Created attachment 1377773 [details] Patch series from email thread When launching nautilus from the "Location" menu (when that add-on is enabled) the cursor will spin while it's busy loading. If done multiple times quickly in succession then it will cause the xserver to hang. My best guess is that when it tries to animate the cursor and it's already animated it freezes. Here is the backtrace snippet when it's deadlocked: (gdb) bt #0 0x00007f9bfc116877 in ioctl () from /lib64/libc.so.6 #1 0x00007f9bf691b7d1 in ?? () from /usr/lib64/xorg/modules/drivers/nvidia_drv.so #2 0x00007f9bf691710a in ?? () from /usr/lib64/xorg/modules/drivers/nvidia_drv.so #3 0x00007f9bf6919e79 in ?? () from /usr/lib64/xorg/modules/drivers/nvidia_drv.so #4 0x00007f9bf68ad26b in ?? () from /usr/lib64/xorg/modules/drivers/nvidia_drv.so #5 0x00007f9bf6e2ab44 in ?? () from /usr/lib64/xorg/modules/drivers/nvidia_drv.so #6 0x00000000020e9660 in ?? () #7 0x00000000020f9278 in ?? () #8 0x00000000028bb720 in ?? () #9 0x00000020f6919e85 in ?? () #10 0x0000000000000080 in ?? () #11 0x000000000219f650 in ?? () #12 0x0000000000000553 in ?? () #13 0x000000000000049d in ?? () #14 0x000000000219b4c0 in ?? () #15 0x00000000020d85a0 in ?? () #16 0x00000000027219d0 in ?? () #17 0x00000000004ba187 in xf86ScreenSetCursor () #18 0x00000000004ba484 in xf86SetCursor () #19 0x00000000004b8ec0 in xf86CursorSetCursor () #20 0x000000000058580a in miPointerUpdateSprite () #21 0x0000000000585a5a in miPointerDisplayCursor () #22 0x00000000004c73f0 in CursorDisplayCursor () #23 0x0000000000516c06 in AnimCurTimerNotify () ... The environment here is the NVIDIA 387.34 driver with an NVIDIA Titan V and xorg-x11-server-Xorg-1.19.5-1.fc27.x86_64. When I previously had a GeForce 1070 in the system this problem never occured. It was suggested by NVIDIA that this email thread might be related. https://lists.x.org/archives/xorg-devel/2017-November/055144.html So, I applied the patch series (along with the free() fix that was recommended) and rebuilt xorg-x11-server using mock starting with the xorg-x11-server-1.19.6-1.fc27.src.rpm package from koji and the attached patch. Then it just kills the server when the cursor might be animating. If I SSH to the machine when it's hung and run the following suggested command I can unfreeze the desktop: pkill -STOP Xorg; sleep 1; pkill -CONT Xorg See the NVIDIA thread below for more information from another user which is experiencing the same problem, but with Ubuntu 16.04. https://devtalk.nvidia.com/default/topic/1028172/linux/titan-v-ubuntu-16-04lts-and-387-34-driver-crashes-badly It's possible this might be an NVIDIA driver issue, but I believe it's an xserver issue.
It appears to me that the xserver hangs upon completion of the full animation cycle for an animated cursor. Something must happen when the cycle is ending or when the next animation cycle beins that cause this hang. A few more details were put on the NVIDIA page.
Your animcur patches to the xserver git has fixed this xserver freeze then applied to the latest 1.19.6 package. I suppose since this is not wide spread I'll have to wait until 1.19.7 to get this fixed in the normal Fedora package.
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