dscheck(vn0): b_bcount 2 is not on a sector boundary

Martin Aleksandrov Ivanov martin.ivanov at greenpocket.de
Mon Jun 8 23:13:17 PDT 2020

Dear all,

I am running the latest DragonFly on an ASUS laptop:

marto at dragonfly% uname -a
DragonFly dragonfly 5.8-RELEASE DragonFly v5.8.1-RELEASE #1: Thu May  7 
08:26:21 CEST 2020 root@:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64

After installing the mete desktop, I get the following boot messages:

dscheck(vn3): b_bcount 2 is not on a sector boundary (ssize 512)
dscheck(vn2): b_bcount 2 is not on a sector boundary (ssize 512)
dscheck(vn1): b_bcount 2 is not on a sector boundary (ssize 512)
dscheck(vn0): b_bcount 2 is not on a sector boundary (ssize 512)
md1: Malloc disk

If I remove mate and then do package autoremove, these boot messages 
disappear. After installing mate again, the messages reappear. Do you 
have an idea what these messages mean? Should I ignore them? Everything 
seems to run OK on my system.

After spitting the above 5 lines, dmesg continues like this:

[drm] Initialized
[drm] pdev:  vendor=0x8086  device=0x591b rev=0x04
[drm]       svendor=0x1043 sdevice=0x1970 irq=17
WARN_ON(domain->wake_count == 0)<4>WARN_ON(domain->wake_count == 
0)<4>WARN_ON(domain->wake_count == 0)<6>[drm] Memory usable by graphics 
device = 4096M
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] Driver supports precise vblank timestamp query.
i915/kbl_dmc_ver1_01.bin: could not load firmware image, error 2
tunable drm.video.eDP-1 is not set
error: [drm:pid-1:csr_load_work_fn] *ERROR* Failed to load DMC firmware 
[https://01.org/linuxgraphics/intel-linux-graphics-firmwares], disabling 
runtime power management.
tunable drm.video.DP-1 is not set
tunable drm.video.HDMI-A-1 is not set
tunable drm.video.DP-2 is not set
drm1: taking over the fictitious range 0x40000000-0x50000000
kms console: xpixels 1920 ypixels 1080
[drm] RC6 on
[drm] Initialized i915 1.6.0 20160711 for (null) on minor 0
drm1 on vgapci1
md2: Malloc disk

I guess some service is installed and turned on with the mate desktop. 
This service should be responsible for the messages. My hard drive has 4 
partitions that I created with gpt letting it automatically determine 
partition boundaries.

I am looking forward to your feedback. Any suggestions will be appreciated.

Best regards,


More information about the Users mailing list