LG WP40NB30 gets Stuck Reading Discs

[Tuvanen]

Having issues getting MakeMKV to read discs put in the LG WP40NB30, the system detects and reads discs correctly but MakeMKV just hangs whenever a disc is inserted (DVD or Blu-ray). I am aware that this drive isn't supported yet but I figured I'd ask in case someone had a work around I wasn't aware of

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Drive Information
OS device name: /dev/sr1
Manufacturer: HL-DT-ST
Product: BD-RE WP40NB30
Revision: CW01
Serial number: KO4E3EE3747
Firmware date: 2013-11-20 12:34:56
Bus encryption flags: 1F
Highest AACS version: 81

LibreDrive Information
Status: Possible, might be supported in future, but not likely soon
Drive platform: RS1013
Firmware version: CW01-00a112013

[Billycar11]

try a higher power usb port or
get powered usb hub

[Tuvanen]

try a higher power usb port or
get powered usb hub

it is currently plugged into a powered usb hub

[Billycar11]

try a higher power usb port or
get powered usb hub

it is currently plugged into a powered usb hub

always let the os see the disc first then open makemkv
never open makemkv and then put a disc in

[Tuvanen]

always let the os see the disc first then open makemkv
never open makemkv and then put a disc in

Never had any issues doing it before but i already tried that and MakeMKV just hangs while opening

[Billycar11]

always let the os see the disc first then open makemkv
never open makemkv and then put a disc in

Never had any issues doing it before but i already tried that and MakeMKV just hangs while opening

does the os see the disc?

[tomty89]

For the problem of 1.17.6/7+ not working with a non-LibreDrive (on Linux), the best workaround is probably the sdf_Stop setting. See e.g. viewtopic.php?f=3&t=41692

[Tuvanen]

does the os see the disc?

Per the original post the System can read the disc and drive just fine, VLC can even play Titles from a blu-ray (no menus but that's a java problem). it's only MakeMKV that has issues

For the problem of 1.17.6/7+ not working with a non-LibreDrive (on Linux), the best workaround is probably the sdf_Stop setting. See e.g. viewtopic.php?f=3&t=41692

unfortunately sdf_stop doesn't help, even running makemkvcon directly gets hung up when when listing discs whenever the drive has a disc in it

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╰─ makemkvcon -r --cache=1 info disc:9999
MSG:1005,0,1,"MakeMKV v1.18.3 linux(x64-release) started","%1 started","MakeMKV v1.18.3 linux(x64-release)"
MSG:1004,131072,1,"Debug logging enabled, log will be saved as file:///home/[username redacted]/MakeMKV_log.txt","Debug logging enabled, log will be saved as %1","file:///home/[username redacted]/MakeMKV_log.txt"
MSG:1003,32,3,"DEBUG: Code 0 at `BLLaJX7%0; ?J)zOB:`KC:29393631","DEBUG: Code %1 at %2:%3","0","`BLLaJX7%0; ?J)zOB:`KC","29393631"
^C
╭─   3m 5.419s  ~   SIGINT                                                               [username redacted]@[hostname redacted]  14:44:07, 13  
╰─ makemkvcon -r --cache=1 info disc:9999
MSG:1005,0,1,"MakeMKV v1.18.3 linux(x64-release) started","%1 started","MakeMKV v1.18.3 linux(x64-release)"
MSG:1004,131072,1,"Debug logging enabled, log will be saved as file:///home/[username redacted]/MakeMKV_log.txt","Debug logging enabled, log will be saved as %1","file:///home/[username redacted]/MakeMKV_log.txt"
MSG:1003,32,3,"DEBUG: Code 0 at `BLLaJX7%0; ?J)zOB:`KC:29393631","DEBUG: Code %1 at %2:%3","0","`BLLaJX7%0; ?J)zOB:`KC","29393631"
DRV:0,2,999,4,"BD-RE ASUS BW-16D1H-U A204 KLZO5G92654","PONYO","/dev/sr0"
DRV:1,1,999,0,"BD-RE HL-DT-ST BD-RE WP40NB30 CW01 KO4E3EE3747","","/dev/sr1"
DRV:2,256,999,0,"","",""
DRV:3,256,999,0,"","",""
DRV:4,256,999,0,"","",""
DRV:5,256,999,0,"","",""
DRV:6,256,999,0,"","",""
DRV:7,256,999,0,"","",""
DRV:8,256,999,0,"","",""
DRV:9,256,999,0,"","",""
DRV:10,256,999,0,"","",""
DRV:11,256,999,0,"","",""
DRV:12,256,999,0,"","",""
DRV:13,256,999,0,"","",""
DRV:14,256,999,0,"","",""
DRV:15,256,999,0,"","",""
MSG:1003,32,3,"DEBUG: Code 2 at y=RXJf1x/y+c/-`)hYExv:121265062","DEBUG: Code %1 at %2:%3","2","y=RXJf1x/y+c/-`)hYExv","121265062"
MSG:5010,0,0,"Failed to open disc","Failed to open disc"
TCOUNT:0
╭─   7.462s  ~                                                                           [username redacted]@[hostname redacted]  14:45:26, 13  
╰─ 

[tomty89]

Have you checked whether the log file contains any extra logging, particularly lines with "sdf"? More precisely, have you confirmed that the log file would have different content before and after sdf_Stop is set?

As per what you have pasted, you have two drives connected to the machine. Is the other one flashed with an MK firmware? Or does it have a stock firmware (which would make it also a non-LibreDrive)? And if it is LibreDrive, do you also have the same problem when trying to open a disc through that drive?

[Tuvanen]

Have you checked whether the log file contains any extra logging, particularly lines with "sdf"? More precisely, have you confirmed that the log file would have different content before and after sdf_Stop is set?

i can't see a difference between the two modes unless i'm over looking something, in either mode makemkvcon only hangs when the drive has a disc in it
copied the content of the logs here:

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[with sdf_Stop & no disc]
Debug log started at Sat Jun 13 20:57:01 2026 , written by MakeMKV v1.18.3 linux(x64-release)
001005:0000 MakeMKV v1.18.3 linux(x64-release) started
001004:0000 Debug logging enabled, log will be saved as file:///home/[hostname redacted]/MakeMKV_log.txt
Using 6144KB for read cache.
Network access is ENABLED, CURL version 8.18.0/OpenSSL/3.5.5/1.68.0 (x86_64-redhat-linux-gnu) , proxy server not set.
001003:0020 DEBUG: Code 0 at `BLLaJX7%0; ?J)zOB:`KC:29393631
SDF  v0a5: ASUS_BW-16D1H-U_A204_211901041044_KLZO5G92654
No  SDF v0a5: HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747
SDF id v0a5: HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747
001003:0020 DEBUG: Code 2 at y=RXJf1x/y+c/-`)hYExv:121265062
005010:0000 Failed to open disc
Application exited at Sat Jun 13 20:57:01 2026

[without sdf_Stop & no disc]
Debug log started at Sat Jun 13 20:59:29 2026 , written by MakeMKV v1.18.3 linux(x64-release)
001005:0000 MakeMKV v1.18.3 linux(x64-release) started
001004:0000 Debug logging enabled, log will be saved as file:///home/[hostname redacted]/MakeMKV_log.txt
Using 6144KB for read cache.
Network access is ENABLED, CURL version 8.18.0/OpenSSL/3.5.5/1.68.0 (x86_64-redhat-linux-gnu) , proxy server not set.
001003:0020 DEBUG: Code 0 at `BLLaJX7%0; ?J)zOB:`KC:29393631
SDF  v0a5: ASUS_BW-16D1H-U_A204_211901041044_KLZO5G92654
No  SDF v0a5: HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747
SDF id v0a5: HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747
001003:0020 DEBUG: Code 2 at y=RXJf1x/y+c/-`)hYExv:121265062
005010:0000 Failed to open disc
Application exited at Sat Jun 13 20:59:30 2026

[with sdf_Stop & with disc]
Debug log started at Sat Jun 13 21:02:53 2026 , written by MakeMKV v1.18.3 linux(x64-release)
001005:0000 MakeMKV v1.18.3 linux(x64-release) started
001004:0000 Debug logging enabled, log will be saved as file:///home/[hostname redacted]/MakeMKV_log.txt
Using 6144KB for read cache.
Network access is ENABLED, CURL version 8.18.0/OpenSSL/3.5.5/1.68.0 (x86_64-redhat-linux-gnu) , proxy server not set.
001003:0020 DEBUG: Code 0 at `BLLaJX7%0; ?J)zOB:`KC:29393631
SDF  v0a5: ASUS_BW-16D1H-U_A204_211901041044_KLZO5G92654
No  SDF v0a5: HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747
SDF auto v0a5: HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747
[Terminated after 1 minute hang]

[without sdf_Stop & with disc]
Debug log started at Sat Jun 13 21:05:38 2026 , written by MakeMKV v1.18.3 linux(x64-release)
001005:0000 MakeMKV v1.18.3 linux(x64-release) started
001004:0000 Debug logging enabled, log will be saved as file:///home/[hostname redacted]/MakeMKV_log.txt
Using 6144KB for read cache.
Network access is ENABLED, CURL version 8.18.0/OpenSSL/3.5.5/1.68.0 (x86_64-redhat-linux-gnu) , proxy server not set.
001003:0020 DEBUG: Code 0 at `BLLaJX7%0; ?J)zOB:`KC:29393631
SDF  v0a5: ASUS_BW-16D1H-U_A204_211901041044_KLZO5G92654
No  SDF v0a5: HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747
SDF auto v0a5: HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747
[Terminated after 1 minute hang]

As per what you have pasted, you have two drives connected to the machine. Is the other one flashed with an MK firmware? Or does it have a stock firmware (which would make it also a non-LibreDrive)? And if it is LibreDrive, do you also have the same problem when trying to open a disc through that drive?

/dev/sr0 wasn't originally a LibreDrive, flashing with the MK firmware made it start working and has been happily chewing away at UHD disks for the last couple of months without complaint. /dev/sr1 is the only one that's having issues

[tomty89]

Although I'm not entirely sure but I think if you have set sdf_Stop correctly, the SDF lines for the drive of concern will not show up in the log.

Is this exactly what you have in ~/.MakeMKV/settings.conf?

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sdf_Stop = "HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747"

[Tuvanen]

Although I'm not entirely sure but I think if you have set sdf_Stop correctly, the SDF lines for the drive of concern will not show up in the log.

Is this exactly what you have in ~/.MakeMKV/settings.conf?

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sdf_Stop = "HL-DT-ST_BD-RE_WP40NB30_CW01_20131120123456_KO4E3EE3747"

it appears i copied the wrong bit of text from the log into the sdf_Stop config, /dev/sr1 is working now. Thanks!