January 2025 - openSUSE Kernel - openSUSE Mailing Lists

Disabling /dev/fb0 on TW
by Thomas Zimmermann 06 Feb '25

06 Feb '25

tl;dr: Disable fbdev userspace interfaces on TW Hi, the upcoming Linux kernel v6.6 will contain the option to disable fbdev userspace interfaces in the kernel configuration. [1] I intent to enable this and thereby switch off /dev/fb0 et al. The tracker bug is boo#1212947. [2] * Why? The old fbdev subsystem is an endless source of bugs. For example, we recently had an out-of-bounds access in the fbdev emulation, where userspace could write beyond the end of the framebuffer memory. [3] Fbdev is under-maintained. I've been doing improvements in recent kernel releases, but only where it benefits the DRM subsystem. Disabling fbdev userspace interfaces will also help weeding out any programs that still contain hard dependencies on them. * What changes? Enabling the new kernel option disables all fbdev userspace interfaces. These are * the device files, such as /dev/fb0 * the sys files under /sys/class/graphics/fb[0-9]+ * /proc/fb * What are the effects on userspace programs? Userspace applications run on the desktop via Wayland or X. There will be no change to them. Xorg and Wayland compositors run on DRM interfaces. A few programs run on SDL, which has no dependency on fbdev either. Any fbdev support in these mid-layer components should be disabled as well. There's one known affected program: TW's text-mode installer can use the tool fbiterm to display CJK symbols during installation. This comes from a time when some low-end systems where not able to boot graphics installation. fbiterm has been unmaintained for >15 years and is ready for retirement. But there's no good drop-in replacement. I propose to simply remove fbiterm and let the graphics installer handle CJK. * What about the framebuffer console? The kernel-provided framebuffer console does not change. The kernel will still show the regular console. Userspace interfaces in /sys/class/graphics/fbcon are still available. For questions and discussion, please comment here or in boo#1212947. Best regards Thomas [1] https://elixir.bootlin.com/linux/v6.6-rc1/source/drivers/video/fbdev/core/K… [2] https://bugzilla.opensuse.org/show_bug.cgi?id=1212947 [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)

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CONFIG_NET_CLS_CGROUP unset without warning in kernel 6.13.0
by Pavin Joseph 02 Feb '25

02 Feb '25

Hello everyone 👋 I was depending on the net_cls subsystem in cgroup v1 but the config was changed between stable kernel 6.12.9 and 6.13.0 to not include it! 🥲 pavin@suse-pc:~> cat /usr/lib/modules/6.12.9-1-default/config | grep CONFIG_NET_CLS_CGROUP CONFIG_NET_CLS_CGROUP=m pavin@suse-pc:~> cat /usr/lib/modules/6.13.0-1-default/config | grep CONFIG_NET_CLS_CGROUP # CONFIG_NET_CLS_CGROUP is not set Please, can this be added back with the next stable version? 🤔 Thanks, Pavin Joseph.

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[PATCH] master: config: arm64: CONFIG_USB_MUSB_DUAL_ROLE=y
by Matwey V. Kornilov 23 Jan '25

23 Jan '25

Make arm64 config consistent with armv7hl. OrangePi Zero 2W has USB configured in peripheral dr_mode, so we need to have its support in the module. --- config/arm64/default | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/config/arm64/default b/config/arm64/default index 72d7a93705f..3d1255a5209 100644 --- a/config/arm64/default +++ b/config/arm64/default @@ -9493,9 +9493,9 @@ CONFIG_USB_MTU3_HOST=y # CONFIG_USB_MTU3_DUAL_ROLE is not set # CONFIG_USB_MTU3_DEBUG is not set CONFIG_USB_MUSB_HDRC=m -CONFIG_USB_MUSB_HOST=y +# CONFIG_USB_MUSB_HOST is not set # CONFIG_USB_MUSB_GADGET is not set -# CONFIG_USB_MUSB_DUAL_ROLE is not set +CONFIG_USB_MUSB_DUAL_ROLE=y # # Platform Glue Layer -- 2.43.0

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Kernel:stable repository
by -pj 14 Jan '25

14 Jan '25

Hi, openSUSE Tumbleweed here. I am interested in installing Kernel:stable via OBS. The reason is for an amdgpu issue I brought up here :< https://bugzilla.suse.com/show_bug.cgi?id=1235668 Following the link here: https://build.opensuse.org/project/show/Kernel:stable Attempt to download repository path for x86_64 results in *error*. Following URL :< https://download.opensuse.org/repositories/Kernel:/stable/QA Shows: Resource is no longer available! The requested URL is no longer available on this server and there is no forwarding address. Please inform the author of the referring page that the link is outdated. If you think this is a server error, please contact the webmaster. Error 404 download.opensuse.org Apache How I can find the correct repository information for OBS Kernel:stable (64 bit machine here), so that I can add the repository? Then I can install kernel 6.12.9 to hopefully circumvent the particular amdgpu bug. -Regards

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