Fatal error occurred: Linux edition

[zeroryouko]

I see over on the Mac forum someone is saying that with version 2.0.0, they're getting lots of "A fatal error occured. MakeMKV will now exit." messages.

I can confirm it's happening with v 2.0.0 on Linux as well. Both with actual Blu-Ray discs and with (successful) MakeMKV backup images. Rolling back to 1.18.4 fixes it right up. I'm not seeing any other messages logged...after a bit of thinking, it just doesn't open the disc or image, and dies.

[Sayaka]

...And I can confirm that the same thing happened to me with the Windows 2.0.0 version as well, except this time MakeMKV at least tried to open a few titles before crashing almost immediately.

[16442496]

All good here.

I tested with:

Debian stable
Debian testing
Linux Mint 22.3

Plus

Windows 7
Windows 10

DVD/BD/ISO all works. (No UHD stuff here)

https://postimg.cc/G4RKcRv1

[Sayaka]

I tested it with an Ubuntu LTS Noble Numbat-based distro, and then with an Arch distrobox inside that same distro, and then also with Windows 11. I am still getting the crashes. I am now really curious as to what is going on.

[Sayaka]

UPDATE : Also tested with the newest Flatpak version on Linux Mint 22.3 "Zena" with XFCE rather than KDE this time. I did a basic test, I merely tried to open an ISO file with my drive unplugged. Instant crash.

These crashes on Ubuntu Noble and Linux Mint Zena seem to occur regardless of whether you open a UHD ISO or a regular Blu-ray ISO. DVD ISOs, on the other hand, seem to work fine for me.

EDIT : Here is the crash dump for Ubuntu Noble, the crash also happens when using version 1.18.4 of the GUI and makemkvcon 2.0.0, but not the other way around, suggesting that the problem indeed stems from makemkvcon.

PID: 7904 (makemkvcon)
UID: 1000 (sayaka)
GID: 1001 (sayaka)
Signal: 11 (SEGV)
Timestamp: Sat 2026-09-26 20:02:19 CEST (6s ago)
Command Line: /usr/bin/makemkvcon guiserver A0001+shm
Executable: /usr/bin/makemkvcon
Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-makemkv@3dca7cfdd48a4a6aab29a92bf5e55c01.service
Unit: user@1000.service
User Unit: app-makemkv@3dca7cfdd48a4a6aab29a92bf5e55c01.service
Slice: user-1000.slice
Owner UID: 1000 (sayaka)
Boot ID: 5f05511e8b854d9887bdb8e1483f678d
Machine ID: da2da23db9b8b7696f6ac54d68514737
Hostname: [redacted]
Storage: /var/lib/systemd/coredump/core.makemkvcon.1000.5f05511e8b854d9887bdb8e1483f678d.7904.1790445739000000.zst (present)
Size on Disk: 13.3M
Message: Process 7904 (makemkvcon) of user 1000 dumped core.

Module libzstd.so.1 from deb libzstd-1.5.5+dfsg2-2build1.1.amd64
Module libgomp.so.1 from deb gcc-14-14.2.0-4ubuntu2~24.04.1.amd64
Module libgcc_s.so.1 from deb gcc-14-14.2.0-4ubuntu2~24.04.1.amd64
Module libstdc++.so.6 from deb gcc-14-14.2.0-4ubuntu2~24.04.1.amd64
Stack trace of thread 7905:
#0 0x000057752118a422 n/a (makemkvcon + 0x5a7422)
#1 0x000057752124188c n/a (makemkvcon + 0x65e88c)
#2 0x000057752122a39f n/a (makemkvcon + 0x64739f)
#3 0x0000577521227e5e n/a (makemkvcon + 0x644e5e)
#4 0x000057752117e796 n/a (makemkvcon + 0x59b796)
#5 0x000057752117dd10 n/a (makemkvcon + 0x59ad10)
#6 0x000057752117b9de n/a (makemkvcon + 0x5989de)
#7 0x000057752117faef n/a (makemkvcon + 0x59caef)
#8 0x00005775211e1dd9 n/a (makemkvcon + 0x5fedd9)
#9 0x00005775211e1782 n/a (makemkvcon + 0x5fe782)
#10 0x00005775211e0edc n/a (makemkvcon + 0x5fdedc)
#11 0x0000577521275bf8 n/a (makemkvcon + 0x692bf8)
#12 0x0000577521276827 n/a (makemkvcon + 0x693827)
#13 0x000072a905a9cb84 start_thread (libc.so.6 + 0x9cb84)
#14 0x000072a905b29ecc __clone3 (libc.so.6 + 0x129ecc)

Stack trace of thread 7904:
#0 0x000072a905a98e51 __futex_abstimed_wait_common64 (libc.so.6 + 0x98e51)
#1 0x000072a905a9e883 __pthread_clockjoin_ex (libc.so.6 + 0x9e883)
#2 0x0000577521314c9f n/a (makemkvcon + 0x731c9f)
#3 0x000057752113d68e n/a (makemkvcon + 0x55a68e)
#4 0x000072a905a2a1ca __libc_start_call_main (libc.so.6 + 0x2a1ca)
#5 0x000072a905a2a28b __libc_start_main_impl (libc.so.6 + 0x2a28b)
#6 0x0000577520f69c61 n/a (makemkvcon + 0x386c61)

Stack trace of thread 7907:
#0 0x000072a905b1bd6a __GI___libc_read (libc.so.6 + 0x11bd6a)
#1 0x0000577521315ac7 n/a (makemkvcon + 0x732ac7)
#2 0x000072a905a9cb84 start_thread (libc.so.6 + 0x9cb84)
#3 0x000072a905b29ecc __clone3 (libc.so.6 + 0x129ecc)

Stack trace of thread 7906:
#0 0x000072a905a98e51 __futex_abstimed_wait_common64 (libc.so.6 + 0x98e51)
#1 0x000072a905aa4e73 __new_sem_wait_slow64 (libc.so.6 + 0xa4e73)
#2 0x00005775213159bb n/a (makemkvcon + 0x7329bb)
#3 0x0000577521315183 n/a (makemkvcon + 0x732183)
#4 0x000072a905a9cb84 start_thread (libc.so.6 + 0x9cb84)
#5 0x000072a905b29ecc __clone3 (libc.so.6 + 0x129ecc)

Stack trace of thread 7943:
#0 0x000072a905a98e51 __futex_abstimed_wait_common64 (libc.so.6 + 0x98e51)
#1 0x000072a905aa5098 __new_sem_wait_slow64 (libc.so.6 + 0xa5098)
#2 0x00005775212767f8 n/a (makemkvcon + 0x6937f8)
#3 0x000072a905a9cb84 start_thread (libc.so.6 + 0x9cb84)
#4 0x000072a905b29ecc __clone3 (libc.so.6 + 0x129ecc)

Stack trace of thread 7932:
#0 0x000072a905a98e51 __futex_abstimed_wait_common64 (libc.so.6 + 0x98e51)
#1 0x000072a905aa5098 __new_sem_wait_slow64 (libc.so.6 + 0xa5098)
#2 0x00005775212767f8 n/a (makemkvcon + 0x6937f8)
#3 0x000072a905a9cb84 start_thread (libc.so.6 + 0x9cb84)
#4 0x000072a905b29ecc __clone3 (libc.so.6 + 0x129ecc)

Stack trace of thread 7931:
#0 0x000072a905a98e51 __futex_abstimed_wait_common64 (libc.so.6 + 0x98e51)
#1 0x000072a905aa5098 __new_sem_wait_slow64 (libc.so.6 + 0xa5098)
#2 0x00005775212767f8 n/a (makemkvcon + 0x6937f8)
#3 0x000072a905a9cb84 start_thread (libc.so.6 + 0x9cb84)
#4 0x000072a905b29ecc __clone3 (libc.so.6 + 0x129ecc)
ELF object binary architecture: AMD x86-64

[takeshi2010]

I can confirm on ArchLinux (system fully up to date):

Code: Select all

segfault at 0 ip 0000563012aff422 sp 00007fe8147fda90 error 4 in makemkvcon[5a6422,5630128de000+3b9000] likely on CPU 0 (core 0, socket 0)
Code: e9 25 fe ff ff e8 ae 6b 19 00 cc cc cc cc cc cc cc cc cc cc cc cc cc cc 50 48 8b 87 98 00 00 00 48 8b 78 50 48 8b 07 ff 50 20 <48> 8b 08 48 89 c7 ff 51 18 0f b6 c0 c1 e0 04 59 c3 cc cc cc cc cc
Stack trace of thread 96459:
#0  0x0000563012aff422 n/a (makemkvcon + 0x5a7422)
#1  0x0000563012bb688c n/a (makemkvcon + 0x65e88c)
#2  0x0000563012b9f39f n/a (makemkvcon + 0x64739f)
#3  0x0000563012b9ce5e n/a (makemkvcon + 0x644e5e)
#4  0x0000563012af3796 n/a (makemkvcon + 0x59b796)
#5  0x0000563012af2d10 n/a (makemkvcon + 0x59ad10)
#6  0x0000563012af09de n/a (makemkvcon + 0x5989de)
#7  0x0000563012af4aef n/a (makemkvcon + 0x59caef)
#8  0x0000563012b56dd9 n/a (makemkvcon + 0x5fedd9)
#9  0x0000563012b56782 n/a (makemkvcon + 0x5fe782)
#10 0x0000563012b55edc n/a (makemkvcon + 0x5fdedc)
#11 0x0000563012beabf8 n/a (makemkvcon + 0x692bf8)
#12 0x0000563012beb827 n/a (makemkvcon + 0x693827)
#13 0x00007fe826a98042 n/a (libc.so.6 + 0x98042)
#14 0x00007fe826b2072c n/a (libc.so.6 + 0x12072c)

Stack trace of thread 96460:
#0  0x00007fe826aa08f2 n/a (libc.so.6 + 0xa08f2)
#1  0x00007fe826a94c79 n/a (libc.so.6 + 0x94c79)
#2  0x00007fe826aa05fb n/a (libc.so.6 + 0xa05fb)
#3  0x0000563012c8a9bb n/a (makemkvcon + 0x7329bb)
#4  0x0000563012c8a183 n/a (makemkvcon + 0x732183)
#5  0x00007fe826a98042 n/a (libc.so.6 + 0x98042)
#6  0x00007fe826b2072c n/a (libc.so.6 + 0x12072c)

Stack trace of thread 96462:
#0  0x00007fe826aa08f2 n/a (libc.so.6 + 0xa08f2)
#1  0x00007fe826a94c79 n/a (libc.so.6 + 0x94c79)
#2  0x00007fe826aa0800 n/a (libc.so.6 + 0xa0800)
#3  0x0000563012beb7f8 n/a (makemkvcon + 0x6937f8)
#4  0x00007fe826a98042 n/a (libc.so.6 + 0x98042)
#5  0x00007fe826b2072c n/a (libc.so.6 + 0x12072c)

Stack trace of thread 96458:
#0  0x00007fe826aa08f2 n/a (libc.so.6 + 0xa08f2)
#1  0x00007fe826a94c79 n/a (libc.so.6 + 0x94c79)
#2  0x00007fe826a99e8d n/a (libc.so.6 + 0x99e8d)
#3  0x0000563012c89c9f n/a (makemkvcon + 0x731c9f)
#4  0x0000563012ab268e n/a (makemkvcon + 0x55a68e)
#5  0x00007fe826a27781 n/a (libc.so.6 + 0x27781)
#6  0x00007fe826a278b9 __libc_start_main (libc.so.6 + 0x278b9)
#7  0x00005630128dec61 n/a (makemkvcon + 0x386c61)

Stack trace of thread 96461:
#0  0x00007fe826aa08f2 n/a (libc.so.6 + 0xa08f2)
#1  0x00007fe826b11ac2 read (libc.so.6 + 0x111ac2)
#2  0x0000563012c8aac7 n/a (makemkvcon + 0x732ac7)
#3  0x00007fe826a98042 n/a (libc.so.6 + 0x98042)
#4  0x00007fe826b2072c n/a (libc.so.6 + 0x12072c)

Stack trace of thread 96480:
#0  0x00007fe826aa08f2 n/a (libc.so.6 + 0xa08f2)
#1  0x00007fe826a94c79 n/a (libc.so.6 + 0x94c79)
#2  0x00007fe826aa0800 n/a (libc.so.6 + 0xa0800)
#3  0x0000563012beb7f8 n/a (makemkvcon + 0x6937f8)
#4  0x00007fe826a98042 n/a (libc.so.6 + 0x98042)
#5  0x00007fe826b2072c n/a (libc.so.6 + 0x12072c)
ELF object binary architecture: AMD x86-64

I'll be downgrading to 1.18.4 in the meantime. For those who have difficulty finding the old packages: https://makemkv.com/download/old/

PS: If you're like me, your Arch system is up-to-date and you have ffmpeg9.x. If that's the case, simply rebuilding the 1.18.4 version will not work. You need to get the ffmpeg9 patch from the latest version, copy the file to build directory next to the tarballs. Add it to the PKGBUILD in source and sha256sums, then add the prepare() step from the 2.0.0 PKGBUILD. Build and you're done.

[DukeFleed]

For those who, like me, use the Flatpak version, simply pin it to prevent it from updating to 2.0.0:

Code: Select all

flatpak mask com.makemkv.MakeMKV