@Antonello caroli.
Buona serata. Scusami per la brevità della risposta. Ecco quanto richiesto; preciso che sono relative a una configurazione a cui è stato tolto il supporto per la seriale.


client / # cpuinfo2cpuflags-x86
CPU_FLAGS_X86="3dnow 3dnowext mmx mmxext sse sse2 sse3"

client / # gcc -march=native -E -v - </dev/null 2>&1 | grep cc1
/usr/libexec/gcc/x86_64-pc-linux-gnu/4.9.3/cc1 -E -quiet -v - -march=k8-sse3 -mmmx -m3dnow -msse -msse2 -msse3 -mno-ssse3 -mno-sse4a -mcx16 -msahf -mno-movbe -mno-aes -mno-sha -mno-pclmul -mno-popcnt -mno-abm -mno-lwp -mno-fma -mno-fma4 -mno-xop -mno-bmi -mno-bmi2 -mno-tbm -mno-avx -mno-avx2 -mno-sse4.2 -mno-sse4.1 -mno-lzcnt -mno-rtm -mno-hle -mno-rdrnd -mno-f16c -mno-fsgsbase -mno-rdseed -mprfchw -mno-adx -mfxsr -mno-xsave -mno-xsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1 --param l1-cache-size=64 --param l1-cache-line-size=64 --param l2-cache-size=512 -mtune=k8 -fstack-protector-strong



client / # lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS690 Host Bridge
00:01.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS690 PCI to PCI Bridge (Internal gfx)
00:06.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS690 PCI to PCI Bridge (PCI Express Port 2)
00:07.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS690 PCI to PCI Bridge (PCI Express Port 3)
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI0)
00:13.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI1)
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI2)
00:13.3 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI3)
00:13.4 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI4)
00:13.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB Controller (EHCI)
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 14)
00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD/ATI] SB600 IDE
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB600 PCI to LPC Bridge
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS690M [Radeon Xpress 1200/1250/1270]
08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 02)


client / # lsmod
Module Size Used by
radeon 1507328 1
snd_usb_audio 180224 1
snd_usbmidi_lib 28672 1 snd_usb_audio
snd_hwdep 16384 1 snd_usb_audio
snd_rawmidi 32768 1 snd_usbmidi_lib
snd_seq_device 16384 1 snd_rawmidi
snd_pcm 102400 2 snd_usb_audio
ttm 94208 1 radeon
kvm_amd 65536 0
kvm 565248 1 kvm_amd
drm_kms_helper 147456 1 radeon
snd_timer 32768 1 snd_pcm
drm 360448 4 ttm,drm_kms_helper,radeon
edac_mce_amd 28672 0
edac_core 57344 0
snd 81920 8 snd_usb_audio,snd_hwdep,snd_timer,snd_pcm,snd_rawmidi,snd_usbmidi_lib,snd_seq_device
serio_raw 16384 0
pcspkr 16384 0
ata_generic 16384 0
k8temp 16384 0
irqbypass 16384 1 kvm
syscopyarea 16384 1 drm_kms_helper
soundcore 16384 1 snd
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
pata_acpi 16384 0
fb_sys_fops 16384 1 drm_kms_helper
xts 16384 0
gf128mul 16384 1 xts
cbc 16384 0
sha256_generic 20480 0
iscsi_tcp 20480 0
libiscsi_tcp 24576 1 iscsi_tcp
libiscsi 53248 2 libiscsi_tcp,iscsi_tcp
scsi_transport_iscsi 98304 2 iscsi_tcp,libiscsi
vmxnet3 57344 0
virtio_net 28672 0
virtio_ring 24576 1 virtio_net
virtio 16384 1 virtio_net
tg3 159744 0
libphy 49152 1 tg3
sky2 61440 0
r8169 81920 0
pcnet32 45056 0
mii 16384 2 r8169,pcnet32
igb 192512 0
ptp 20480 2 igb,tg3
pps_core 20480 1 ptp
dca 16384 1 igb
i2c_algo_bit 16384 2 igb,radeon
i2c_core 65536 5 drm,igb,drm_kms_helper,i2c_algo_bit,radeon
e1000 139264 0
bnx2 81920 0
atl1c 49152 0
fuse 98304 1
xfs 937984 0
nfs 237568 0
lockd 73728 1 nfs
grace 16384 1 lockd
sunrpc 294912 2 nfs,lockd
fscache 61440 1 nfs
jfs 172032 0
reiserfs 233472 0
btrfs 983040 0
ext4 565248 1
jbd2 102400 1 ext4
ext2 73728 0
mbcache 16384 3 ext2,ext4
linear 16384 0
raid10 45056 0
raid1 36864 0
raid0 20480 0
dm_raid 28672 0
raid456 102400 1 dm_raid
async_raid6_recov 20480 1 raid456
async_memcpy 16384 2 raid456,async_raid6_recov
libcrc32c 16384 2 xfs,raid456
async_pq 16384 2 raid456,async_raid6_recov
async_xor 16384 3 async_pq,raid456,async_raid6_recov
xor 24576 2 btrfs,async_xor
async_tx 16384 5 async_pq,raid456,async_xor,async_memcpy,async_raid6_recov
raid6_pq 102400 4 async_pq,raid456,btrfs,async_raid6_recov
dm_snapshot 40960 0
dm_bufio 28672 1 dm_snapshot
dm_crypt 24576 0
dm_mirror 24576 0
dm_region_hash 20480 1 dm_mirror
dm_log 20480 2 dm_region_hash,dm_mirror
dm_mod 110592 6 dm_raid,dm_log,dm_mirror,dm_bufio,dm_crypt,dm_snapshot
firewire_core 65536 0
crc_itu_t 16384 1 firewire_core
sl811_hcd 24576 0
xhci_pci 16384 0
xhci_hcd 180224 1 xhci_pci
usb_storage 69632 1
aic94xx 86016 0
libsas 73728 1 aic94xx
lpfc 643072 0
qla2xxx 630784 0
megaraid_sas 126976 0
megaraid_mbox 36864 0
megaraid_mm 20480 1 megaraid_mbox
aacraid 106496 0
sx8 24576 0
hpsa 98304 0
cciss 118784 0
3w_9xxx 45056 0
3w_xxxx 36864 0
3w_sas 28672 0
mptsas 61440 0
scsi_transport_sas 45056 4 hpsa,libsas,mptsas,aic94xx
mptfc 24576 0
scsi_transport_fc 61440 3 lpfc,qla2xxx,mptfc
mptspi 24576 0
mptscsih 40960 3 mptfc,mptsas,mptspi
mptbase 102400 4 mptfc,mptsas,mptspi,mptscsih
imm 20480 0
parport 49152 1 imm
sym53c8xx 81920 0
initio 28672 0
arcmsr 49152 0
aic7xxx 122880 0
aic79xx 131072 0
scsi_transport_spi 32768 4 mptspi,sym53c8xx,aic79xx,aic7xxx
sr_mod 24576 0
cdrom 57344 1 sr_mod
sg 36864 0
sd_mod 49152 2
pdc_adma 16384 0
sata_inic162x 20480 0
sata_mv 32768 0
ata_piix 36864 0
ahci 36864 0
libahci 32768 1 ahci
sata_qstor 16384 0
sata_vsc 16384 0
sata_uli 16384 0
sata_sis 16384 0
sata_sx4 20480 0
sata_nv 28672 0
sata_via 20480 0
sata_svw 16384 0
sata_sil24 20480 0
sata_sil 16384 0
sata_promise 20480 0
pata_via 16384 0
pata_jmicron 16384 0
pata_marvell 16384 0
pata_sis 20480 1 sata_sis
pata_netcell 16384 0
pata_pdc202xx_old 16384 0
pata_atiixp 16384 0
pata_amd 20480 0
pata_ali 16384 0
pata_it8213 16384 0
pata_pcmcia 20480 0
pata_serverworks 16384 0
pata_oldpiix 16384 0
pata_artop 16384 0
pata_it821x 20480 0
pata_hpt3x2n 16384 0
pata_hpt3x3 16384 0
pata_hpt37x 20480 0
pata_hpt366 16384 0
pata_cmd64x 16384 0
pata_sil680 16384 0
pata_pdc2027x 16384 0

preciso ancora che il kernel è sato ottenuto partendo da una configurazione pubblicata nel tread.
Buona serata e grazie per l'interessamento.