On 28-Feb-2019 17:46, David Mathog wrote:
On 27-Feb-2019 18:13, Michael Conrad wrote:
Well, just a guess, but I'd say your problem is with kernel device
drivers for input. Usually people have the basic text showing up on
their console and the complaints are about how to get ^C and other
tty-specific features to work while using /dev/console. Your problem
sounds more like the Linux virtual console subsystem isn't connecting
to your input devices. I'd suggest poking around in the input drivers
section of the config and make sure things are compiled as "=y" and
not as modules.
Well, in 3 different kernels there were:
CONFIG_INPUT=y
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_KEYBOARD=y
but only 2 of the 3 work, the third one ignores input. Oddly 3.10.108
was the one originally giving me problems, so rebuilt it using "menu
oldconfig" starting from the config-3.10.0-957.5.1.el7.x86_64 from
Centos 7 and then 3.10.108 worked. But the 3.10.108 kernel had
problems with xfs. So built kernel 3.14.78, starting from the last
good 3.10.108 config, and that kernel does not respond (but xfs
works!)
Correction, xfs did not work, that test was accidentally done with a
Centos 7 kernel. In case this bites somebody else, 3.14.* kernels have
a parameter
CONFIG_MODVERSIONS which is automatically set when upgrading a config
(here the 3.10.108 config) like so:
yes "" | make oldconfig
The problem is that on the subsequent build hundreds of warnings like
this appear
in the log file:
WARNING: "schedule_timeout" [drivers/usb/storage/usb-storage.ko] has no
CRC!
Looks innocuous right, just a warning? These really should not be
warnings but errors, because if one of these afflicted modules tries to
load it will fail. That happened with gcc 4.8.5 and 5.3.1, for x86_64.
Presumably it works for some other combination of compiler/build tools
for that platform. The solution for that was to change the config for
3.14.78 to:
# CONFIG_MODVERSIONS is not set
and do a clean build. With 3.14.78 built like that the keyboard works
when it should and so does xfs.
Thanks,
David Mathog
[email protected]
Manager, Sequence Analysis Facility, Biology Division, Caltech
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