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rated 0 times [  1] [ 0]  / answers: 1 / hits: 482  / 2 Years ago, tue, january 25, 2022, 5:46:34

A month ago, I posted this topic regarding my laptop apparently freezing when updating on my home network. After prompting for password, nothing would display on my terminal. On any other network though, the computer would update perfectly fine. Not having time to dive more into that, I came to the conclusion that it was a driver issue and that I could be fixed with 19.04, so I waited.



I now have a bit more time to investigate and since switching to 19.04 (using my phone's hotspot) did not change anything im reaching back to you.



First thing I noticed is that the laptop is actually not frozen and is updating... It is just extremely slow.



To give you an idea, this is after waiting about 15 min. Each line took a while to finally appear, and it has been on that last one for an other 10min. After those 10mins, it unstuck itself by ignoring the next get stages :
enter image description here
It is not a network speed problem, here is the result of a speedtest while the update was running :enter image description here
Finally, this is not my box blocking the ubuntu server ports because my desktop, also running 19.04 with similar settings (especially as far as the update server to use and stuff) is updating perfectly fine on the same network.



Any idea ? If it can help, the issue is the same with both wired and wifi connections



EDIT : sitrep after 50mins of the update slowly progressing, note the extremely low download speedenter image description here



EDIT 2 : after research, sources.list is clean and server is not the issue. Here is the result of sudo strace apt update :



munmap(0x7fd0b81fc000, 2783)            = 0  

close(5)                                = 0  

geteuid()                               = 0  

getegid()                               = 0  

openat(AT_FDCWD, "/proc/sys/kernel/ngroups_max", O_RDONLY) = 5  

read(5, "65536

", 31)                  = 6  

close(5)                                = 0  

mmap(NULL, 266240, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)   = 0x7fd0b72d2000  

getgroups(65536, [0])                   = 1  

setgroups(1, [65534])                   = 0  

setresgid(-1, 65534, -1)                = 0  

setresuid(-1, 106, -1)                  = 0  

getpid()                                = 5250  

openat(AT_FDCWD, "/var/lib/apt/lists/partial/.apt-acquire-privs-test.9zhf7x", O_RDWR|O_CREAT|O_EXCL, 0600) = 5  

unlink("/var/lib/apt/lists/partial/.apt-acquire-privs-test.9zhf7x") = 0  

close(5)                                = 0  

getpid()                                = 5250  

openat(AT_FDCWD, "/var/lib/apt/lists/partial/.apt-acquire-privs-test.O5IFAd", O_RDWR|O_CREAT|O_EXCL, 0600) = 5  

unlink("/var/lib/apt/lists/partial/.apt-acquire-privs-test.O5IFAd") = 0

close(5)                                = 0  

getpid()                                = 5250  

openat(AT_FDCWD, "/var/lib/apt/lists/partial/.apt-acquire-privs-test.1Rjq4S", O_RDWR|O_CREAT|O_EXCL, 0600) = 5  

unlink("/var/lib/apt/lists/partial/.apt-acquire-privs-test.1Rjq4S") = 0  

close(5)                                = 0  

getpid()                                = 5250  

openat(AT_FDCWD, "/var/lib/apt/lists/partial/.apt-acquire-privs-test.Vl5byy", O_RDWR|O_CREAT|O_EXCL, 0600) = 5  

unlink("/var/lib/apt/lists/partial/.apt-acquire-privs-test.Vl5byy") = 0  

close(5)                                = 0  

getpid()                                = 5250  

openat(AT_FDCWD, "/var/lib/apt/lists/partial/.apt-acquire-privs-test.lV2Y1d", O_RDWR|O_CREAT|O_EXCL, 0600) = 5  

unlink("/var/lib/apt/lists/partial/.apt-acquire-privs-test.lV2Y1d") = 0  

close(5)                                = 0  

setresuid(-1, 0, -1)                    = 0  

setresgid(-1, 0, -1)                    = 0  

setgroups(1, [0])                       = 0  

munmap(0x7fd0b72d2000, 266240)          = 0  

stat("/usr/lib/apt/methods/http", {st_mode=S_IFREG|0755, st_size=174248, ...}) = 0  

pipe([5, 6])                            = 0  

pipe([7, 8])                            = 0  

fcntl(5, F_SETFD, FD_CLOEXEC)           = 0  

fcntl(6, F_SETFD, FD_CLOEXEC)           = 0  

fcntl(7, F_SETFD, FD_CLOEXEC)           = 0  

fcntl(8, F_SETFD, FD_CLOEXEC)           = 0  

clone(child_stack=NULL,  

flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fd0b78e5a50) = 5253  

fcntl(5, F_GETFL)                       = 0 (flags O_RDONLY)  

fcntl(5, F_SETFL, O_RDONLY|O_NONBLOCK)  = 0  

fcntl(8, F_GETFL)                       = 0x1 (flags O_WRONLY)  

fcntl(8, F_SETFL, O_WRONLY|O_NONBLOCK)  = 0  

close(6)                                = 0  

close(7)                                = 0  

select(6, [5], NULL, NULL, NULL)        = 1 (in [5])  

read(5, "100 Capabilities

Send-Config: tr"..., 64000) = 64  

faccessat(AT_FDCWD, "/usr/bin/auto-apt-proxy", R_OK|X_OK) = 0  

pipe([6, 7])                            = 0  

clone(child_stack=NULL, 

flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, 

child_tidptr=0x7fd0b78e5a50) = 5254  

close(7)                                = 0  

stat("/usr/bin/xz", {st_mode=S_IFREG|0755, st_size=80224, ...}) = 0  

stat("/usr/bin/zstd", 0x7fffb91cf5f0)   = -1 ENOENT (No such file or directory)  

stat("/usr/bin/lz4", 0x7fffb91cf5f0)    = -1 ENOENT (No such file or directory)  

stat("/bin/gzip", {st_mode=S_IFREG|0755, st_size=97336, ...}) = 0  

stat("/usr/bin/xz", {st_mode=S_IFREG|0755, st_size=80224, ...}) = 0  

stat("/bin/bzip2", {st_mode=S_IFREG|0755, st_size=38984, ...}) = 0  

stat("/usr/bin/xz", {st_mode=S_IFREG|0755, st_size=80224, ...}) = 0  

read(6, "", 4096)                       = 0  

--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5254, si_uid=106, si_status=0, si_utime=0, si_stime=0} ---

close(6)                                = 0  

wait4(5254, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 5254 

stat("/var/lib/apt/lists/archive.canonical.com_ubuntu_dists_disco_InRelease", 0x7fffb91cfc60) = -1 ENOENT (No such file or directory)  

stat("/var/lib/apt/lists/partial/archive.canonical.com_ubuntu_dists_disco_InRelease", 0x7fffb91cfd30) = -1 ENOENT (No such file or directory)

stat("/usr/lib/apt/methods/http", {st_mode=S_IFREG|0755, st_size=174248, ...}) = 0  

pipe([6, 7])                            = 0  

pipe([9, 10])                           = 0  

fcntl(6, F_SETFD, FD_CLOEXEC)           = 0  

fcntl(7, F_SETFD, FD_CLOEXEC)           = 0  

fcntl(9, F_SETFD, FD_CLOEXEC)           = 0  

fcntl(10, F_SETFD, FD_CLOEXEC)          = 0  

clone(child_stack=NULL,  

flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, 

child_tidptr=0x7fd0b78e5a50) = 6110  

fcntl(6, F_GETFL)                       = 0 (flags O_RDONLY)  

fcntl(6, F_SETFL, O_RDONLY|O_NONBLOCK)  = 0  

fcntl(10, F_GETFL)                      = 0x1 (flags O_WRONLY)  

fcntl(10, F_SETFL, O_WRONLY|O_NONBLOCK) = 0  

close(7)                                = 0  

close(9)                                = 0  

select(7, [6], NULL, NULL, NULL)        = 1 (in [6])  

read(6, "100 Capabilities

Send-Config: tr"..., 64000) = 64  

faccessat(AT_FDCWD, "/usr/bin/auto-apt-proxy", R_OK|X_OK) = 0  

pipe([7, 9])                            = 0  

clone(child_stack=NULL, 

flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fd0b78e5a50) = 6111  

close(9)                                = 0  

read(7, "", 4096)                       = 0  

--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=6111, si_uid=106, si_status=0, si_utime=0, si_stime=0} ---  

close(7)                                = 0  

wait4(6111, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 6111  

stat("/var/lib/apt/lists/fr.archive.ubuntu.com_ubuntu_dists_disco- updates_InRelease", 0x7fffb91cfc60) = -1 ENOENT (No such file or directory)  

stat("/var/lib/apt/lists/partial/fr.archive.ubuntu.com_ubuntu_dists_disco-updates_InRelease", 0x7fffb91cfd30) = -1 ENOENT (No such file or directory)  

faccessat(AT_FDCWD, "/usr/bin/auto-apt-proxy", R_OK|X_OK) = 0  

pipe([7, 9])                            = 0  

clone(child_stack=NULL, 

flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, 

child_tidptr=0x7fd0b78e5a50) = 6896  

close(9)                                = 0  

read(7, ^C0x55feeddd9900, 4096)           = ? ERESTARTSYS (To be restarted if SA_RESTART is set)


And the output of ifconfig | grep errors : 



    RX errors 0  dropped 0  overruns 0  frame 0

    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

    RX errors 0  dropped 0  overruns 0  frame 0

    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

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 Answers
5

Steps to investigate the problem



This might not necessarily be a problem with network.



Try disabling any custom repositories that you've used earlier - if you have any in /etc/apt/sources.list.d. One of them may cause issues.



In case you don't have any custom repositories you can try to use:



sudo apt-get clean


or backup your /var/lib/apt/lists and update cache again, like so:



sudo mkdir /var/lib/apt/lists.bak

sudo mv /var/lib/apt/lists/* /var/lib/apt/lists.bak

sudo apt-get update


In case the problem persists, try to switch to other ubuntu mirrors using Applications menu -> Updates -> Settings and go to first tab with ubuntu software. Change your download server to the country you're living in or any other.



OP case solution



After investigating the apt-get trough strace it was discovered that there is auto-apt-proxy package installed on OP's PC. Any kind of proxy may cause problem as such described in OP's question.



Solution was to basicly purge (uninstall) this package and reboot PC.



sudo apt-get purge auto-apt-proxy

[#5643] Wednesday, January 26, 2022, 2 Years  [reply] [flag answer]
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