[Bug 99311] [regression, radeonsi] Updating to 1edc53a66b breaks SDDM (white screen on launch)
https://bugs.freedesktop.org/show_bug.cgi?id=99311
Bug ID: 99311 Summary: [regression,radeonsi] Updating to 1edc53a66b breaks SDDM (white screen on launch) Product: Mesa Version: git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Keywords: regression Severity: major Priority: medium Component: Drivers/Gallium/radeonsi Assignee: dri-devel@lists.freedesktop.org Reporter: kai@dev.carbon-project.org QA Contact: dri-devel@lists.freedesktop.org
Somewhere between c93efb0a4f and 1edc53a66b a regression was introduced, causing SDDM launching into a pure white screen instead of the login screen. There's nothing logged to either /var/log/Xorg.0.log or /var/log/sddm.log and dmesg is also clear. Downgrading to c93efb0a4f lets me login again.
I have not bisected yet, but maybe this information is already enough to find the cause. For the full stack affected by this regression, please see below.
GPU: Hawaii PRO [Radeon R9 290] (ChipID = 0x67b1) Mesa: Git:master/1edc53a66b + the modified version of attachment 127812 libdrm: 2.4.74-1 LLVM: SVN:trunk/r291276 (4.0 devel) + https://reviews.llvm.org/D26348?download=true X.Org: 2:1.19.0-3 Linux: 4.9.1 Firmware: 20161130-2 libclc: Git:master/b906699f68 DDX (amdgpu): 1.2.0-1+b1
Let me know, if you need anything else (besides a bisect).
https://bugs.freedesktop.org/show_bug.cgi?id=99311
Kai kai@dev.carbon-project.org changed:
What |Removed |Added ---------------------------------------------------------------------------- Component|Drivers/Gallium/radeonsi |Mesa core CC| |kenneth@whitecape.org Summary|[regression,radeonsi] |[regression,bisected,core] |Updating to 1edc53a66b |Updating to 1edc53a66b |breaks SDDM (white screen |breaks SDDM (white screen |on launch) |on launch) Keywords| |bisected QA Contact|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop. |.org |org Assignee|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop. |.org |org
--- Comment #1 from Kai kai@dev.carbon-project.org --- Ok, I finished the bisection: 8b5749f65ac434961308ccb579fb8a816e4f29d5 is the first bad commit commit 8b5749f65ac434961308ccb579fb8a816e4f29d5 Author: Kenneth Graunke kenneth@whitecape.org Date: Sun Nov 15 04:37:50 2015 -0800
glsl: Override the # of varying slots for ClipDistance and TessLevel*.
Right now, this shouldn't have any effect, as all drivers use LowerClipDist and LowerTessFactors to turn the float[] arrays into vectors.
However, it should help make it possible for drivers to avoid that lowering.
Signed-off-by: Kenneth Graunke kenneth@whitecape.org Reviewed-by: Jason Ekstrand jason@jlekstrand.net Reviewed-by: Timothy Arceri timothy.arceri@collabora.com
:040000 040000 1b29c9a54c33c8809e38f8fd99ea7dbb1935107e 5900d84fdc8d64a53dae3b7c4ac01be73b31c614 M src
The bisection log is: # bad: [1edc53a66b33e4d17688a3d03b1bdffed2aec414] glsl: fix opt_minmax redundancy checks against baserange # good: [c93efb0a4fd7dba8390e066605fe5f4c3e26e767] swr: [rasterizer core] rename OutputMerger functions git bisect start '1edc53a66b' 'c93efb0a4f' # good: [6e7ce1ef55b138ed2cdedb40cbc010b523de8743] gallivm: generalize 4x4f->1x16ub special case conversion git bisect good 6e7ce1ef55b138ed2cdedb40cbc010b523de8743 # bad: [e6ae19944d977dc91bc45adff679337182c20683] i965: Rework gl_TessLevel*[] handling to use NIR compact arrays. git bisect bad e6ae19944d977dc91bc45adff679337182c20683 # bad: [5c580e64cc206ab160e1767c42e4d6c81f67da4d] glsl: Mark whole variable used for ClipDistance and TessLevel*. git bisect bad 5c580e64cc206ab160e1767c42e4d6c81f67da4d # good: [aead6a1e947af84b0af2853c204d5cad6d92bfff] gallium/radeon: use the internal clear_buffer callback to fix r600g git bisect good aead6a1e947af84b0af2853c204d5cad6d92bfff # bad: [8b5749f65ac434961308ccb579fb8a816e4f29d5] glsl: Override the # of varying slots for ClipDistance and TessLevel*. git bisect bad 8b5749f65ac434961308ccb579fb8a816e4f29d5 # good: [6aa5cb34d03765b7be8611aa516bc201bd337f73] glsl: Create and use a new ir_variable::count_attribute_slots() wrapper. git bisect good 6aa5cb34d03765b7be8611aa516bc201bd337f73 # first bad commit: [8b5749f65ac434961308ccb579fb8a816e4f29d5] glsl: Override the # of varying slots for ClipDistance and TessLevel*.
I verified this is really the first bad commit by building 1edc53a66b with 8b5749f65a reverted and that gave me a working SDDM again.
dri-devel@lists.freedesktop.org
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