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antonellocaroli
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PostPosted: Wed Aug 28, 2019 8:34 pm    Post subject: Rpi4 boot problems with ssh Reply with quote

Just took the rpi4.

compiled kernel, as stage I used the one obtained from a system that I use on rpi3b+

everything seems to be working, except that at startup it takes a long time to start ssh.

if I remove ssh from the boot, the boot process happens quickly.

When the system is booted, if I restart sshd manually, it will work regularly.

I don't understand what it depends on...
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antonellocaroli
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PostPosted: Fri Aug 30, 2019 2:02 pm    Post subject: Reply with quote

I solved by looking at this post
https://forums.gentoo.org/viewtopic-t-1101034.html

i.e. installing and putting on boot haveged.

However I do not explain why .... with rpi 3 it worked without this.

can it be a different kernel configuration?
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PostPosted: Fri Aug 30, 2019 2:30 pm    Post subject: Reply with quote

antonellocaroli,

The Pi has a hardware random number generator.
Why are you using haveged ?

Please post the entire Pi dmesg to a pastebin site.
wgetpaste works on the Pi.
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antonellocaroli
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PostPosted: Fri Aug 30, 2019 4:10 pm    Post subject: Reply with quote

NeddySeagoon wrote:
antonellocaroli,

The Pi has a hardware random number generator.
Why are you using haveged ?


I wouldn't want to use it,
but if I don't use it ssh delays the boot

NeddySeagoon wrote:
Please post the entire Pi dmesg to a pastebin site.
wgetpaste works on the Pi.


There he is:

http://dpaste.com/380WC4R
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PostPosted: Fri Aug 30, 2019 4:31 pm    Post subject: Reply with quote

antonellocaroli,

I don't use haveged and my dmesg shows
Code:
roy@Pi4_~arm64 ~ $ dmesg | grep random
[    0.000000] random: get_random_bytes called from start_kernel+0xa0/0x46c with crng_init=0
[    0.797633] random: fast init done
[    8.611458] random: lvm: uninitialized urandom read (4 bytes read)
[    8.633072] random: lvm: uninitialized urandom read (4 bytes read)
[    9.976258] random: lvm: uninitialized urandom read (4 bytes read)
[    9.992126] random: lvm: uninitialized urandom read (4 bytes read)
[   11.825230] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[   11.827267] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[   11.827301] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[   16.703880] random: crng init done
[   16.703888] random: 3 urandom warning(s) missed due to ratelimiting
roy@Pi4_~arm64 ~
the line
Code:
[   16.703880] random: crng init done
is the important one.
You get
Code:
[  165.086084] random: crng init done


sshd may block waiting for entropy.

We both have
Code:
[    0.472596] iproc-rng200 fe104000.rng: hwrng registered
That's the random number generator.

Please explain how you configure and build your kernel.
Include how you install all the bits too.

Maybe pastebin the .config file.
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antonellocaroli
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PostPosted: Fri Aug 30, 2019 4:52 pm    Post subject: Reply with quote

I compiled the kernel like this:

Code:
git clone -b stable --depth=1 https://github.com/raspberrypi/firmware
git clone https://github.com/raspberrypi/linux
cd linux/
ARCH=arm64 CROSS_COMPILE=aarch64-unknown-linux-gnu- make bcm2711_defconfig
ARCH=arm64 CROSS_COMPILE=aarch64-unknown-linux-gnu- make menuconfig  <---- I set only the governor to performance

ARCH=arm64 CROSS_COMPILE=aarch64-unknown-linux-gnu- make -j8


cp -rv /PATH-THO-FIRMWARE/firmware/boot/* /mnt/gentoo/boot
cp /PATH-SOURCE-KERNEL/linux/arch/arm64/boot/Image /mnt/gentoo/boot/kernel8.img
mv /mnt/gentoo/boot/bcm2711-rpi-4-b.dtb /mnt/gentoo/boot/bcm2711-rpi-4-b.dtb_32
cp /PATH-SOURCE-KERNEL/linux/arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b.dtb /mnt/gentoo/boot

cd /PATH-SOURCE-KERNEL/linux

ARCH=arm64 CROSS_COMPILE=aarch64-unknown-linux-gnu- make modules_install INSTALL_MOD_PATH=/mnt/gentoo

git clone https://github.com/raspberrypi/tools
cd tools/armstubs
make CC8=aarch64-unknown-linux-gnu-gcc LD8=aarch64-unknown-linux-gnu-ld OBJCOPY8=aarch64-unknown-linux-gnu-objcopy OBJDUMP8=aarch64-unknown-linux-gnu-objdump armstub8-gic.bin
cp armstub8-gic.bin /mnt/gentoo/boot


cmdline.txt

Code:
dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait


config.txt

Code:
arm_64bit=1
enable_gic=1
armstub=armstub8-gic.bin
gpu_mem=16
max_usb_current=1
dtparam=audio=off
audio_pwm_mode=2
disable_splash=1
hdmi_force_hotplug=1
dtparam=i2c_arm=on
dtoverlay=i-sabre-q2m
dtoverlay=pi4-disable-wifi
dtoverlay=pi4-disable-bt
#force_turbo=1
max_usb_current=1
disable_overscan=1
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PostPosted: Fri Aug 30, 2019 11:13 pm    Post subject: Reply with quote

antonellocaroli,

Comparing my .config with the default shows one difference in the random number generator.

Code:
 /usr/aarch64-unknown-linux-gnu/usr/src/pi_sources $ diff -U3 arch/arm64/configs/bcm2711_defconfig .config | grep CONFIG_HW_RANDOM_BCM2835=y
+CONFIG_HW_RANDOM_BCM2835=y



My Pi4 .config file. Its not useful to compare it directly to bcm2711_defconfig.
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antonellocaroli
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PostPosted: Sat Aug 31, 2019 6:01 am    Post subject: Reply with quote

NeddySeagoon wrote:
antonellocaroli,

Comparing my .config with the default shows one difference in the random number generator.

Code:
 /usr/aarch64-unknown-linux-gnu/usr/src/pi_sources $ diff -U3 arch/arm64/configs/bcm2711_defconfig .config | grep CONFIG_HW_RANDOM_BCM2835=y
+CONFIG_HW_RANDOM_BCM2835=y



My Pi4 .config file. Its not useful to compare it directly to bcm2711_defconfig.


Hi NeddySeagoon,

I tried your .config, but the problem remains.

the only difference with my config is this entry

Code:
CONFIG_BCM2835_TIMER=y


that I can't even find in my menuconfig to balance it.

but I don't think the problem is this (???)

I start to suspect that it doesn't depend on the kernel, or at least not on the configuration maybe on the version? mine is 4.19.69

my config is now this

http://dpaste.com/0TXWDJS.txt
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PostPosted: Sat Aug 31, 2019 1:43 pm    Post subject: Reply with quote

antonellocaroli,

The kernel has a search option. In menuconfig, press / and enter a symbol fragment. BCM2835_TIMER.
You will get a numbered list oy matches. Press the digit to go to the option.

If the option is not found, its hidden for some reason. Press the 'z' key to toggle the display of hidden options.
Repeat the search. Now you can go to the option and read its help to see what it Depends on:
The Depends on: boolean must be true or the option you want will be hidden.

While that's interesting, I agree that CONFIG_BCM2835_TIMER=y is unlikely to be your problem.

Look in /etc/ssh. You should have lots of ssh_host_* key pairs.

Code:
$ cd /etc/ssh/
roy@Pi4_~arm64 /etc/ssh $ ls -l
total 604
-rw-r--r-- 1 root root 577388 Jul  7 19:22 moduli
-rw-r--r-- 1 root root   1755 Jul  7 19:22 ssh_config
-rw------- 1 root root   3444 Aug 21  2018 sshd_config
-rw------- 1 root root    668 Apr  4  2016 ssh_host_dsa_key
-rw-r--r-- 1 root root    604 Apr  4  2016 ssh_host_dsa_key.pub
-rw------- 1 root root    227 Apr  4  2016 ssh_host_ecdsa_key
-rw-r--r-- 1 root root    176 Apr  4  2016 ssh_host_ecdsa_key.pub
-rw------- 1 root root    411 Apr  4  2016 ssh_host_ed25519_key
-rw-r--r-- 1 root root     96 Apr  4  2016 ssh_host_ed25519_key.pub
-rw------- 1 root root   1675 Apr  4  2016 ssh_host_rsa_key
-rw-r--r-- 1 root root    396 Apr  4  2016 ssh_host_rsa_key.pub

They are created the very first time that sshd starts and require a lot of entropy, so the first time that sshd starts it can take a long time.
What is the timestamp on your ssh_host_* keys?
If they are being recreated every time that sshd starts, that's a problem.
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antonellocaroli
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PostPosted: Sat Aug 31, 2019 3:15 pm    Post subject: Reply with quote

NeddySeagoon wrote:
antonellocaroli,

The kernel has a search option. In menuconfig, press / and enter a symbol fragment. BCM2835_TIMER.
You will get a numbered list oy matches. Press the digit to go to the option.

If the option is not found, its hidden for some reason. Press the 'z' key to toggle the display of hidden options.
Repeat the search. Now you can go to the option and read its help to see what it Depends on:
The Depends on: boolean must be true or the option you want will be hidden.

While that's interesting, I agree that CONFIG_BCM2835_TIMER=y is unlikely to be your problem.


actually do not know how to activate boolean...

Code:
- - BCM2835 timer driver                                                                                                     │ │ 
  │ │                                                      - - BCM mobile timer driver                                                                                                  │ │ 
  │ │                                                      - - Digicolor timer driver                                                                                                   │ │ 
  │ │                                                      - - DW APB timer driver                                                                                                      │ │ 
  │ │                                                      - - Faraday Technology timer driver                                                                                          │ │ 
  │ │                                                      - - Rockchip timer driver         




Code:
CONFIG_BCM2835_TIMER:                                                                                                                                                                 │ 
  │                                                                                                                                                                                       │ 
  │ Enables the support for the BCM2835 timer driver.                                                                                                                                     │ 
  │                                                                                                                                                                                       │ 
  │ Symbol: BCM2835_TIMER [=n]                                                                                                                                                            │ 
  │ Type  : bool                                                                                                                                                                          │ 
  │ Prompt: BCM2835 timer driver                                                                                                                                                          │ 
  │   Location:                                                                                                                                                                           │ 
  │     -> Device Drivers                                                                                                                                                                 │ 
  │       -> Clock Source drivers                                                                                                                                                         │ 
  │   Defined at drivers/clocksource/Kconfig:33                                                                                                                                           │ 
  │   Depends on: GENERIC_CLOCKEVENTS [=y]                                                                                                                                                │ 
  │   Selects: CLKSRC_MMIO [=y]       




NeddySeagoon wrote:
Look in /etc/ssh. You should have lots of ssh_host_* key pairs.

Code:
$ cd /etc/ssh/
roy@Pi4_~arm64 /etc/ssh $ ls -l
total 604
-rw-r--r-- 1 root root 577388 Jul  7 19:22 moduli
-rw-r--r-- 1 root root   1755 Jul  7 19:22 ssh_config
-rw------- 1 root root   3444 Aug 21  2018 sshd_config
-rw------- 1 root root    668 Apr  4  2016 ssh_host_dsa_key
-rw-r--r-- 1 root root    604 Apr  4  2016 ssh_host_dsa_key.pub
-rw------- 1 root root    227 Apr  4  2016 ssh_host_ecdsa_key
-rw-r--r-- 1 root root    176 Apr  4  2016 ssh_host_ecdsa_key.pub
-rw------- 1 root root    411 Apr  4  2016 ssh_host_ed25519_key
-rw-r--r-- 1 root root     96 Apr  4  2016 ssh_host_ed25519_key.pub
-rw------- 1 root root   1675 Apr  4  2016 ssh_host_rsa_key
-rw-r--r-- 1 root root    396 Apr  4  2016 ssh_host_rsa_key.pub

They are created the very first time that sshd starts and require a lot of entropy, so the first time that sshd starts it can take a long time.
What is the timestamp on your ssh_host_* keys?
If they are being recreated every time that sshd starts, that's a problem.


I've verified not regenerate those keys at every start...

but now I started from a clean stage3...and it works without any problems.

so sure is a problem of some files.

but the thing that makes me crazy is that the same system on rpi3 does not cause problems....

and the thing that makes me crazy even more is that I have to start again from the beginning to reconfigure the whole system.
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PostPosted: Sat Aug 31, 2019 5:37 pm    Post subject: Reply with quote

antonellocaroli,

Code:
  │ Symbol: BCM2835_TIMER [=n]                                                                                                                                                            │
  │ Type  : bool

bool means the symboly must be set to y or n. m is not supported.

Code:
Depends on: GENERIC_CLOCKEVENTS [=y]
is the boolean expression that must be true to be able to see and select the option.
That Depends on: is true.

In your post you have
Code:
- - BCM2835 timer driver
The
Code:
- -
means not selectable.

Your Gentoo software install is defined by the content of /etc/portage and your /var/lib/portage world file.
Given those,
Code:
emerge -e @world
will rebuild your software install.
You would still need to recreate all the user setup.
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antonellocaroli
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PostPosted: Sat Aug 31, 2019 5:51 pm    Post subject: Reply with quote

thanks NeddySeagoon!!!
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PostPosted: Sun Sep 01, 2019 7:30 am    Post subject: Reply with quote

So he started with the stage here:

http://distfiles.gentoo.org/experimental/arm64/



put it all on sd-card, insert it in the rpi, several restarts, everything works.

I modify the make.conf:

Code:
# These settings were set by the catalyst build script that automatically
# built this stage.
# Please consult /usr/share/portage/config/make.conf.example for a more
# detailed example.
#CFLAGS="-O2 -pipe"
#CFLAGS="-march=armv8-a+crc -mtune=cortex-a53 -ftree-vectorize -O2 -pipe -fomit-frame-pointer"
CFLAGS="-march=armv8-a+crc -mtune=cortex-a72 -ftree-vectorize -O2 -pipe -fomit-frame-pointer"
CXXFLAGS="${CFLAGS}"

# WARNING: Changing your CHOST is not something that should be done lightly.
# Please consult https://wiki.gentoo.org/wiki/Changing_the_CHOST_variable before changing.
CHOST="aarch64-unknown-linux-gnu"

# NOTE: This stage was built with the bindist Use flag enabled
PORTDIR="/usr/portage"
DISTDIR="/usr/portage/distfiles"
PKGDIR="/usr/portage/packages"

# This sets the language of build output to English.
# Please keep this setting intact when reporting bugs.
LC_MESSAGES=C
ACCEPT_KEYWORDS="~arm64"
MAKEOPTS="-j4"
CPU_FLAGS_ARM="edsp neon thumb vfp vfpv3 vfpv4 vfp-d32 crc32 v4 v5 v6 v7 v8 thumb2"
USE="alsa icu -consolekit -libressl -bindist -qt3support -qt4 -qt5 -X -introspection -pulseaudio -xscreensaver"
#bindist

PYTHON_TARGETS="python2_7 python3_6"
PYTHON_SINGLE_TARGET="python3_6"




I recompile the whole system

emerges -e @system @world


restart and the problem returns...I can't find the solution....
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PostPosted: Sun Sep 01, 2019 8:34 am    Post subject: Reply with quote

antonellocaroli,

That makes it easier to find, because it can be reproduced.
A few things to try.

Look at the output of
Code:
$ rc-update show

Does it include
Code:
hwclock | boot

If so, that's a problem as the Pi does not have a hardware clock.
Change that for swclock.
With hwclock, the clock is set to 1 Jan 1970 00:00:01 UTC, which is always wrong. Its always a step back in time.
swclock saves the time on shutdown and restores it on startup, so at least time never steps backwards.
If you don't run
Code:
ntp-client |      default
      ntpd |      default
you need to. ntp-client sets the Pis time from the internet and ntpd keeps the time correct.
Emerge net-misc/ntp if you need to.

Edit
Code:
/etc/rc.conf
find the section
Code:
# Set rc_interactive to "YES" and you'll be able to press the I key during
# boot so you can choose to start specific services. Set to "NO" to disable
# this feature. This feature is automatically disabled if rc_parallel is
# set to YES.
#rc_interactive="YES"

and uncomment the last line. Save the file.

When you reboot, you will have a new prompt early in the boot sequence but otherwise nothing will change.
The prompt is
Code:
Press I for Interactive ... 
I forget the last line.
Once you press the I key, the system will let you choose what services to start.
Skip only sshd and look to see if anything else is delayed.

Back in /etc/rc.conf, find
Code:
# rc_logger launches a logging daemon to log the entire rc process to
# /var/log/rc.log
# NOTE: Linux systems require the devfs service to be started before
# logging can take place and as such cannot log the sysinit runlevel.
#rc_logger="YES"
and uncomment the last line.
On reboot you will have a /var/log/rc.log file. Put that on a pastebin.
Do not use the Interactive login on this boot.
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PostPosted: Sun Sep 01, 2019 11:11 am    Post subject: Reply with quote

Enabling the interactive mode starts everything normally.

removing the interactive mode, the problem returns again, this is the log

http://dpaste.com/23N29WQ.txt
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PostPosted: Sun Sep 01, 2019 4:46 pm    Post subject: Reply with quote

this is the log, when starting interactively

http://dpaste.com/3CR1DDG.txt
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PostPosted: Sun Sep 01, 2019 4:50 pm    Post subject: Reply with quote

antonellocaroli,

Setting
Code:
rc_interactive="YES"
turns off rc_parallel, if you have it enabled' so that logging makes sense.

If you have rc_parallel="YES", set it to "NO".
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PostPosted: Sun Sep 01, 2019 5:02 pm    Post subject: Reply with quote

rc_parallel was commented,

now I've imposed it on "NO"

and this is the log with interactive startup:

http://dpaste.com/3DFFD8D.txt

interactive start immediately...

normal start there is a wait of about 3 min

Code:
rc default logging started at Sun Sep  1 12:57:03 2019

 * WARNING: clock skew detected!
 * Starting DHCP Client Daemon ...
 [ ok ]
 * Mounting network filesystems ...
 [ ok ]
 * Starting sshd ...
 [ ok ]
 * Starting local ...
 [ ok ]

rc default logging stopped at Sun Sep  1 12:59:48 2019
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NeddySeagoon
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PostPosted: Sun Sep 01, 2019 5:16 pm    Post subject: Reply with quote

antonellocaroli,

What do you have in /etc/local.d/ ?
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NeddySeagoon

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antonellocaroli
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PostPosted: Sun Sep 01, 2019 5:24 pm    Post subject: Reply with quote

NeddySeagoon wrote:
antonellocaroli,

What do you have in /etc/local.d/ ?


nothing

Code:

 ls -l /etc/local.d/
total 4
-rw-r--r-- 1 root root 652 Sep  1 02:29 README


but I'm pretty sure this is about ssh or something to do with...
since if I remove it from the boot function normally


if I take ssh off the boot

and I put its start in a file in local.d the problem remains...
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antonellocaroli
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PostPosted: Tue Sep 03, 2019 7:47 pm    Post subject: Reply with quote

the problem comes after this:

Code:
emerge --ask -1 net-misc/openssh

 * IMPORTANT: 6 news items need reading for repository 'gentoo'.
 * Use eselect news read to view new items.


These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  N     ] dev-util/re2c-1.2.1  USE="-debug"
[ebuild     U  ] dev-libs/libffi-3.3_rc0 [3.2.1]
[ebuild     U  ] virtual/libffi-3.3_rc0 [3.0.13-r1]
[ebuild  r  U  ] dev-libs/openssl-1.1.1c-r1 [1.0.2r] USE="-bindist* -sslv3* -tls-heartbeat*"
[ebuild  r  U  ] net-misc/wget-1.20.3-r2 [1.20.3-r1] USE="-cookie_check%"
[ebuild  rR    ] dev-libs/libevent-2.1.11
[ebuild  r  U  ] dev-lang/python-3.6.9 [3.6.5] USE="-bluetooth%"
[ebuild  r  U  ] dev-lang/python-2.7.16 [2.7.15]
[ebuild  rR    ] mail-mta/ssmtp-2.64-r3
[ebuild  r  U  ] net-misc/curl-7.65.3 [7.65.0] USE="progress-meter%*"
[ebuild  N     ] dev-util/ninja-1.9.0  USE="-doc -emacs -test -vim-syntax"
[ebuild     U  ] net-misc/openssh-8.0_p1-r2 [7.9_p1-r4] USE="-bindist*"
[ebuild  rR    ] net-misc/ntp-4.2.8_p13-r2
[ebuild  N     ] dev-util/meson-0.51.2  USE="-test" PYTHON_TARGETS="python3_6 -python3_5 (-python3_7)"
[ebuild  r  U  ] net-misc/iputils-20190709 [20180629] USE="nls%*"

The following packages are causing rebuilds:

  (dev-libs/openssl-1.1.1c-r1:0/1.1::gentoo, ebuild scheduled for merge) causes rebuilds for:
    (net-misc/curl-7.65.3:0/0::gentoo, ebuild scheduled for merge)
    (net-misc/wget-1.20.3-r2:0/0::gentoo, ebuild scheduled for merge)
    (net-misc/iputils-20190709:0/0::gentoo, ebuild scheduled for merge)
    (dev-libs/libevent-2.1.11:0/2.1-7::gentoo, ebuild scheduled for merge)
    (net-misc/ntp-4.2.8_p13-r2:0/0::gentoo, ebuild scheduled for merge)
    (dev-lang/python-2.7.16:2.7/2.7::gentoo, ebuild scheduled for merge)
    (dev-lang/python-3.6.9:3.6/3.6m::gentoo, ebuild scheduled for merge)
    (mail-mta/ssmtp-2.64-r3:0/0::gentoo, ebuild scheduled for merge)
  (virtual/libffi-3.3_rc0:0/7::gentoo, ebuild scheduled for merge) causes rebuilds for:
    (dev-lang/python-3.6.9:3.6/3.6m::gentoo, ebuild scheduled for merge)
    (dev-lang/python-2.7.16:2.7/2.7::gentoo, ebuild scheduled for merge)



the strange thing is that on rpi3 with the same "update" the problem does not occur....

where is the difference?
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antonellocaroli
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PostPosted: Thu Sep 05, 2019 4:38 pm    Post subject: Reply with quote

Is this entropy normal?

Code:

localhost ~ # cat /proc/sys/kernel/random/entropy_avail
90



can it be a problem hw?
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