Shutdown and reboot hang












1















9 times out of 10 my computer would take ≅ 2 minutes to shutdown or reboot. I tried many things like adding systemd and/or shutdown to initcpio hooks, but no luck.



reboot -f never hangs so I followed these steps to debug. After adding the options /proc/cmdline becomes



initrd=intel-ucode.img initrd=initramfs-linux.img root=PARTUUID=d596f77d-aafa-479f-ad3c-df9e7c91fc7b rw quiet systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M printk.devkmsg=on enforcing=0


and debug.sh



#!/bin/sh

mount -o remount,rw /

dmesg > /shutdown-log.txt

mount -o remount,ro /


To my surprise this greatly reduced the number of hangs but I managed to fill shutdown-log.txt on reboot: https://gist.github.com/MatTheCat/99498b006651110462f3488dcb454b40



Here is shutdown-log.txt when reboot is fine: https://gist.github.com/MatTheCat/77f168927008bb0b886bb944d19337f1



Computer is a Dell XPS 13 9380.



$ lspci

00:00.0 Host bridge: Intel Corporation Device 3e34 (rev 0b)

00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (Whiskey Lake)

00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0b)

00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model

00:12.0 Signal processing controller: Intel Corporation Cannon Point-LP Thermal Controller (rev 30)

00:14.0 USB controller: Intel Corporation Cannon Point-LP USB 3.1 xHCI Controller (rev 30)

00:14.2 RAM memory: Intel Corporation Cannon Point-LP Shared SRAM (rev 30)

00:15.0 Serial bus controller [0c80]: Intel Corporation Device 9de8 (rev 30)

00:15.1 Serial bus controller [0c80]: Intel Corporation Device 9de9 (rev 30)

00:16.0 Communication controller: Intel Corporation Cannon Point-LP MEI Controller (rev 30)

00:1c.0 PCI bridge: Intel Corporation Device 9dbe (rev f0)

00:1d.0 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port (rev f0)

00:1d.4 PCI bridge: Intel Corporation Device 9db4 (rev f0)

00:1f.0 ISA bridge: Intel Corporation Cannon Point-LP LPC Controller (rev 30)

00:1f.3 Audio device: Intel Corporation Cannon Point-LP High Definition Audio Controller (rev 30)

00:1f.4 SMBus: Intel Corporation Cannon Point-LP SMBus Controller (rev 30)

00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Point-LP SPI Controller (rev 30)

01:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)

02:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:01.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:02.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:04.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

04:00.0 System peripheral: Intel Corporation JHL6540 Thunderbolt 3 NHI (C step) [Alpine Ridge 4C 2016] (rev 02)

38:00.0 USB controller: Intel Corporation JHL6540 Thunderbolt 3 USB Controller (C step) [Alpine Ridge 4C 2016] (rev 02)

6d:00.0 Non-Volatile memory controller: SK hynix Device 1527



$ lsusb

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 001 Device 002: ID 0489:e0a2 Foxconn / Hon Hai 

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



Seems to match https://bugs.archlinux.org/index.php?do=details&task_id=50420 because of



[ 2144.333960] systemd-shutdown[1]: Sending SIGTERM to remaining

...

[ 2234.342297] systemd-shutdown[1]: Sending SIGKILL to PID 306 (lvmetad).


Investigating.






arch-linux lvm shutdown reboot







share|improve this question

























  • Please add to the question the out of cat /proc/cmdline

    – Rui F Ribeiro
    Mar 7 at 8:47











  • @RuiFRibeiro done

    – MatTheCat
    Mar 7 at 8:52











  • Nothing out of ordinary there. lspci and lsusb might be useful. Also model and brand of notebook

    – Rui F Ribeiro
    Mar 7 at 8:54











  • @RuiFRibeiro added

    – MatTheCat
    Mar 7 at 9:01











  • I reproduced the hang; seems to be random. I edited my question accordingly.

    – MatTheCat
    Mar 7 at 9:12
















1















9 times out of 10 my computer would take ≅ 2 minutes to shutdown or reboot. I tried many things like adding systemd and/or shutdown to initcpio hooks, but no luck.



reboot -f never hangs so I followed these steps to debug. After adding the options /proc/cmdline becomes



initrd=intel-ucode.img initrd=initramfs-linux.img root=PARTUUID=d596f77d-aafa-479f-ad3c-df9e7c91fc7b rw quiet systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M printk.devkmsg=on enforcing=0


and debug.sh



#!/bin/sh

mount -o remount,rw /

dmesg > /shutdown-log.txt

mount -o remount,ro /


To my surprise this greatly reduced the number of hangs but I managed to fill shutdown-log.txt on reboot: https://gist.github.com/MatTheCat/99498b006651110462f3488dcb454b40



Here is shutdown-log.txt when reboot is fine: https://gist.github.com/MatTheCat/77f168927008bb0b886bb944d19337f1



Computer is a Dell XPS 13 9380.



$ lspci

00:00.0 Host bridge: Intel Corporation Device 3e34 (rev 0b)

00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (Whiskey Lake)

00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0b)

00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model

00:12.0 Signal processing controller: Intel Corporation Cannon Point-LP Thermal Controller (rev 30)

00:14.0 USB controller: Intel Corporation Cannon Point-LP USB 3.1 xHCI Controller (rev 30)

00:14.2 RAM memory: Intel Corporation Cannon Point-LP Shared SRAM (rev 30)

00:15.0 Serial bus controller [0c80]: Intel Corporation Device 9de8 (rev 30)

00:15.1 Serial bus controller [0c80]: Intel Corporation Device 9de9 (rev 30)

00:16.0 Communication controller: Intel Corporation Cannon Point-LP MEI Controller (rev 30)

00:1c.0 PCI bridge: Intel Corporation Device 9dbe (rev f0)

00:1d.0 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port (rev f0)

00:1d.4 PCI bridge: Intel Corporation Device 9db4 (rev f0)

00:1f.0 ISA bridge: Intel Corporation Cannon Point-LP LPC Controller (rev 30)

00:1f.3 Audio device: Intel Corporation Cannon Point-LP High Definition Audio Controller (rev 30)

00:1f.4 SMBus: Intel Corporation Cannon Point-LP SMBus Controller (rev 30)

00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Point-LP SPI Controller (rev 30)

01:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)

02:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:01.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:02.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:04.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

04:00.0 System peripheral: Intel Corporation JHL6540 Thunderbolt 3 NHI (C step) [Alpine Ridge 4C 2016] (rev 02)

38:00.0 USB controller: Intel Corporation JHL6540 Thunderbolt 3 USB Controller (C step) [Alpine Ridge 4C 2016] (rev 02)

6d:00.0 Non-Volatile memory controller: SK hynix Device 1527



$ lsusb

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 001 Device 002: ID 0489:e0a2 Foxconn / Hon Hai 

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



Seems to match https://bugs.archlinux.org/index.php?do=details&task_id=50420 because of



[ 2144.333960] systemd-shutdown[1]: Sending SIGTERM to remaining

...

[ 2234.342297] systemd-shutdown[1]: Sending SIGKILL to PID 306 (lvmetad).


Investigating.






arch-linux lvm shutdown reboot







share|improve this question

























  • Please add to the question the out of cat /proc/cmdline

    – Rui F Ribeiro
    Mar 7 at 8:47











  • @RuiFRibeiro done

    – MatTheCat
    Mar 7 at 8:52











  • Nothing out of ordinary there. lspci and lsusb might be useful. Also model and brand of notebook

    – Rui F Ribeiro
    Mar 7 at 8:54











  • @RuiFRibeiro added

    – MatTheCat
    Mar 7 at 9:01











  • I reproduced the hang; seems to be random. I edited my question accordingly.

    – MatTheCat
    Mar 7 at 9:12














1












1








1


1






9 times out of 10 my computer would take ≅ 2 minutes to shutdown or reboot. I tried many things like adding systemd and/or shutdown to initcpio hooks, but no luck.



reboot -f never hangs so I followed these steps to debug. After adding the options /proc/cmdline becomes



initrd=intel-ucode.img initrd=initramfs-linux.img root=PARTUUID=d596f77d-aafa-479f-ad3c-df9e7c91fc7b rw quiet systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M printk.devkmsg=on enforcing=0


and debug.sh



#!/bin/sh

mount -o remount,rw /

dmesg > /shutdown-log.txt

mount -o remount,ro /


To my surprise this greatly reduced the number of hangs but I managed to fill shutdown-log.txt on reboot: https://gist.github.com/MatTheCat/99498b006651110462f3488dcb454b40



Here is shutdown-log.txt when reboot is fine: https://gist.github.com/MatTheCat/77f168927008bb0b886bb944d19337f1



Computer is a Dell XPS 13 9380.



$ lspci

00:00.0 Host bridge: Intel Corporation Device 3e34 (rev 0b)

00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (Whiskey Lake)

00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0b)

00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model

00:12.0 Signal processing controller: Intel Corporation Cannon Point-LP Thermal Controller (rev 30)

00:14.0 USB controller: Intel Corporation Cannon Point-LP USB 3.1 xHCI Controller (rev 30)

00:14.2 RAM memory: Intel Corporation Cannon Point-LP Shared SRAM (rev 30)

00:15.0 Serial bus controller [0c80]: Intel Corporation Device 9de8 (rev 30)

00:15.1 Serial bus controller [0c80]: Intel Corporation Device 9de9 (rev 30)

00:16.0 Communication controller: Intel Corporation Cannon Point-LP MEI Controller (rev 30)

00:1c.0 PCI bridge: Intel Corporation Device 9dbe (rev f0)

00:1d.0 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port (rev f0)

00:1d.4 PCI bridge: Intel Corporation Device 9db4 (rev f0)

00:1f.0 ISA bridge: Intel Corporation Cannon Point-LP LPC Controller (rev 30)

00:1f.3 Audio device: Intel Corporation Cannon Point-LP High Definition Audio Controller (rev 30)

00:1f.4 SMBus: Intel Corporation Cannon Point-LP SMBus Controller (rev 30)

00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Point-LP SPI Controller (rev 30)

01:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)

02:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:01.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:02.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:04.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

04:00.0 System peripheral: Intel Corporation JHL6540 Thunderbolt 3 NHI (C step) [Alpine Ridge 4C 2016] (rev 02)

38:00.0 USB controller: Intel Corporation JHL6540 Thunderbolt 3 USB Controller (C step) [Alpine Ridge 4C 2016] (rev 02)

6d:00.0 Non-Volatile memory controller: SK hynix Device 1527



$ lsusb

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 001 Device 002: ID 0489:e0a2 Foxconn / Hon Hai 

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



Seems to match https://bugs.archlinux.org/index.php?do=details&task_id=50420 because of



[ 2144.333960] systemd-shutdown[1]: Sending SIGTERM to remaining

...

[ 2234.342297] systemd-shutdown[1]: Sending SIGKILL to PID 306 (lvmetad).


Investigating.






arch-linux lvm shutdown reboot







share|improve this question
















9 times out of 10 my computer would take ≅ 2 minutes to shutdown or reboot. I tried many things like adding systemd and/or shutdown to initcpio hooks, but no luck.



reboot -f never hangs so I followed these steps to debug. After adding the options /proc/cmdline becomes



initrd=intel-ucode.img initrd=initramfs-linux.img root=PARTUUID=d596f77d-aafa-479f-ad3c-df9e7c91fc7b rw quiet systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M printk.devkmsg=on enforcing=0


and debug.sh



#!/bin/sh

mount -o remount,rw /

dmesg > /shutdown-log.txt

mount -o remount,ro /


To my surprise this greatly reduced the number of hangs but I managed to fill shutdown-log.txt on reboot: https://gist.github.com/MatTheCat/99498b006651110462f3488dcb454b40



Here is shutdown-log.txt when reboot is fine: https://gist.github.com/MatTheCat/77f168927008bb0b886bb944d19337f1



Computer is a Dell XPS 13 9380.



$ lspci

00:00.0 Host bridge: Intel Corporation Device 3e34 (rev 0b)

00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (Whiskey Lake)

00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0b)

00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model

00:12.0 Signal processing controller: Intel Corporation Cannon Point-LP Thermal Controller (rev 30)

00:14.0 USB controller: Intel Corporation Cannon Point-LP USB 3.1 xHCI Controller (rev 30)

00:14.2 RAM memory: Intel Corporation Cannon Point-LP Shared SRAM (rev 30)

00:15.0 Serial bus controller [0c80]: Intel Corporation Device 9de8 (rev 30)

00:15.1 Serial bus controller [0c80]: Intel Corporation Device 9de9 (rev 30)

00:16.0 Communication controller: Intel Corporation Cannon Point-LP MEI Controller (rev 30)

00:1c.0 PCI bridge: Intel Corporation Device 9dbe (rev f0)

00:1d.0 PCI bridge: Intel Corporation Cannon Point-LP PCI Express Root Port (rev f0)

00:1d.4 PCI bridge: Intel Corporation Device 9db4 (rev f0)

00:1f.0 ISA bridge: Intel Corporation Cannon Point-LP LPC Controller (rev 30)

00:1f.3 Audio device: Intel Corporation Cannon Point-LP High Definition Audio Controller (rev 30)

00:1f.4 SMBus: Intel Corporation Cannon Point-LP SMBus Controller (rev 30)

00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Point-LP SPI Controller (rev 30)

01:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)

02:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:01.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:02.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

03:04.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)

04:00.0 System peripheral: Intel Corporation JHL6540 Thunderbolt 3 NHI (C step) [Alpine Ridge 4C 2016] (rev 02)

38:00.0 USB controller: Intel Corporation JHL6540 Thunderbolt 3 USB Controller (C step) [Alpine Ridge 4C 2016] (rev 02)

6d:00.0 Non-Volatile memory controller: SK hynix Device 1527



$ lsusb

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 001 Device 002: ID 0489:e0a2 Foxconn / Hon Hai 

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



Seems to match https://bugs.archlinux.org/index.php?do=details&task_id=50420 because of



[ 2144.333960] systemd-shutdown[1]: Sending SIGTERM to remaining

...

[ 2234.342297] systemd-shutdown[1]: Sending SIGKILL to PID 306 (lvmetad).


Investigating.






arch-linux lvm shutdown reboot




arch-linux lvm shutdown reboot






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 7 at 23:35







MatTheCat

















asked Mar 7 at 8:44









MatTheCatMatTheCat

637




637













  • Please add to the question the out of cat /proc/cmdline

    – Rui F Ribeiro
    Mar 7 at 8:47











  • @RuiFRibeiro done

    – MatTheCat
    Mar 7 at 8:52











  • Nothing out of ordinary there. lspci and lsusb might be useful. Also model and brand of notebook

    – Rui F Ribeiro
    Mar 7 at 8:54











  • @RuiFRibeiro added

    – MatTheCat
    Mar 7 at 9:01











  • I reproduced the hang; seems to be random. I edited my question accordingly.

    – MatTheCat
    Mar 7 at 9:12



















  • Please add to the question the out of cat /proc/cmdline

    – Rui F Ribeiro
    Mar 7 at 8:47











  • @RuiFRibeiro done

    – MatTheCat
    Mar 7 at 8:52











  • Nothing out of ordinary there. lspci and lsusb might be useful. Also model and brand of notebook

    – Rui F Ribeiro
    Mar 7 at 8:54











  • @RuiFRibeiro added

    – MatTheCat
    Mar 7 at 9:01











  • I reproduced the hang; seems to be random. I edited my question accordingly.

    – MatTheCat
    Mar 7 at 9:12

















Please add to the question the out of cat /proc/cmdline

– Rui F Ribeiro
Mar 7 at 8:47





Please add to the question the out of cat /proc/cmdline

– Rui F Ribeiro
Mar 7 at 8:47













@RuiFRibeiro done

– MatTheCat
Mar 7 at 8:52





@RuiFRibeiro done

– MatTheCat
Mar 7 at 8:52













Nothing out of ordinary there. lspci and lsusb might be useful. Also model and brand of notebook

– Rui F Ribeiro
Mar 7 at 8:54





Nothing out of ordinary there. lspci and lsusb might be useful. Also model and brand of notebook

– Rui F Ribeiro
Mar 7 at 8:54













@RuiFRibeiro added

– MatTheCat
Mar 7 at 9:01





@RuiFRibeiro added

– MatTheCat
Mar 7 at 9:01













I reproduced the hang; seems to be random. I edited my question accordingly.

– MatTheCat
Mar 7 at 9:12





I reproduced the hang; seems to be random. I edited my question accordingly.

– MatTheCat
Mar 7 at 9:12










1 Answer
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oldest

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0














Setting use_lvmetad to 0 instead of 1 in /etc/lvm/lvm.conf works around the issue. I have no idea what's going on so I just hope this won't cause any issue since I'm not using LVM.



I'm still open to any explanation.






share|improve this answer
























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    Setting use_lvmetad to 0 instead of 1 in /etc/lvm/lvm.conf works around the issue. I have no idea what's going on so I just hope this won't cause any issue since I'm not using LVM.



    I'm still open to any explanation.






    share|improve this answer




























      0














      Setting use_lvmetad to 0 instead of 1 in /etc/lvm/lvm.conf works around the issue. I have no idea what's going on so I just hope this won't cause any issue since I'm not using LVM.



      I'm still open to any explanation.






      share|improve this answer


























        0












        0








        0







        Setting use_lvmetad to 0 instead of 1 in /etc/lvm/lvm.conf works around the issue. I have no idea what's going on so I just hope this won't cause any issue since I'm not using LVM.



        I'm still open to any explanation.






        share|improve this answer













        Setting use_lvmetad to 0 instead of 1 in /etc/lvm/lvm.conf works around the issue. I have no idea what's going on so I just hope this won't cause any issue since I'm not using LVM.



        I'm still open to any explanation.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Mar 7 at 15:04









        MatTheCatMatTheCat

        637




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            Is this a new Fibonacci Identity?

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            6 1 $begingroup$ I have found the following Fibonacci Identity (and proved it). If $F_n$ denotes the nth Fibonacci Number, we have the following identity begin{equation} F_{n-r+h}F_{n+k+g+1} - F_{n-r+g}F_{n+k+h+1} = (-1)^{n+r+h+1} F_{g-h}F_{k+r+1} end{equation} where $F_1 = F_2 = 1$ , $r leq n$ , $h leq g$ , and $n, g, k in mathbb{N}$ . It is not too hard to show that this identity subsumes Cassini's Identity, Catalan's Identity, Vajda's Idenity, and d'Ocagne's identity to name a few. I have done a pretty thorough literature review, and I have not found anything like this, but I am still wondering if anyone has seen this identity before? I found this by accident after noticing some patterns in some analysis work I was doing, so if this is already known I would be curious to see w...
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            19世紀

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            この記事は検証可能な参考文献や出典が全く示されていないか、不十分です。 出典を追加して記事の信頼性向上にご協力ください。 （ 2012年3月 ） 千年紀: 2千年紀 世紀: 18世紀 - 19世紀 - 20世紀 十年紀: 1800年代 1810年代 1820年代 1830年代 1840年代 1850年代 1860年代 1870年代 1880年代 1890年代 19世紀に君臨した大英帝国。 19世紀 （じゅうきゅうせいき）は、西暦1801年から西暦1900年までの100年間を指す世紀。 目次 1 19世紀の歴史 1.1 国民国家の成立 1.2 帝国主義の興隆 1.3 列強の植民地争奪戦 2 できごと 2.1 1800年代 2.2 1810年代 2.3 1820年代 2.4 1830年代 2.5 1840年代 2.6 1850年代 2.7 1860年代 2.8 1870年代 2.9 1880年代 2.10 1890年代 2.11 1900年代 3 文化 3.1 文学 3.2 音楽 3.3 思想 3.4 科学 3.5 技術 4 人物 4.1 ヨーロッパ 4.1.1 政治家・王族 4.1.1.1 フランス 4.1.1.2 オーストリア＝ハンガリー 4.1.1.3 ロシア 4.1.1.4 イギリス 4.1.1.5 ドイツ（プロイセンほかドイツ領邦を含む） 4.1.1.6 北欧 4.1.1.7 イタリア 4.1.1.8 スペイン 4.1.1.9 ベルギー 4.1.1.10 ギリシア 4.1.2 軍人 4.1.3 実業家 4.1.4 科学と技術 4.1.5 思想と哲学・人文諸学 4.1.6 宗教 4.1.7 文学 4.1.8 美術 4.1.9 音楽 4.1.10 社会事業家 4.1.11 探検家・旅行家 4.1.12 料...
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