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Bug 136875 - vanilla-sources - UART fails after resume from suspend
Summary: vanilla-sources - UART fails after resume from suspend
Status: RESOLVED UPSTREAM
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: Gentoo Kernel Bug Wranglers and Kernel Maintainers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-06-15 04:05 UTC by Daniel Squires
Modified: 2006-07-01 08:59 UTC (History)
0 users

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Runtime testing required: ---

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Description Daniel Squires 2006-06-15 04:05:11 UTC 
Problem
-------
Upon resume from suspend attempts to access the serial port fail with "Input/output error".

The following is left in dmesg

ttyS0: LSR safety check engaged!

this line would appear to be from /usr/src/linux/drivers/serial/8250.c:1550

I have tried passing the parameter buggy_uart=1 at boot but this has not solved the problem.
 

Machine
-------
HP Compaq nx9005


kernel
------
2.6.16-suspend2-r8

lspci
-----
0000:00:00.0 Host bridge: ATI Technologies Inc AGP Bridge [IGP 320M] (rev 13)
0000:00:01.0 PCI bridge: ATI Technologies Inc PCI Bridge [IGP 320M] (rev 01)
0000:00:02.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
0000:00:06.0 Multimedia audio controller: ALi Corporation M5451 PCI AC-Link Controller Audio Device (rev 02)
0000:00:07.0 ISA bridge: ALi Corporation M1533 PCI to ISA Bridge [Aladdin IV]
0000:00:08.0 Modem: ALi Corporation M5457 AC'97 Modem Controller
0000:00:0a.0 CardBus bridge: O2 Micro, Inc. OZ6933/711E1 CardBus/SmartCardBus Controller (rev 01)
0000:00:0a.1 CardBus bridge: O2 Micro, Inc. OZ6933/711E1 CardBus/SmartCardBus Controller (rev 01)
0000:00:0c.0 FireWire (IEEE 1394): Texas Instruments TSB43AB21 IEEE-1394a-2000 Controller (PHY/Link)
0000:00:10.0 IDE interface: ALi Corporation M5229 IDE (rev c4)
0000:00:11.0 Bridge: ALi Corporation M7101 Power Management Controller [PMU]
0000:00:12.0 Ethernet controller: National Semiconductor Corporation DP83815 (MacPhyter) Ethernet Controller
0000:01:05.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility U1
0000:02:00.0 Network controller: Texas Instruments ACX 111 54Mbps Wireless Interface
0000:06:00.0 USB Controller: NEC Corporation USB (rev 43)
0000:06:00.1 USB Controller: NEC Corporation USB (rev 43)
0000:06:00.2 USB Controller: NEC Corporation USB 2.0 (rev 04)
Comment 1 Henrik Brix Andersen 2006-06-15 04:31:56 UTC 
Please try reproducing this problem with the in-kernel software suspend using latest vanilla-sources (2.6.17-rc6).
Comment 2 Daniel Squires 2006-06-16 01:21:47 UTC 
I can confirm that this problem persists in 2.6.17-rc6 using the pmdisk method. I was unable to try using mem method as this machine fails to resume from this state.
Comment 3 Henrik Brix Andersen 2006-06-16 02:51:44 UTC 
Thank you for verifying.
Comment 4 Daniel Drake (RETIRED) gentoo-dev 2006-07-01 08:59:48 UTC 
Please file a bug for this at http://bugzilla.kernel.org including full dmesg after resume. Post the new URL here.