14:22 < berniyh> hi, plasmashell (5.7.4) is stuck after unlocking the screen                                                                                                                                                                                          
14:22 < berniyh> didn't yet restart it                                                                                                                                                                                                                               
14:22 < berniyh> is there a way to find out where it's stuck?                                                                                                                                                                                                        
14:22 < berniyh> and is there a point?                                                                                                                                                                                                                               
14:22 < mgraesslin> gdb                                                                                                                                                                                                                                              
14:25 < berniyh> gdb --pid something?                                                                                                                                                                                                                                
14:25 < berniyh> and then what?                                                                                                                                                                                                                                      
14:26 < mgraesslin> yes gdb --pid <pid of plasmashell>                                                                                                                                                                                                               
14:26 < mgraesslin> then t a a bt                                                                                                                                                                                                                                    
14:27 < berniyh> https://bpaste.net/show/3704245d4600                                                                                                                                                                                                                
14:27 < berniyh> oh, forgot about the threads                                                                                                                                                                                                                        
14:27 < mgraesslin> I think that's already the correct one                                                                                                                                                                                                           
14:28 < berniyh> https://bpaste.net/show/484078dc935a                                                                                                                                                                                                                
14:28 < mgraesslin> yeah, that erm looks bad                                                                                                                                                                                                                         
14:29 < mgraesslin> it's a freeze in the radeonsi driver                                                                                                                                                                                                             
14:29 < mgraesslin> though I don't understand why                                                                                                                                                                                                                    
14:29 < mgraesslin> what looks really bad is that thread 1 and thread 2 are both blocked in xcb_conn_wait                                                                                                                                                            
14:29 < mgraesslin> no surprise it freezes                                                                                                                                                                                                                           
14:29 < mgraesslin> really bad                                                                                                                                                                                                                                       
14:29 < berniyh> maybe it's related to the freezing bug I'm experiencing from time to time (wrote you an email about that)?                                                                                                                                          
14:30 < berniyh> but in that case the whole screen freezes, while here only plasmashell is affected                                                                                                                                                                  
14:30 < mgraesslin> quite possible it's related                                                                                                                                                                                                                      
14:30 < mgraesslin> in compositing the same could happen, if we go into an xcb_conn_wait in thread 1 it will freeze                                                                                                                                                  
14:30 < berniyh> [88765.431890] [drm:amdgpu_crtc_page_flip] *ERROR* failed to reserve new rbo buffer before flip                                                                                                                                                     
14:31 < berniyh> seems like there is something going on                                                                                                                                                                                                              
14:31 < mgraesslin> yep that is probably related                                                                                                                                                                                                                     
14:31 < mgraesslin> my guess from the method names is that this is failing to allocate a back buffer                                                                                                                                                                 
14:31 < mgraesslin> which would match the error message                                                                                                                                                                                                              
14:32 < mgraesslin> that backtrace might be quite useful for the radeon devs, even without the debug symbols                                                                                                                                                         
14:32 < berniyh> I'll attach the bt and the log from the conversation to the bug I reported                                                                                                                                                                          
14:33 < mgraesslin> ok                                                                                                                                                                                                                                               
14:33 < berniyh> if I suspend and activate compositing, the task bar starts flickering                                                                                                                                                                               
14:34 < mgraesslin> probably kwin gets a bad pixmap                                                                                                                                                                                                                  
14:34 < mgraesslin> which would given the freeze also not be too surprising                                                                                                                                                                                          
14:34 < berniyh> k