the kernel. The
MSR_IA32_ENERGY_PERF_BIAS was initialized and defaulted to a high performance
bias setting. The kernel has detected this and changed it down to a 'normal'
bias setting.

Kernel message: [ 0.164916] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored

ADVICE: This is not exactly a failure mode but a warning from the kernel. The
_OSI() method has implemented a match to the 'Linux' query in the DSDT and this
is redundant because the ACPI driver matches onto the Windows _OSI strings by
default.

FAILED [CRITICAL] KlogAcpiNoValidCrt: Test 1, CRITICAL Kernel message: [
1.473105] [Firmware Bug]: No valid trip found

ADVICE: No valid ACPI _CRT (Critical Trip Point) was found.

Found 1 unique errors in kernel log.

================================================================================
0 passed, 1 failed, 0 warning, 0 aborted, 0 skipped, 0 info only.
================================================================================


0 passed, 1 failed, 0 warning, 0 aborted, 0 skipped, 0 info only.

Test Failure Summary
================================================================================

Critical failures: 1
 klog: CRITICAL Kernel message: [    1.473105] [Firmware Bug]: No valid trip found

High failures: NONE

Medium failures: NONE

Low failures: NONE

Other failures: NONE

Test           |Pass |Fail |Abort|Warn |Skip |Info |
---------------+-----+-----+-----+-----+-----+-----+
klog           |     |    1|     |     |     |     |
---------------+-----+-----+-----+-----+-----+-----+
Total:         |    0|    1|    0|    0|    0|    0|
---------------+-----+-----+-----+-----+-----+-----+
waltinator
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ragb1
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  • fwts is useful because it points to this bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1553691 and the solution is to get the latest BIOS update from Lenovo. – WinEunuuchs2Unix Dec 18 '16 at 18:45