Hazel Russman wrote:
Like several people on this list, I have been getting annoying messages at
boot time about nonexistent storage devices on empty usb ports. An earlier
post by Bruce Dubbs suggested a simple edit of
/lib/udev/rules.d/50-udev-default.rules to prevent this. On my LFS7.6 system
with systemd, this edit worked very well.
However on LFS7.7 with sysvinit, it does not work. Not only do the messages
remain, but the change somehow screws up xorg's evdev driver so that neither
the mouse nor the keyboard work any more. This means that not only can I not
use X but I can't even get back to a console to correct the problem!
At first I thought I might have made a typo during the edit, so I tried again
by copying the previously edited file from LFS7.6 (where it works perfectly
well) to LFS7.7. It turns out the effect is real, though it only shows up
after rebooting with the modified file; simply shutting down and restarting X
under the new rules doesn't cause problems.
A diff run shows that the only difference between the old and the new files
is the position of the line ACTION!="add", GOTO="default_permissions_end".
Can anyone explain this?
Does it work if you use the unmodified 50-udev-default.rules?
The rules that are skipped by the change are:
1. SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", \
IMPORT{builtin}="usb_id", \
IMPORT{builtin}="hwdb --subsystem=usb"
2. SUBSYSTEM=="input", ENV{ID_INPUT}=="", \
IMPORT{builtin}="input_id"
3. ENV{MODALIAS}!="", \
IMPORT{builtin}="hwdb --subsystem=$env{SUBSYSTEM}"
There are 4 IMPORT{builtin} commands there that the change skips, but only if
the action is not "add". These just set variables that I'm pretty sure are only
applicable to the current rule. Unless these rules have some sort of global side
effect, I don't see how the change could cause your problem.
-- Bruce
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