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From: Manfred Antar <null@pozo.com>
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Subject: em broken on current amd64
Date: Sat, 5 Sep 2015 08:50:48 -0700
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Recent changes to em have broken current on amd64.
Booting kernel will hang when trying to load em0, then will continue bootin=
g without the driver loading (No Network)
This is on a HP SFF 8000 with em0 embedded on the motherboard.

boot messages:

em0: <Intel(R) PRO/1000 Network Connection 7.5.2> port 0x3100-0x311f mem 0x=
f3100000-0xf311ffff,0xf3125000-0xf3125fff irq 19 at device 25.0 on pci0
em0: attempting to allocate 1 MSI vectors (1 supported)
em0: using IRQ 265 for MSI
em0: Using an MSI interrupt
em0: The EEPROM Checksum Is Not Valid
device_attach: em0 attach returned 5


Manfred