Bug 865466 - usb flash disk changed device name after resume form suspend
Summary: usb flash disk changed device name after resume form suspend
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 18
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2012-10-11 14:05 UTC by Dalibor Pospíšil
Modified: 2012-11-12 20:56 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2012-11-12 20:56:28 UTC
Type: Bug

Attachments (Terms of Use)
dmesg (70.72 KB, application/octet-stream)
2012-10-11 14:05 UTC, Dalibor Pospíšil
no flags Details
dmidecode (14.23 KB, application/octet-stream)
2012-10-11 14:07 UTC, Dalibor Pospíšil
no flags Details
dmesg_t420s (149.04 KB, text/plain)
2012-10-15 13:19 UTC, Jaroslav Škarvada
no flags Details
dmidecode (14.22 KB, text/plain)
2012-10-15 13:32 UTC, Jaroslav Škarvada
no flags Details

Description Dalibor Pospíšil 2012-10-11 14:05:27 UTC
Created attachment 625547 [details]

Description of problem:
usb flash disk chande device after resume from suspend if booted from live in yellow charging USB port (back side on Lenovo T520) 

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. pm-suspend
2. resume
Actual results:
/dec/sdb changes to /dev/sdc

Expected results:
no change

Additional info:

Comment 1 Dalibor Pospíšil 2012-10-11 14:07:22 UTC
Created attachment 625548 [details]

Comment 2 Jaroslav Škarvada 2012-10-15 13:18:22 UTC
I encountered similar problem on Lenovo T420s. I got the flash disk partition renamed from /dev/sdb1 to /dev/sdc1 after several suspend/hibernate/suspend to both/resume cycles that rendered my live system unusable (due to rename). Thus it seems not to be 100% reproducible on my system. I had the flash disk connected to yellow charging USB port, but I am not sure whether it is the real source of the problem (I will retry to reproduce this with regular USB port).

Comment 3 Jaroslav Škarvada 2012-10-15 13:19:58 UTC
Created attachment 627414 [details]

Comment 4 Jaroslav Škarvada 2012-10-15 13:32:35 UTC
Created attachment 627429 [details]

Comment 5 Josh Boyer 2012-11-12 20:56:28 UTC
This is USB doing device re-enumeration.  There really isn't anything that can be done here.  We'd suggest you use UUIDs or labels for devices instead of raw device nodes.

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