[Desktop-packages] [Bug 2074559] Re: [nouveau][Samsung SyncMaster] Top margin of secondary monitor covered with black flickering rectangle

2024-08-14 Thread Jackson Smith
Please see https://gitlab.gnome.org/GNOME/mutter/-/issues/3619 ** Bug watch added: gitlab.gnome.org/GNOME/mutter/-/issues #3619 https://gitlab.gnome.org/GNOME/mutter/-/issues/3619 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter

[Desktop-packages] [Bug 2074559] Re: [nouveau][Samsung SyncMaster] Top margin of secondary monitor covered with black flickering rectangle

2024-08-12 Thread Jackson Smith
I logged in with 'Ubuntu on Xorg' selected. There is no artefact when locking/unlocking the screen, or when changing refresh rates. The list of refresh rates is shorter, containing only 59.88, 100, 110, & 120Hz; seemingly in agreement with the edid data. -- You received this bug notification beca

[Desktop-packages] [Bug 2074559] Re: [nouveau][Samsung SyncMaster] Top margin of secondary monitor covered with black flickering rectangle

2024-08-09 Thread Jackson Smith
Thanks. I ran this: for e in /sys/class/drm/*/edid ; do echo -e "\n\n$e" ; edid-decode $e ; done > edid.txt So that the path is also copied in. I guess that /sys/class/drm/card0-DVI-D-1/edid is the interesting one because the DVI is connected to the offending SyncMaster. ** Attachment added: "e

[Desktop-packages] [Bug 2074559] Re: [nouveau][Samsung SyncMaster] Top margin of secondary monitor covered with black flickering rectangle

2024-08-07 Thread Jackson Smith
I wonder whether your observation about refresh rate isn't on the right track. The drop-down list in Settings > Displays > Samsung Electric Company 22" > Refresh Rate is as follows (in Hz): 120.00 110.00 100.00 89.94 59.95 59.88 The default setting is for 59.88Hz, where I get clipping. If I ch

[Desktop-packages] [Bug 2074559] Re: [nouveau][Samsung SyncMaster] Top margin of secondary monitor covered with black flickering rectangle

2024-08-06 Thread Jackson Smith
The Samsung SyncMaster 2233 does have a menu button that leads to an information panel which reports: 64.6kHz 60Hz PN 1680x1050 Alas, 'Adjust for TV' broke everything. I had to Alt + SysRq + REISUB, and reboot into recovery mode. Remounted the file system for read/write and removed ~/.config/moni

[Desktop-packages] [Bug 2074559] Re: [nouveau] Top margin of secondary monitor covered with black flickering rectangle

2024-08-05 Thread Jackson Smith
Sorry, you'd asked about that, before. My secondary monitor shows no signal if the resolution is anything but the maximum, native resolution of the screen. Changing the refresh rate may temporarily restore drawing to the full screen. However, locking the screen and then allowing it to sleep will

[Desktop-packages] [Bug 2074559] Re: [nouveau] Top margin of secondary monitor covered with black flickering rectangle

2024-08-05 Thread Jackson Smith
Just to be clear, I associate restarting gnome with logging out then logging in again. Not with unplugging the monitor and reconnecting. Concerning the present bug report, I'm becoming confident that the flickering black bar appears at the top of the secondary monitor after the following steps: 1

[Desktop-packages] [Bug 2074559] Re: [nouveau] Top margin of secondary monitor covered with black flickering rectangle

2024-08-05 Thread Jackson Smith
ps - I don't know whether this information was preserved in the original bug report, but it may be important. First, the secondary monitor is positioned to the left hand side, relative to the primary monitor. This was set by moving the small icon of the secondary monitor in Settings>Displays to th

[Desktop-packages] [Bug 2074559] Re: [nouveau] Top margin of secondary monitor covered with black flickering rectangle

2024-08-05 Thread Jackson Smith
The trigger may be when a) the screen is locked, and b) the screen blacks out. Logging back in after this leads to the flickering black rectangle at the top of the secondary monitor. This occurs without any use of SDL. Switching the monitor off and on does not fix the problem. Disconnecting and re

[Desktop-packages] [Bug 2074559] Re: [nouveau] Top margin of secondary monitor covered with black flickering rectangle

2024-07-30 Thread Jackson Smith
pps - there is also a correlation with locking and unlocking the screen via OS_Key + L. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2074559 Title: [nouveau] Top margin of secondary

[Desktop-packages] [Bug 2074559] Re: [nouveau] Top margin of secondary monitor covered with black flickering rectangle

2024-07-30 Thread Jackson Smith
The issue persists when MUTTER_DEBUG_FORCE_KMS_MODE=simple has been added to /etc/environment. Note that Wayland is enabled; that is, /etc/gdm3/custom.conf has commented out the line reading WaylandEnable=false. It may be relevant to note how the problem does not appear following a fresh reboot. T

[Desktop-packages] [Bug 2074559] Re: [nouveau] Top margin of secondary monitor covered with black flickering rectangle

2024-07-30 Thread Jackson Smith
ps - I should have mentioned that the program faults when using an older version of libSDL2-2.0.so.0. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2074559 Title: [nouveau] Top margin

[Desktop-packages] [Bug 2074559] [NEW] Top margin of secondary monitor covered with black flickering rectangle

2024-07-30 Thread Jackson Smith
Public bug reported: The system has two monitors. Workspaces are activated on the primary monitor, but not the second. A custom background image is used on both monitor desktops. Windows created on primary monitor then moved to secondary e.g. firefox. Window moved towards top of secondary monitor.

[Desktop-packages] [Bug 1765165] [NEW] nouveau module fails to load after switching from NVIDIA proprietary driver to Nouveau via Software & Updates > Additional Drivers

2018-04-18 Thread Jackson Smith
Public bug reported: Using Software & Updates > Additional Drivers to switch from NVIDIA driver 384.111 to Nouveau results in failure to load nouveau module. Instead, the system defaults to some backup video driver. Multiple monitors are plugged into the NVIDIA card but only one monitor appears to