Hello all,
we are development and manufacturing company that use your FT232R serial
converter for couple of years with our software. We consume about a
hundreds pcs of FT232R per yer. We use FT232R as USB serial converter
with direct access (no virtual serial port) and as a "hardware key"
using FTDIChip-ID. We operate our software with FT232R converters on
Windows and Debian Linux operating system.
We have used Intel motherboards with Intel processors so far. We want to
use AMD motherboards with AMD processors too. *We made a couple of tests
on AMD motherboards with AMD processors and Debian Linux 9.6, but we
have come across a big problem.
**When we open internal EEPROM of FT232R for reading, there will arise
many error messages in system log files. And then Debian Linux crash
after some time!*
_1) Hardware configurations:_
- motherboards with AMD A320M chipset:
- MSI A320M PRO-VD PLUS,
https://www.msi.com/Motherboard/support/A320M-PRO-VD-PLUS
- ASUS PRIME A320M-K, https://www.asus.com/Motherboards/PRIME-A320M-K
- GIGABYTE A320M-S2H,
https://www.gigabyte.com/Motherboard/GA-A320M-S2H-rev-1x#kf
- latest bios installed, default bios configuration loaded,
- CPU AMD Athlon 200GE, AMD Ryzen 3 2200G
- 4GB RAM, SSD drive Kingston A400 120GB
_2a) Operating system A:_
- Debian Linux 9.6 64bit, https://www.debian.org/distrib/,
https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-9.6.0-amd64-netinst.iso
- installed from Netinst installer WITHOUT graphic dekstop, default
configuration
- tested kernels
- default kernel 4.9.0.8-amd64,
https://packages.debian.org/stretch/linux-image-4.9.0-8-amd64
- backports kernel 4.18.0-0.bpo.1-amd64,
https://packages.debian.org/stretch-backports/linux-image-4.18.0-0.bpo.1-amd64
_2b) Operating system B:_
- Ubuntu server 19.04 64bit, http://releases.ubuntu.com/19.04/,
http://releases.ubuntu.com/19.04/ubuntu-19.04-live-server-amd64.iso
- installed WITHOUT graphic dekstop, default configuration
- tested kernels
- default kernel 5.0.0-amd64,
https://packages.debian.org/stretch/linux-image-4.9.0-8-amd64
- experimental kernel 5.0.9-050009-generic amd64,
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0.9/
_3) Drivers_
- libftd2xx drivers version 1.4.8, https://www.ftdichip.com/Drivers/D2XX.htm
_4) Performed tests_
You can repeat this test:
- connect FT232R into USB2.0 port (not USB3 port!)
- use examples in directory: ...\libftd2xx-i386-1.4.8.tar\release\examples\
- add parameter "-m32" to "CFLAGS" variable into "Rules.make" file
- compiled "\examples\EEPROM\user\read\"
- run script "test.sh" - see attached file
- *Debian Linux or Ubuntu server crashes after some minutes* - see
attached kernel logs from our system
- see "kern.log" https://paste.ee/p/xxIZ2
_5) Very important note_
*This problem occurs when FT232R is connected into USB2.0 port only!*
When it is connected into USB3 port, all works fine, no error messages,
no crash.
_6) Other test that we made_
- we made other tests on Windows 10
- same configuration with ASUS PRIME A320M-K motherboard
- latest drivers + latest FTDI drivers
- FT232R connected to USB2.0 or USB3 - no problem
- we made the same tests on Intel architecture (that we use now)
- motherboard MSI B250M PRO-VH, CPU Intel Pentium G4560, 4GB RAM, SSD
drive Kingston A400 120GB
- same operating system Debian Linux 9.6 64bit as descripted above
- FT232R connected to USB2.0 or USB3 - no problem
--
starosta
