On 6/19/19 5:59 AM, Charles Lepple wrote:
“The 62-nut-usbups.rules file looks pretty standard. Do you know if the changes to 42-usb-hd-pm.rules are needed? It seems like none of the USB devices would have the right permissions if 62-nut-usbups.rules isn't sufficient (though this happened in Debian once).”
My means of testing wasn’t the most rigorous, but I did try to use variable isolation with these changes and some other changes. I could not make the drops stop without having all 3 of these changes present. I believe a web search lead me to this udev rule so I’ll dig up the link for context.
This is starting to make sense, though. The link would be helpful, but no
worries if you can't find it.
I think you mentioned the CentOS version - which kernel version does that run?
("uname -r" is probably sufficient)
CentOS 7x uses RedHat's idea of 3.10.0 .. which means it's a heavily
patched 3.10. And by heavily I mean that in the 4 years since RHEL 7 was
released, they added tons ( literally thousands ) of backports from
4.xx, including from 4.18
Latest available kernel in the CentOS 7.6 line is 3.10.0-957.21.2 but
today we will probably release 3.10.0-957.21.3 which includes the fix
for TCP SACK.
The public beta of RHEL 7.7 uses 3.10.0-1049 but 7.7 GA will certainly
use a newer release. I have already in use a beta of 3.10.0-1055
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