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e38c23e5b8
Linux kernel v6.9 has changed the symlink to point to the parent device. This
breaks fbdev_open() detection logic. Change it to use the subsystem symlink
instead which will remain stable.
Kernel v6.8:
[ 14.067] (II) fbdev_open() sysfs_path=/sys/class/graphics/fb0
[ 14.067] (II) fbdev_open() buf=../../devices/platform/vesa-framebuffer.0/graphics/fb0
Kernel v6.9:
[ 15.609] (II) fbdev_open() sysfs_path=/sys/class/graphics/fb0
[ 15.609] (II) fbdev_open() buf=../../devices/pci0000:00/0000:00:01.0/vesa-framebuffer.0/graphics/fb0
Originally found in automated Debian ISO QA testing [0] and confirmed in Linux [1].
Tested on kernels v6.9.7 and v6.8.12
[0] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1075713
[1] https://lore.kernel.org/lkml/lLyvPFC_APGHNfyGNHRpQy5izBikkaTPOpHooZIT3fFAoJPquSI31ZMueA99XTdr8ysir3X7O7IMdc6za-0m79vr_claeparHhoRouVgHOI=@proton.me/
Fixes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1714
Signed-off-by: Tj <tj.iam.tj@proton.me>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Enrico Weigelt, metux IT consult <info@metux.net>
(cherry picked from commit
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| .. | ||
| common | ||
| ddc | ||
| dixmods | ||
| doc | ||
| dri | ||
| dri2 | ||
| drivers | ||
| exa | ||
| fbdevhw | ||
| glamor_egl | ||
| i2c | ||
| int10 | ||
| loader | ||
| man | ||
| modes | ||
| os-support | ||
| parser | ||
| ramdac | ||
| shadowfb | ||
| utils | ||
| vgahw | ||
| x86emu | ||
| xkb | ||
| .gitignore | ||
| Makefile.am | ||
| meson.build | ||
| sdksyms.sh | ||
| xorg-wrapper.c | ||
| Xorg.sh.in | ||
| xorgconf.cpp | ||