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#1 2018-03-06 21:23:23

wuxb
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From: Detroit, MI
Registered: 2012-09-13
Posts: 18
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4.15 kernel tty issue on Dell servers

The servers are either Dell R630/T630 with Xeon E5-26xx v4 CPUs.

After upgrading to 4.15 kernel(s) the default tty console is not shown. On boot only a few messages (systemd, etc..) is printed but the login prompt is not shown and the server seemd to have freezed no matter what I do with "Alt" + "F?".

However the system did successfully boot and the sshd is on and can be accessed over network. After switching to linux-lts which is 4.14 the issue is resolved --- after the messages the login prompt is out and I can login as usual.

Did this happen to anyone and any solution to the disappeared console? Thanks.

Last edited by wuxb (2018-03-06 21:23:47)

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#2 2018-03-06 21:59:17

loqs
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Registered: 2014-03-06
Posts: 5,845

Re: 4.15 kernel tty issue on Dell servers

The issue affects all 4.15 kernels including 4.15.7?  Please post a dmesg from a boot under 4.15.7 and one from under 4.14.23.
Edit:
Also the output of lsmod from both 4.14 and 4.15 please.

Last edited by loqs (2018-03-06 22:00:22)

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#3 2018-03-07 11:56:27

pgoetz
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From: Austin, Texas
Registered: 2014-02-21
Posts: 247

Re: 4.15 kernel tty issue on Dell servers

I'm having exactly this problem with a Thinkmate/SuperMicro server, so it's not just Dell.

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#4 2018-03-07 12:07:02

loqs
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Registered: 2014-03-06
Posts: 5,845

Re: 4.15 kernel tty issue on Dell servers

@pgoetz Please post the output of dmesg and lsmod from a boot under 4.15.7 and one from under 4.14.23.

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#5 2018-03-07 12:08:44

pgoetz
Member
From: Austin, Texas
Registered: 2014-02-21
Posts: 247

Re: 4.15 kernel tty issue on Dell servers

This appears to be the related error from the dmesg output:

[    2.961194] clocksource: Switched to clocksource tsc
[    2.969525] checking generic (dd000000 12c000) vs hw (dd000000 1000000)
[    2.969528] fb: switching to mgag200drmfb from simple
[    2.969566] Console: switching to colour dummy device 80x25
[    2.970045] [drm:mgag200_driver_load [mgag200]] *ERROR* can't reserve VRAM
[    2.970057] mgag200 0000:09:03.0: Fatal error during GPU init: -6
[    3.007366] systemd-journald[403]: Received request to flush runtime journal

I'm not running the newest kernel:

[root@www ~]# uname -a
Linux www 4.15.2-2-ARCH #1 SMP PREEMPT Thu Feb 8 18:54:52 UTC 2018 x86_64 GNU/Linux

Unfortunately this machine is a rackmount server, so I hardly ever see the console and am not sure when the issue started.

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#6 2018-03-07 12:10:59

pgoetz
Member
From: Austin, Texas
Registered: 2014-02-21
Posts: 247

Re: 4.15 kernel tty issue on Dell servers

loqs wrote:

@pgoetz Please post the output of dmesg and lsmod from a boot under 4.15.7 and one from under 4.14.23.

This is a production server, so I can't just reboot to 4.14.  I can try recreating the problem on another machine, though.

Last edited by pgoetz (2018-03-07 12:14:32)

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#7 2018-03-07 12:25:46

pgoetz
Member
From: Austin, Texas
Registered: 2014-02-21
Posts: 247

Re: 4.15 kernel tty issue on Dell servers

Comparing the lsmod output from this server to another SuperMicro-based system with the same video chip, but running the 4.13.12 kernel, it looks like the video driver, mgag200, is being loaded in both cases. Maybe this is only a problem for systems with Matrox MGA video chips?

Server with no console and 4.15.2:

[root@www ~]# lsmod
Module                  Size  Used by
ipt_REJECT             16384  5
nf_reject_ipv4         16384  1 ipt_REJECT
xt_conntrack           16384  6
iptable_filter         16384  1
xt_nat                 16384  4
xt_tcpudp              16384  17
iptable_nat            16384  1
nf_conntrack_ipv4      16384  11
nf_defrag_ipv4         16384  1 nf_conntrack_ipv4
nf_nat_ipv4            16384  1 iptable_nat
nf_nat                 36864  2 xt_nat,nf_nat_ipv4
nf_conntrack          155648  5 xt_nat,nf_conntrack_ipv4,xt_conntrack,nf_nat_ipv4,nf_nat
libcrc32c              16384  2 nf_conntrack,nf_nat
crc32c_generic         16384  0
iptable_mangle         16384  0
intel_rapl             24576  0
sb_edac                24576  0
x86_pkg_temp_thermal    16384  0
intel_powerclamp       16384  0
coretemp               16384  0
kvm_intel             229376  0
kvm                   704512  1 kvm_intel
mgag200                53248  0
ttm                   118784  1 mgag200
drm_kms_helper        200704  1 mgag200
irqbypass              16384  1 kvm
crct10dif_pclmul       16384  0
crc32_pclmul           16384  0
ghash_clmulni_intel    16384  0
input_leds             16384  0
pcbc                   16384  0
joydev                 24576  0
mousedev               24576  0
led_class              16384  1 input_leds
drm                   466944  3 mgag200,ttm,drm_kms_helper
aesni_intel           188416  1
ipmi_ssif              32768  0
agpgart                49152  2 ttm,drm
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
nls_iso8859_1          16384  1
aes_x86_64             20480  1 aesni_intel
nls_cp437              20480  1
crypto_simd            16384  1 aesni_intel
vfat                   20480  1
fat                    77824  1 vfat
glue_helper            16384  1 aesni_intel
igb                   245760  0
ptp                    20480  1 igb
pps_core               20480  1 ptp
cryptd                 28672  3 crypto_simd,ghash_clmulni_intel,aesni_intel
sysimgblt              16384  1 drm_kms_helper
mxm_wmi                16384  0
ioatdma                61440  0
fb_sys_fops            16384  1 drm_kms_helper
i2c_algo_bit           16384  2 mgag200,igb
hid_generic            16384  0
intel_cstate           16384  0
sr_mod                 28672  0
iTCO_wdt               16384  0
iTCO_vendor_support    16384  1 iTCO_wdt
mei_me                 45056  0
intel_uncore          131072  0
shpchp                 40960  0
intel_rapl_perf        16384  0
dca                    16384  2 ioatdma,igb
mei                   106496  1 mei_me
i2c_i801               32768  0
pcspkr                 16384  0
lpc_ich                28672  0
cdrom                  69632  1 sr_mod
ipmi_si                65536  0
ipmi_devintf           20480  0
ipmi_msghandler        53248  3 ipmi_ssif,ipmi_devintf,ipmi_si
rtc_cmos               24576  1
wmi                    28672  1 mxm_wmi
evdev                  20480  5
usbhid                 57344  0
mac_hid                16384  0
hid                   131072  2 hid_generic,usbhid
sch_fq_codel           20480  17
ip_tables              28672  3 iptable_mangle,iptable_filter,iptable_nat
x_tables               45056  7 ipt_REJECT,xt_nat,iptable_mangle,ip_tables,iptable_filter,xt_tcpudp,xt_conntrack
ext4                  712704  2
crc16                  16384  1 ext4
mbcache                16384  1 ext4
jbd2                  122880  1 ext4
fscrypto               32768  1 ext4
sd_mod                 61440  6
ahci                   40960  0
libahci                40960  1 ahci
crc32c_intel           24576  1
libata                278528  2 ahci,libahci
megaraid_sas          163840  4
ehci_pci               16384  0
ehci_hcd               94208  1 ehci_pci
scsi_mod              258048  4 sd_mod,megaraid_sas,libata,sr_mod
usbcore               286720  3 usbhid,ehci_hcd,ehci_pci
usb_common             16384  1 usbcore

Server with console running 4.13.12

[root@adam ~]# lsmod
Module                  Size  Used by
nls_iso8859_1          16384  1
nls_cp437              20480  1
vfat                   20480  1
fat                    65536  1 vfat
iTCO_wdt               16384  0
ipmi_ssif              24576  0
iTCO_vendor_support    16384  1 iTCO_wdt
intel_rapl             20480  0
x86_pkg_temp_thermal    16384  0
intel_powerclamp       16384  0
coretemp               16384  0
kvm_intel             192512  0
kvm                   516096  1 kvm_intel
irqbypass              16384  1 kvm
crct10dif_pclmul       16384  0
crc32_pclmul           16384  0
ghash_clmulni_intel    16384  0
pcbc                   16384  0
aesni_intel           184320  0
aes_x86_64             20480  1 aesni_intel
crypto_simd            16384  1 aesni_intel
glue_helper            16384  1 aesni_intel
cryptd                 20480  3 crypto_simd,ghash_clmulni_intel,aesni_intel
intel_cstate           16384  0
intel_rapl_perf        16384  0
pcspkr                 16384  0
mgag200                40960  1
ttm                    81920  1 mgag200
drm_kms_helper        131072  1 mgag200
drm                   303104  4 mgag200,ttm,drm_kms_helper
agpgart                36864  2 ttm,drm
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
igb                   200704  0
sysimgblt              16384  1 drm_kms_helper
mei_me                 36864  0
ptp                    20480  1 igb
lpc_ich                24576  0
mei                    81920  1 mei_me
fb_sys_fops            16384  1 drm_kms_helper
pps_core               20480  1 ptp
i2c_algo_bit           16384  2 mgag200,igb
i2c_i801               24576  0
ioatdma                49152  0
dca                    16384  2 ioatdma,igb
shpchp                 32768  0
ipmi_si                49152  0
ipmi_devintf           20480  0
ipmi_msghandler        40960  3 ipmi_ssif,ipmi_devintf,ipmi_si
tpm_tis                16384  0
tpm_tis_core           20480  1 tpm_tis
wmi                    20480  0
tpm                    49152  2 tpm_tis,tpm_tis_core
joydev                 20480  0
mousedev               20480  0
button                 16384  0
evdev                  24576  5
input_leds             16384  0
led_class              16384  1 input_leds
mac_hid                16384  0
sch_fq_codel           20480  9
ip_tables              24576  0
x_tables               32768  1 ip_tables
ext4                  557056  1
crc16                  16384  1 ext4
mbcache                16384  1 ext4
jbd2                   90112  1 ext4
fscrypto               24576  1 ext4
hid_generic            16384  0
usbhid                 45056  0
hid                   114688  2 hid_generic,usbhid
raid1                  40960  2
md_mod                126976  3 raid1
ses                    20480  0
enclosure              16384  1 ses
sd_mod                 49152  8
scsi_transport_sas     36864  1 ses
crc32c_intel           24576  0
megaraid_sas          135168  0
ahci                   36864  6
libahci                28672  1 ahci
ehci_pci               16384  0
libata                208896  2 ahci,libahci
ehci_hcd               73728  1 ehci_pci
usbcore               208896  3 usbhid,ehci_hcd,ehci_pci
scsi_mod              155648  5 sd_mod,megaraid_sas,ses,scsi_transport_sas,libata
usb_common             16384  1 usbcore

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#8 2018-03-07 17:24:52

loqs
Member
Registered: 2014-03-06
Posts: 5,845

Re: 4.15 kernel tty issue on Dell servers

On a machine you can recreate the issue on can you try linux 4.15.1-2 from the ALA.
Edit:  Or any linux > 4.15.3-1 although linux > 4.15.5-1 would be preferred.

Last edited by loqs (2018-03-07 18:20:07)

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#9 2018-03-07 18:52:21

pgoetz
Member
From: Austin, Texas
Registered: 2014-02-21
Posts: 247

Re: 4.15 kernel tty issue on Dell servers

I have another server in the same rack with the same graphics chip that hasn't been updated yet.  The simplest thing to do is just run updates on that machine and see if it suddenly loses console, too.

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#10 2018-03-09 16:02:34

pgoetz
Member
From: Austin, Texas
Registered: 2014-02-21
Posts: 247

Re: 4.15 kernel tty issue on Dell servers

I resolved my issue by upgrading from the 4.15.2 to the 4.15.7 kernel.  First time I've ever had a kernel update result in a failure to load console.

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#11 2018-03-09 16:27:30

loqs
Member
Registered: 2014-03-06
Posts: 5,845

Re: 4.15 kernel tty issue on Dell servers

You just picked an unfortunate kernel to update to if you do not do regular updates.  Only 4.15.1-3 to 4.15-3-1 inclusive had CONFIG_X86_SYSFB=y
Edit:
spelling inclusive not includsive

Last edited by loqs (2018-03-09 16:28:48)

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#12 2018-03-09 19:06:32

pgoetz
Member
From: Austin, Texas
Registered: 2014-02-21
Posts: 247

Re: 4.15 kernel tty issue on Dell servers

loqs wrote:

Only 4.15.1-3 to 4.15-3-1 inclusive had CONFIG_X86_SYSFB=y

Thanks for that helpful explanatory note.  Do you know why this option was changed for just that kernel sequence?

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#13 2018-03-09 19:32:49

loqs
Member
Registered: 2014-03-06
Posts: 5,845

Re: 4.15 kernel tty issue on Dell servers

The commit log does not have a reason for the initial inclusion of the option https://git.archlinux.org/svntogit/pack … ages/linux the removal could be related to "Pick some config options from Ubuntu"
which incidentally caused the same issue but for systems with nvidia GPU's but not using the nvidia driver which in turn had to be reverted in "Disable non-generic, non-virtual FB drivers again".

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