Additional info: reporter: libreport-2.3.0 WARNING: CPU: 0 PID: 100 at kernel/sched/core.c:7331 __might_sleep+0x87/0x90() do not call blocking ops when !TASK_RUNNING; state=2 set at [<ffffffff811012ed>] prepare_to_wait_event+0x5d/0x100 Modules linked in: rtsx_pci_sdmmc mmc_core i915(+) crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel i2c_algo_bit drm_kms_helper e1000e drm rtsx_pci mfd_core ptp pps_core video uas usb_storage CPU: 0 PID: 100 Comm: kworker/0:3 Not tainted 3.19.3-200.fc21.x86_64+debug #1 Hardware name: Hewlett-Packard HP EliteBook 840 G1/198F, BIOS L71 Ver. 01.30 12/09/2014 Workqueue: events_long drm_dp_mst_link_probe_work [drm_kms_helper] 0000000000000000 000000004553dd3a ffff88032b2f7a88 ffffffff8186eccc 0000000000000000 ffff88032b2f7ae0 ffff88032b2f7ac8 ffffffff810ad81a ffff88032df407d0 ffffffff81c76a71 000000000000026d 0000000000000000 Call Trace: [<ffffffff8186eccc>] dump_stack+0x4c/0x65 [<ffffffff810ad81a>] warn_slowpath_common+0x8a/0xc0 [<ffffffff810ad8a5>] warn_slowpath_fmt+0x55/0x70 [<ffffffff8102991a>] ? native_sched_clock+0x2a/0xa0 [<ffffffff811012ed>] ? prepare_to_wait_event+0x5d/0x100 [<ffffffff811012ed>] ? prepare_to_wait_event+0x5d/0x100 [<ffffffff810ddda7>] __might_sleep+0x87/0x90 [<ffffffff81873ead>] mutex_lock_nested+0x3d/0x440 [<ffffffff8110dd6d>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8110131f>] ? prepare_to_wait_event+0x8f/0x100 [<ffffffffa0108b56>] drm_dp_mst_wait_tx_reply+0xb6/0x240 [drm_kms_helper] [<ffffffff811011d0>] ? wait_woken+0xa0/0xa0 [<ffffffffa010b9b1>] drm_dp_send_link_address+0x61/0x240 [drm_kms_helper] [<ffffffffa010c08d>] drm_dp_check_and_send_link_address+0x8d/0xa0 [drm_kms_helper] [<ffffffffa010c0bc>] drm_dp_mst_link_probe_work+0x1c/0x20 [drm_kms_helper] [<ffffffff810ce8a5>] process_one_work+0x215/0x830 [<ffffffff810ce80e>] ? process_one_work+0x17e/0x830 [<ffffffff810cef9a>] ? worker_thread+0xda/0x470 [<ffffffff810cef13>] worker_thread+0x53/0x470 [<ffffffff810ceec0>] ? process_one_work+0x830/0x830 [<ffffffff810d5344>] kthread+0x104/0x120 [<ffffffff810eb5e5>] ? local_clock+0x25/0x30 [<ffffffff810d5240>] ? kthread_create_on_node+0x250/0x250 [<ffffffff81878b58>] ret_from_fork+0x58/0x90 [<ffffffff810d5240>] ? kthread_create_on_node+0x250/0x250
Created attachment 1018222 [details] File: dmesg
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 21 kernel bugs. Fedora 21 has now been rebased to 3.19.5-200.fc21. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 22, and are still experiencing this issue, please change the version to Fedora 22. If you experience different issues, please open a new bug report for those.
This message is a reminder that Fedora 21 is nearing its end of life. Approximately 4 (four) weeks from now Fedora will stop maintaining and issuing updates for Fedora 21. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '21'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 21 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Fedora 21 changed to end-of-life (EOL) status on 2015-12-01. Fedora 21 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.