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Description of problem: After connecting an external monitor, the screen starts flickering erratically. If I disconnect the external monitor, the screen no longer flickers. Version-Release number of selected component (if applicable): Fully up2date Fedora 24 with kernel-4.8.8-200.fc24.x86_64. How reproducible: Always. Steps to Reproduce: 1. Reboot the machine with kernel-4.8.8-200.fc24.x86_64. 2. Log into GNOME desktop. 3. Connect an external monitor and start some applications. Actual results: The screen is erratically flickering making the machine very hard to use. Expected results: The screen is steady (i.e. not flickering). Additional info: HP Zbook 15 G2 with BIOS version: M70 Ver. 01.15 Graphics card (abbreviated output of lscpi): 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Venus XT [Radeon HD 8870M / R9 M270X/M370X] (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device 2254 Flags: bus master, fast devsel, latency 0, IRQ 34 Memory at 70000000 (64-bit, prefetchable) [size=256M] Memory at c0200000 (64-bit, non-prefetchable) [size=256K] I/O ports at 5000 [size=256] Expansion ROM at 000c0000 [disabled] [size=128K] Capabilities: [48] Vendor Specific Information: Len=08 <?> Capabilities: [50] Power Management version 3 Capabilities: [58] Express Legacy Endpoint, MSI 00 Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?> Capabilities: [150] Advanced Error Reporting Capabilities: [200] #15 Capabilities: [270] #19 Kernel driver in use: radeon Kernel modules: radeon When the flickering is "happening", the following entries fill systemd's journal: Nov 26 10:25:37 tlinux64 /usr/libexec/gdm-x-session[2877]: (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip completion event has impossible msc 27475 < target_msc 27476 Nov 26 10:25:38 tlinux64 /usr/libexec/gdm-x-session[2877]: (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip completion event has impossible msc 27528 < target_msc 27529 Nov 26 10:25:38 tlinux64 /usr/libexec/gdm-x-session[2877]: (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip completion event has impossible msc 27536 < target_msc 27537 Nov 26 10:25:38 tlinux64 /usr/libexec/gdm-x-session[2877]: (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip completion event has impossible msc 27536 < target_msc 27537 Nov 26 10:25:44 tlinux64 /usr/libexec/gdm-x-session[2877]: (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip completion event has impossible msc 27843 < target_msc 27844 [ ... output trimmed ... ]
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There are 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 24 kernel bugs. Fedora 25 has now been rebased to 4.10.9-100.fc24. 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 26, and are still experiencing this issue, please change the version to Fedora 26. If you experience different issues, please open a new bug report for those.
*********** MASS BUG UPDATE ************** This bug is being closed with INSUFFICIENT_DATA as there has not been a response in 2 weeks. If you are still experiencing this issue, please reopen and attach the relevant data from the latest kernel you are running and any data that might have been requested previously.
This is still present with kernel-4.10.10-200.fc25.x86_64.
Created attachment 1276245 [details] Smartphone recording of the screen flickering problem
This message is a reminder that Fedora 25 is nearing its end of life. Approximately 4 (four) weeks from now Fedora will stop maintaining and issuing updates for Fedora 25. 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 '25'. 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 25 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 25 changed to end-of-life (EOL) status on 2017-12-12. Fedora 25 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.