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[console speed] lock console speed to start up speed (#2222)

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Auto negotiating console speed could cause sonic to lock on a wrong
speed under rare conditions. The only way to come out of the wrong
speed is to issue line break or restart console service with forced
speed, or reboot sonic.

Lock down the console speed to avoid these situations.

Signed-off-by: Ying Xie <ying.xie@microsoft.com>
This commit is contained in:
Ying Xie 2018-11-01 15:11:27 -07:00 committed by lguohan
parent ce54ef7256
commit f089d14970
1 changed files with 15 additions and 0 deletions
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15
files/image_config/platform/rc.local
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@ -85,6 +85,19 @@ update_mgmt_interface_macaddr() {
sed -i "/eth0/ s/ATTR{address}==\"$old_mac\"/ATTR{address}==\"$new_mac\"/g" /etc/udev/rules.d/70-persistent-net.rules sed -i "/eth0/ s/ATTR{address}==\"$old_mac\"/ATTR{address}==\"$new_mac\"/g" /etc/udev/rules.d/70-persistent-net.rules
} }
program_console_speed()
{
speed=$(cat /proc/cmdline | grep -Eo 'console=ttyS[0-9]+,[0-9]+' | cut -d "," -f2)
if [ -z "$speed" ]; then
CONSOLE_SPEED=9600
else
CONSOLE_SPEED=$speed
fi
sed -i "s|\-\-keep\-baud .* %I| $CONSOLE_SPEED %I|g" /lib/systemd/system/serial-getty@.service
systemctl daemon-reload
}
# If the machine.conf is absent, it indicates that the unit booted # If the machine.conf is absent, it indicates that the unit booted
# into SONiC from another NOS. Extract the machine.conf from ONIE. # into SONiC from another NOS. Extract the machine.conf from ONIE.
if [ ! -e /host/machine.conf ]; then if [ ! -e /host/machine.conf ]; then
@ -185,6 +198,8 @@ done
eval sonic_version=$(cat /etc/sonic/sonic_version.yml | grep build_version | cut -f2 -d" ") eval sonic_version=$(cat /etc/sonic/sonic_version.yml | grep build_version | cut -f2 -d" ")
program_console_speed
if [ -f /host/image-$sonic_version/platform/firsttime ]; then if [ -f /host/image-$sonic_version/platform/firsttime ]; then
if [ -n "$aboot_platform" ]; then if [ -n "$aboot_platform" ]; then