<html> <head> <meta http-equiv="content-type" content="text/html; charset=ISO-8859-1"> </head> <body text="#000000" bgcolor="#FFFFFF"> I am having a problem with suspend and resume. I suspect that this is a nouveau issue but I don't know this for sure. I have a Thinkpad W520 and it has both an NVidia card (lshw reports GF108GLM [Quadro 1000M]) and an Intel integrated graphics controller. I can switch modes in the bios and I do this on occasion because they have different advantages. I am running Xubuntu 13.10 and I use the nouveau drivers with the NVidia card. My problem only happens when I set the graphics card to use NVidia and this is why I suspect that this might be a nouveau problem. If I suspend the machine and resume it then at first glance, everything seems ok. My X session generally looks fine and most applications still work. However after the suspend and resume, three of my applications (quakespasm, mathematica and virtualbox) no longer work. Two of them (mathematica and virtualbox) cause X system to freeze and I am not even able to go to a different console window with C-Alt-F1. After some time X will shutdown and restart. After X restarts, I am fine again as long as I don't use the three programs. The problem with quake is a bit different. X is still frozen but I can go to a different console with C-Alt-F1 and kill quake from there. After killing quake X is unstuck and I can continue doing things. In the period while X is frozen and crashing there are some messages that show up in the syslog which say: <pre> nouveau E[Xorg[1680]] failed to idle channel 0xcccc0001 [Xorg[1680]]</pre> I can replicate this problem fairly consistently with mathematica and I have also replicated this on a fresh xubuntu install. I don't know enough about Linux to know what additional information to post. The last messages in the Xorg.0.log look like this: <blockquote> <pre>[ 1053.741] nouveau_exa_upload_to_screen:384 - falling back to memcpy ignores tiling [ 1068.740] nouveau_exa_download_from_screen:299 - falling back to memcpy ignores tiling [ 1068.740] (EE) [ 1068.740] (EE) Backtrace: [ 1068.740] (EE) 0: /usr/bin/X (xorg_backtrace+0x3d) [0x7ffe727fb02d] [ 1068.740] (EE) 1: /usr/bin/X (0x7ffe72659000+0x1a5d99) [0x7ffe727fed99] [ 1068.741] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7ffe71759000+0xfbb0) [0x7ffe71768bb0] [ 1068.741] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (0x7ffe70373000+0x14f559) [0x7ffe704c2559] [ 1068.741] (EE) 4: /usr/lib/xorg/modules/libexa.so (0x7ffe6b696000+0x53d6) [0x7ffe6b69b3d6] [ 1068.741] (EE) 5: /usr/lib/xorg/modules/libexa.so (0x7ffe6b696000+0x5893) [0x7ffe6b69b893] [ 1068.741] (EE) 6: /usr/lib/xorg/modules/libexa.so (0x7ffe6b696000+0x7f12) [0x7ffe6b69df12] [ 1068.741] (EE) 7: /usr/lib/xorg/modules/libexa.so (0x7ffe6b696000+0x10222) [0x7ffe6b6a6222] [ 1068.741] (EE) 8: /usr/lib/xorg/modules/libexa.so (0x7ffe6b696000+0x8599) [0x7ffe6b69e599] [ 1068.741] (EE) 9: /usr/bin/X (0x7ffe72659000+0x51f59) [0x7ffe726aaf59] [ 1068.741] (EE) 10: /usr/bin/X (0x7ffe72659000+0x5500e) [0x7ffe726ae00e] [ 1068.741] (EE) 11: /usr/bin/X (0x7ffe72659000+0x4456a) [0x7ffe7269d56a] [ 1068.741] (EE) 12: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7ffe70394de5] [ 1068.742] (EE) 13: /usr/bin/X (0x7ffe72659000+0x448af) [0x7ffe7269d8af] [ 1068.742] (EE) [ 1068.742] (EE) Segmentation fault at address 0x1a8 [ 1068.742] (EE) Fatal server error: [ 1068.742] (EE) Caught signal 11 (Segmentation fault). Server aborting [ 1068.742] (EE) [ 1068.742] (EE) Please consult the The X.Org Foundation support at <a class="moz-txt-link-freetext" href="http://wiki.x.org">http://wiki.x.org</a> for help. [ 1068.742] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 1068.742] (EE) [ 1068.742] (II) AIGLX: Suspending AIGLX clients for VT switch [ 1068.742] (II) NOUVEAU(0): NVLeaveVT is called. [ 1068.782] (EE) Server terminated with error (1). Closing log file. </pre> </blockquote> Is there any advice you can give on this? Is this a known problem? Thanks much, -Timothy </body> </html>