Public bug reported:
The Ubuntu install program is broken since 18.04 LTS. When selecting the
keyboard layout and testing it, everything works ok, but once the
installation commences and one can enter user name and password, always
the english keyboard is active again automatically. This is
Since 18.04 and 20.04 problem has dissappeared. 16.04 is close to end of
live, so I suggest closing this bug as obsolete.
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https://bugs.launchpad.net/bugs/1613996
Title:
30% slowdown
Bug appears to be related to software build and linked against different
version of libz:
Analysis:
Output of ld when trying to build an application that uses libpng16:
/usr/lib/x86_64-linux-gnu/libpng16.so.16: undefined reference to
`inflateReset2@ZLIB_1.2.3.4'
Performance drop workaround: using static compiler and linker flags
When compiling the solver with CXXFLAGS -static-libgcc -static-libstdc++
-static the solver is now slightly faster on Ubuntu 16.04 than with
Ubuntu 14.04. The issue appears to be related to dynamic linking of the
runtime
** Description changed:
I noticed that a numerical solver I develop runs much slower on 16.04.1
- than on 14.04. See for example this output:
+ than on 14.04.
- The counters (top part of each result section) show that the solver does
- the same on both variants. The timings (lower part,
** Package changed: ubuntu => gcc
** Also affects: glibc (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1613996
Title:
30% slowdown in numerical
ldd ./DelphinSolver gives:
linux-vdso.so.1 => (0x7ffdc833d000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
(0x7fbe9eee9000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x7fbe9ebe)
libgcc_s.so.1 =>
Public bug reported:
I noticed that a numerical solver I develop runs much slower on 16.04.1
than on 14.04. See for example this output:
The counters (top part of each result section) show that the solver does
the same on both variants. The timings (lower part, beginning with
