Created attachment 137016 [details] kmail backtrace testing mesa 18.0-rc2, Radeon HD6950 many KDE applications crash with the following in the backtrace. I have seen this with ksplashqml, kmail, krunner and possibly plasma (but for some reason symbols there get truncated). Relevant (r600g) part of backtrace Thread 1 (Thread 0x7f303aec5640 (LWP 4710)): [KCrash Handler] #6 0x00007f306fc84000 in __memcpy_ssse3 () from /lib64/libc.so.6 #7 0x00007f30338255b4 in tgsi_dup_tokens () from /usr/lib64/dri/r600_dri.so #8 0x00007f303395fa9b in r600_create_shader_state_tokens () from /usr/lib64/dri/r600_dri.so #9 0x00007f303395fad3 in r600_create_shader_state () from /usr/lib64/dri/r600_dri.so #10 0x00007f3033674ecd in st_create_fp_variant () from /usr/lib64/dri/r600_dri.so #11 0x00007f3033676e56 in st_get_fp_variant () from /usr/lib64/dri/r600_dri.so #12 0x00007f303362d070 in st_update_fp () from /usr/lib64/dri/r600_dri.so #13 0x00007f303362968e in st_validate_state () from /usr/lib64/dri/r600_dri.so #14 0x00007f3033647306 in st_draw_vbo () from /usr/lib64/dri/r600_dri.so #15 0x00007f303360a108 in vbo_validated_drawrangeelements () from /usr/lib64/dri/r600_dri.so #16 0x00007f303360a89f in vbo_exec_DrawElements () from /usr/lib64/dri/r600_dri.so #17 0x00007f3062207551 in QSGBatchRenderer::Renderer::renderMergedBatch(QSGBatchRenderer::Batch const*) () from /usr/lib64/libQt5Quick.so.5 #18 0x00007f3062208935 in QSGBatchRenderer::Renderer::renderBatches() () from /usr/lib64/libQt5Quick.so.5
I think this might be a duplicate of Bug 104762, which is fixed in master Can you check to see if it's fixed in Mesa git? If so I think you'll see the fix in rc3
Will check. At earliest tomorrow evening though...
Just booted with 18.0-rc3. Plasma started up just fine. Alt+tab in kwin however... Different bug? #6 0x00007f5b039615bd in r600_draw_vbo () from /usr/lib64/dri/r600_dri.so #7 0x00007f5b03869ba4 in u_vbuf_draw_vbo () from /usr/lib64/dri/r600_dri.so #8 0x00007f5b03647457 in st_draw_vbo () from /usr/lib64/dri/r600_dri.so #9 0x00007f5b0360a108 in vbo_validated_drawrangeelements () from /usr/lib64/dri/r600_dri.so #10 0x00007f5b0360a89f in vbo_exec_DrawElements () from /usr/lib64/dri/r600_dri.so #11 0x00007f5b2ab96551 in QSGBatchRenderer::Renderer::renderMergedBatch(QSGBatchRenderer::Batch const*) () from /usr/lib64/libQt5Quick.so.5
Created attachment 137095 [details] kwin backtrace
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