Bug 745568

Summary:

pressing screen blank acpi button (Fn-F2 on Lenovo G550) crashes the kernel

Product:

[Fedora] Fedora

Reporter:

Jacek Pawlyta <cunio>

Component:

kernel

Assignee:

Kernel Maintainer List <kernel-maint>

Status:

CLOSED DUPLICATE

QA Contact:

Fedora Extras Quality Assurance <extras-qa>

Severity:

high

Docs Contact:

Priority:

unspecified

Version:

CC:

dwmw2, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda

Target Milestone:

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Target Release:

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Hardware:

x86_64

OS:

Linux

Whiteboard:

Fixed In Version:

Doc Type:

Bug Fix

Doc Text:

Story Points:

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Clone Of:

Environment:

Last Closed:

2011-11-10 09:41:48 UTC

Type:

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Regression:

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Mount Type:

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Documentation:

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CRM:

Verified Versions:

Category:

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oVirt Team:

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RHEL 7.3 requirements from Atomic Host:

Cloudforms Team:

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Target Upstream Version:

Embargoed:

Attachments:

Description	Flags
photo of an lcd of crashed kernel	none

Description Jacek Pawlyta 2011-10-12 18:10:39 UTC

Description of problem:
When I press Fn-F2 key combination (for blanking laptop LCD screen) on Lenovo G550 kernel crashes

Version-Release number of selected component (if applicable):
kernel-3.1.0-0.rc9.git0.0.fc16.x86_64 on Fedora 15

How reproducible:
Always

Steps to Reproduce:
1. start Fedora
2. press Fn-F2 keystroke  
  
Actual results:
laptop lcd screen goes blank

Expected results:
laptop lcd goes blank and then kernel crashes

Additional info:

Comment 1 Jacek Pawlyta 2011-10-12 18:37:48 UTC

There was an error above, corrected description of results is given here:

Actual results:
laptop lcd goes blank and then kernel crashes

Expected results:
laptop lcd screen goes blank

Comment 2 Chuck Ebbert 2011-10-21 03:39:39 UTC

Without a backtrace there's not much anyone can do with this.

Comment 3 Jacek Pawlyta 2011-10-21 06:48:08 UTC

Created attachment 529426 [details]
photo of an lcd of crashed kernel

Comment 4 Jacek Pawlyta 2011-10-21 06:50:35 UTC

Sorry, I haven't found any traces of the crash in the message.log. 

The only think I can do now is to take a photo of the screen (attached).

Let me know If you want me to do some other test, generate (somehow) backtrace.

Comment 5 Jacek Pawlyta 2011-10-21 06:54:26 UTC

Sorry, I haven't found any traces of the crash in the message.log. 

The only think I can do now is to take a photo of the screen (attached).

Let me know If you want me to do some other test, generate (somehow) backtrace.

When I connected external LCD I found that kernel crashes not when screen is going black but when I press Fn-F2 for the second time to unblack it. And the photo is what I see on the screen then.

Comment 6 Jacek Pawlyta 2011-10-23 19:54:55 UTC

in kernel 3.1.0-0.rc10.git1.1.fc16.x86_64 problem still persists

Comment 7 Jacek Pawlyta 2011-10-24 17:47:56 UTC

kernel 3.1.0-1.fc16.x86_64 is equipped with the bug as well

Comment 8 Jacek Pawlyta 2011-10-28 08:04:47 UTC

the bug is still here: kernel 3.1.0-5.fc16.x86_64

Comment 9 Dave Jones 2011-10-31 16:32:38 UTC

I'm wondering if your G550 shouldn't be using this ideapad module.
(Or it's possible Lenovo changed how the hardware works without changing the ident that causes this module to load).

dwmw2, any ideas ?

Comment 10 Jacek Pawlyta 2011-11-01 11:07:46 UTC

I don't know which one module G550 should use, but ideapad module from kernel-2.6.40 does well. So, definitely something was broken later.

Unfortunately kernel-3.2.0-0.rc0.git3.0.fc17.x86_64 hits the same problem

Comment 11 Jacek Pawlyta 2011-11-10 09:41:48 UTC


*** This bug has been marked as a duplicate of bug 748210 ***