I tried 3.15.0-031500rc2_3.15.0-031500rc2.201404201435 and this issue is gone, but there are these errors that freeze X :
May 2 11:04:23 lisak nvidia-persistenced: Started (2206)
May 2 11:05:21 lisak kernel: [ 71.350777] apt-check[2392]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fff02f32fe8 error 14 in python3.4[400000+354000]
May 2 11:05:21 lisak kernel: [ 71.492139] apport[2393]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fffea07f428 error 14 in python3.4[400000+354000]
May 2 11:05:21 lisak kernel: [ 71.492162] Process 2393(apport) has RLIMIT_CORE set to 1
May 2 11:05:21 lisak kernel: [ 71.492164] Aborting core
May 2 11:05:23 lisak kernel: [ 73.351741] apport-checkrep[2396]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fff28a26378 error 14 in python3.4[400000+354000]
May 2 11:05:23 lisak kernel: [ 73.493450] apport[2397]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fffc1208e38 error 14 in python3.4[400000+354000]
May 2 11:05:23 lisak kernel: [ 73.493473] Process 2397(apport) has RLIMIT_CORE set to 1
May 2 11:05:23 lisak kernel: [ 73.493475] Aborting core
May 2 11:05:23 lisak kernel: [ 73.623298] apport-checkrep[2398]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fffb3c755c8 error 14 in python3.4[400000+354000]
May 2 11:05:24 lisak kernel: [ 73.764436] apport[2399]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fff1a649818 error 14 in python3.4[400000+354000]
May 2 11:05:24 lisak kernel: [ 73.764459] Process 2399(apport) has RLIMIT_CORE set to 1
May 2 11:05:24 lisak kernel: [ 73.764461] Aborting core
I tried 3.15.0- 031500rc2_ 3.15.0- 031500rc2. 201404201435 and this issue is gone, but there are these errors that freeze X :
May 2 11:04:23 lisak nvidia- persistenced: Started (2206) 4[400000+ 354000] 4[400000+ 354000] checkrep[ 2396]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fff28a26378 error 14 in python3. 4[400000+ 354000] 4[400000+ 354000] checkrep[ 2398]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fffb3c755c8 error 14 in python3. 4[400000+ 354000] 4[400000+ 354000]
May 2 11:05:21 lisak kernel: [ 71.350777] apt-check[2392]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fff02f32fe8 error 14 in python3.
May 2 11:05:21 lisak kernel: [ 71.492139] apport[2393]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fffea07f428 error 14 in python3.
May 2 11:05:21 lisak kernel: [ 71.492162] Process 2393(apport) has RLIMIT_CORE set to 1
May 2 11:05:21 lisak kernel: [ 71.492164] Aborting core
May 2 11:05:23 lisak kernel: [ 73.351741] apport-
May 2 11:05:23 lisak kernel: [ 73.493450] apport[2397]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fffc1208e38 error 14 in python3.
May 2 11:05:23 lisak kernel: [ 73.493473] Process 2397(apport) has RLIMIT_CORE set to 1
May 2 11:05:23 lisak kernel: [ 73.493475] Aborting core
May 2 11:05:23 lisak kernel: [ 73.623298] apport-
May 2 11:05:24 lisak kernel: [ 73.764436] apport[2399]: segfault at 17bf6 ip 0000000000017bf6 sp 00007fff1a649818 error 14 in python3.
May 2 11:05:24 lisak kernel: [ 73.764459] Process 2399(apport) has RLIMIT_CORE set to 1
May 2 11:05:24 lisak kernel: [ 73.764461] Aborting core
That might relate to issue https:/ /bugs.launchpad .net/ubuntu/ +source/ apport/ +bug/1299390