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Bug 405589 - FTDI USB-serial x86 32-bit broken kernel >= 3
Summary: FTDI USB-serial x86 32-bit broken kernel >= 3
Status: RESOLVED TEST-REQUEST
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: AMD64 Linux
: High normal
Assignee: Gentoo Kernel Bug Wranglers and Kernel Maintainers
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-02-24 14:05 UTC by Dhalsim
Modified: 2012-08-27 20:38 UTC (History)
0 users

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Package list:
Runtime testing required: ---


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Description Dhalsim 2012-02-24 14:05:21 UTC
FTDI serial USB converter under 32-bit kernel not working. 
Ftdi_sio version 1.6.
kernel version >= 3 (gentoo-sources and vanilla-sources tested).
Tested compiling module and into bzimage

Tested with FT232RL single port chip  and FT2232D dual port chip

64-bit tested and unaffected


Reproducible: Always

Steps to Reproduce:
1.Put FTDI adapter into usb
2.open serial port device
3.read bytes from device
Actual Results:  
If some bytes were received byte return always one byte of value 0.

Expected Results:  
Read all bytes received on serial port

Attaching leds circuit over rx/tx insted of bright light I notice very weak lightin when trasmitting/receiving. With same hardware and 64-bit kernel leds activity is normal and all works fine.
Comment 1 Agostino Sarubbo gentoo-dev 2012-02-24 14:30:25 UTC
don't CC on your own.
Comment 2 Dhalsim 2012-02-27 01:53:33 UTC
Tested gentoo-sources 2.6.32-r29 and unaffected both 32-bit 64-bit (I'm always using same hardware)
Comment 3 Mike Pagano gentoo-dev 2012-06-22 18:53:58 UTC
It's been awhile here. Is this still an issue with later kernels?