[bug #36740] FTDI USB Serial Device not recognized and "insmod ehci" freezes grub

[Horst Prote]

URL:
  <http://savannah.gnu.org/bugs/?36740>

                 Summary: FTDI USB Serial Device not recognized and "insmod
ehci" freezes grub
                 Project: GNU GRUB
            Submitted by: prote
            Submitted on: Mi 27 Jun 2012 18:36:47 CEST
                Category: None
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: Bazaar - trunk
         Reproducibility: Every Time
         Planned Release: None

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Details:

My aim is to have grub terminal over serial line but as the mainboard has no
serial connector I bought an USB-Serial dongle but it is not recognized by
"usb" on grub command line. Even after
 insmod uhci
or
 insmod ohci
the "usb" command still lists no device.

When I enter
 insmod ehci
grub freezes. So I repeated this with a prior "set debug=ehci" and got fast
scrolling debug messages which seem to repeat themselves in an endless loop.
Once I let this running for 3:30 minutes before pressing the reset button.
Unfortunately without a serial console I can't copy the messages to a file. I
tried to shoot some pictures/movies but the photo camera didn't catch
everything and the video camera has only 25 fps. Shall I attach them
nonetheless?
I'll attach my transcript of some lines.



When the system is booted the agetty on ttyUSB0 works fine though.

System is gentoo, amd64 with grub-9999 (which is revision 4532 from bzr) and
USE flags for grub_platforms_efi-64 and device-mapper.

# lsusb | grep USB-Serial
Bus 002 Device 004: ID 0403:6001 Future Technology Devices International, Ltd
FT232 USB-Serial (UART) IC

# cat /proc/tty/driver/usbserial
usbserinfo:1.0 driver:2.0
0: name:"FTDI USB Serial Device" vendor:0403 product:6001 num_ports:1 port:1
path:usb-0000:00:1d.0-1.5

The mainboard is an Asus P8P67 DELUXE.




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File Attachments:


-------------------------------------------------------
Date: Mi 27 Jun 2012 18:36:47 CEST  Name: transcript.txt  Size: 10kB   By:
prote
Video/Photo transcript of ehci debug messages
<http://savannah.gnu.org/bugs/download.php?file_id=26115>

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