URL:
<http://savannah.gnu.org/bugs/?47406>
Summary: GRUB2 detects constant addition of nonexistent USB
devices
Project: GNU GRUB
Submitted by: tpearson
Submitted on: Mon 14 Mar 2016 05:51:05 AM GMT
Category: Booting
Severity: Major
Priority: 5 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release:
Release: Git master
Reproducibility: None
Planned Release: None
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Details:
When booted from coreboot on the KFSN4-DRE, KGPE-D16, or KCMA-D8 systems,
GRUB2 operates extremely slowly, constantly detecting new USB devices even
when no USB devices are actually present. Verbose logging shows a continuous
stream of the following messages:
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x303
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x100
bus/usb/ohci.c:1308: detect_dev status=0x303
bus/usb/ohci.c:1308: detect_dev status=0x100
This constant activity makes GRUB2 effectively unusable; USB keystrokes take
seconds to process per keystroke and booting from USB is all but impossible.
The affected chipsets thus far are:
nVidia CK804
AMD SB700
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