[Bug 1190200] New: Severe graphics glitches in KDE applications when compositor is disabled
http://bugzilla.opensuse.org/show_bug.cgi?id=1190200 Bug ID: 1190200 Summary: Severe graphics glitches in KDE applications when compositor is disabled Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: Other OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Kernel Assignee: kernel-bugs@opensuse.org Reporter: psychonaut@nothingisreal.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- I normally run KDE with the compositor disabled. In this mode, all KDE applications exhibit severe screen corruption: all new text or graphics that appear have a garbled appearance, to the extent that text is completely illegible. The corruption sometimes disappears after a few seconds or after the window is scrolled. The problem does not affect GTK+ applications. The problem can be worked around by using systemsettings5 to tell KDE to enable the compositor at startup. However, simply changing the rendering backend (XRender vs. OpenGL) has no effect. I am using an onboard Intel HD Graphics 630 controller with the i915 driver. I'm not sure if it's the kernel driver/firmware which is causing the problem, but based on past experience with Intel graphics glitches, I am tentatively assuming it is. The problem occurred after updating Tumbleweed from version 20210810 to version 20210827. (In case it's relevant, this included an update of kernel-default 5.13.8 to 5.13.12, and from kernel-firmware-i915 from 20210719 to 20210812.) The problem persists in version 20210830. Booting from the old 5.13.8 kernel doesn't work around the problem. I could also try reverting kernel-firmware-i915 if I can find or build an old package. -- You are receiving this mail because: You are on the CC list for the bug.
http://bugzilla.opensuse.org/show_bug.cgi?id=1190200 http://bugzilla.opensuse.org/show_bug.cgi?id=1190200#c1 --- Comment #1 from Tristan Miller <psychonaut@nothingisreal.com> --- I just built and installed my own copy of kernel-firmware-20210719 (by branching <https://build.opensuse.org/package/show/openSUSE:Factory/kernel-firmware?rev=168>) and unfortunately this doesn't fix the problem. I'm open to further suggestions for troubleshooting. -- You are receiving this mail because: You are on the CC list for the bug.
http://bugzilla.opensuse.org/show_bug.cgi?id=1190200 http://bugzilla.opensuse.org/show_bug.cgi?id=1190200#c2 Felix Miata <mrmazda@earthlink.net> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mrmazda@earthlink.net --- Comment #2 from Felix Miata <mrmazda@earthlink.net> --- # inxi -CS System: Host: gb250 Kernel: 5.13.13-1-default x86_64 bits: 64 Console: tty pts/3 Distro: openSUSE Tumbleweed 20210831 CPU: Info: Dual Core model: Intel Core i3-7100T bits: 64 type: MT MCP cache: L2: 3 MiB Speed: 800 MHz min/max: 800/3400 MHz Core speeds (MHz): 1: 800 2: 800 3: 800 4: 800 # inxi -Gay Graphics: Device-1: Intel HD Graphics 630 vendor: Gigabyte driver: i915 v: kernel bus-ID: 00:02.0 chip-ID: 8086:5912 class-ID: 0300 Display: x11 server: X.Org 1.20.13 compositor: kwin_x11 driver: loaded: modesetting unloaded: fbdev,vesa alternate: intel display-ID: :0 screens: 1 Screen-1: 0 s-res: 1920x1200 s-dpi: 120 s-size: 406x254mm (16.0x10.0") s-diag: 479mm (18.9") Monitor-1: DP-1 res: 1920x1200 hz: 60 dpi: 94 size: 519x324mm (20.4x12.8") diag: 612mm (24.1") OpenGL: renderer: Mesa Intel HD Graphics 630 (KBL GT2) v: 4.6 Mesa 21.2.0 direct render: Yes I normally keep compositor disabled in all Plasma installations, which includes host gb250. The only text corruption I've seen as yet is a little bit of horizontal lines for a second or two after selecting some text in Konsole, then selecting edit > copy from the menu bar. It is repeatable. The corruption is approximately limited to the area defined by the edit > copy menu space. Other corruption I found was in system settings > compositor, which on first mouseover the content area the various fields overlaid each other until I forced a redraw, but the text in the fields was normal where not hidden by overlay. This too is repeatable by closing systemsettings5 before trying again. -- You are receiving this mail because: You are on the CC list for the bug.
http://bugzilla.opensuse.org/show_bug.cgi?id=1190200 http://bugzilla.opensuse.org/show_bug.cgi?id=1190200#c4 --- Comment #4 from Tristan Miller <psychonaut@nothingisreal.com> --- Just upgraded from openSUSE 20211008 to 20211031, which included an update from kernel-default 5.14.9 to 5.14.14. The problem is now worse: the glitches appear even when the compositor is enabled. -- You are receiving this mail because: You are on the CC list for the bug.
http://bugzilla.opensuse.org/show_bug.cgi?id=1190200 http://bugzilla.opensuse.org/show_bug.cgi?id=1190200#c5 --- Comment #5 from Tristan Miller <psychonaut@nothingisreal.com> --- (In reply to Tristan Miller from comment #4)
Just upgraded from openSUSE 20211008 to 20211031, which included an update from kernel-default 5.14.9 to 5.14.14. The problem is now worse: the glitches appear even when the compositor is enabled.
Booting from the old 5.14.9 kernel doesn't work around the glitching problem, but booting from the old read-only snapshot does. Also, I've found that the glitching can be avoided by running a Wayland desktop instead of X11. (In reply to Takashi Iwai from comment #3)
Dup of bug 1190095?
I'm not sure; the symptoms reported are similar but still different. Bug 1190095 talks about a "slow redraw" where the screen glitches for a moment and then fixes itself. But in my case, I wouldn't say that the redraw is "slow"; the glitches appear instantaneously when a screen area changes (e.g., via scrolling), and they generally persist until I force that area of the screen to change again, at which point the glitching either changes or (if I'm lucky) disappears. -- You are receiving this mail because: You are on the CC list for the bug.
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