The issue is happening because WSL is currently not POSIX compliant and any call to glibc that uses CLOCK_REALTIME will fail with EINVAL (-1) (such as clock_gettime() or clock_nanosleep()). It is likely that a glibc change has made this to appear (instead of the htop different version).
Upstream related bugs: https://github.com/microsoft/WSL/issues/2503 https://github.com/microsoft/WSL/issues/4898 <- opened and being worked -- htop strace output: 12324 read(4, "htop\0", 4096) = 5 12324 read(4, "", 4091) = 0 12324 close(4) = 0 12324 getdents64(3, /* 0 entries */, 32768) = 0 12324 close(3) = 0 12324 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=75000000}, 0x7ffff6dce7b0) = -1 EINVAL (Invalid argument) 12324 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=75000000}, 0x7ffff6dce7b0) = -1 EINVAL (Invalid argument) 12324 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=75000000}, 0x7ffff6dce7b0) = -1 EINVAL (Invalid argument) 12324 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=75000000}, 0x7ffff6dce7b0) = -1 EINVAL (Invalid argument) 12324 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=75000000}, 0x7ffff6dce7b0) = -1 EINVAL (Invalid argument) 12324 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=75000000}, 0x7ffff6dce7b0) = -1 EINVAL (Invalid argument) 12324 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=75000000}, 0x7ffff6dce7b0) = -1 EINVAL (Invalid argument) 12324 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=75000000}, 0x7ffff6dce7b0) = -1 EINVAL (Invalid argument) 12324 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=75000000}, 0x7ffff6dce7b0) = -1 EINVAL (Invalid argument) ... <indefinitely> -- As a workaround a software can use monotonic clock instead but changing glibc specific function clocks is likely a no-go at this point in time (specially if just for WSL). ** Bug watch added: github.com/microsoft/WSL/issues #2503 https://github.com/microsoft/WSL/issues/2503 ** Bug watch added: github.com/microsoft/WSL/issues #4898 https://github.com/microsoft/WSL/issues/4898 ** Also affects: glibc (Ubuntu) Importance: Undecided Status: New ** Changed in: glibc (Ubuntu) Status: New => Confirmed ** Changed in: glibc (Ubuntu) Importance: Undecided => Medium ** Changed in: htop (Ubuntu) Assignee: Rafael David Tinoco (rafaeldtinoco) => (unassigned) -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1871129 Title: htop is blank when using in focal in wsl1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1871129/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
