Bug 405589

Summary:	FTDI USB-serial x86 32-bit broken kernel >= 3
Product:	Gentoo Linux	Reporter:	Dhalsim <massimo.mattia.info>
Component:	[OLD] Core system	Assignee:	Gentoo Kernel Bug Wranglers and Kernel Maintainers <kernel>
Status:	RESOLVED TEST-REQUEST
Severity:	normal
Priority:	High
Version:	unspecified
Hardware:	AMD64
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

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?