<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - 4K Display on Displayport goes black when pointer hits column 0" href="https://bugs.freedesktop.org/show_bug.cgi?id=94643#c3">Comment # 3</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - 4K Display on Displayport goes black when pointer hits column 0" href="https://bugs.freedesktop.org/show_bug.cgi?id=94643">bug 94643</a> from <a class="email" href="mailto:rmu@unfoo.net" title="Robert Schöftner <rmu@unfoo.net>"> Robert Schöftner</a> <pre>I just managed to hit this bug again, this time external display went gray, keyboard was dead, internal display was not "damaged" but did not update any more except for mouse pointer, that could be moved. syslog: Apr 4 14:06:24 boltzmann kernel: [346097.973285] nouveau 0000:01:00.0: Xorg[2270]: failed to idle channel 3 [Xorg[2270]] Apr 4 14:06:24 boltzmann kernel: [346097.973475] nouveau 0000:01:00.0: fb: trapped read at 002001e020 on channel 3 [0fb30000 Xorg[2270]] engine 0c [SEMAPHORE_BG] client 08 [PFIFO_READ] subclient 00 [] reason 00000002 [PAGE_NOT_PRESENT] Apr 4 14:06:24 boltzmann kernel: [346097.973505] nouveau 0000:01:00.0: gr: TRAP_DISPATCH (unknown 00000004) Apr 4 14:06:24 boltzmann kernel: [346097.973519] nouveau 0000:01:00.0: fb: trapped read at 0000000400 on channel 3 [0fb30000 Xorg[2270]] engine 00 [PGRAPH] client 03 [DISPATCH] subclient 00 [GRCTX] reason 0000000f [DMAOBJ_LIMIT] Apr 4 14:06:24 boltzmann kernel: [346097.973548] nouveau 0000:01:00.0: gr: TRAP_DISPATCH (unknown 00000008) Apr 4 14:06:24 boltzmann kernel: [346097.973591] nouveau 0000:01:00.0: fb: trapped read at 0000015400 on channel 3 [0fb30000 Xorg[2270]] engine 00 [PGRAPH] client 03 [DISPATCH] subclient 00 [GRCTX] reason 0000000f [DMAOBJ_LIMIT] Apr 4 14:06:24 boltzmann kernel: [346097.973619] nouveau 0000:01:00.0: gr: TRAP_DISPATCH (unknown 00000008) Apr 4 14:06:24 boltzmann kernel: [346097.973625] nouveau 0000:01:00.0: gr: 00200030 [ILLEGAL_MTHD ILLEGAL_CLASS] ch 3 [000fb30000 Xorg[2270]] subc 2 class 0000 mthd 0230 data 000000cf Apr 4 14:06:24 boltzmann kernel: [346097.973646] nouveau 0000:01:00.0: fb: trapped read at 0000045600 on channel 3 [0fb30000 Xorg[2270]] engine 00 [PGRAPH] client 03 [DISPATCH] subclient 00 [GRCTX] reason 0000000f [DMAOBJ_LIMIT] Apr 4 14:06:24 boltzmann kernel: [346097.973666] nouveau 0000:01:00.0: gr: 00000030 [ILLEGAL_MTHD ILLEGAL_CLASS] ch 3 [000fb30000 Xorg[2270]] subc 2 class 0000 mthd 0234 data 00000000 Apr 4 14:06:24 boltzmann kernel: [346097.973684] nouveau 0000:01:00.0: gr: 00000030 [ILLEGAL_MTHD ILLEGAL_CLASS] ch 3 [000fb30000 Xorg[2270]] subc 2 class 0000 mthd 0238 data 00000040 Apr 4 14:06:24 boltzmann kernel: [346097.973708] nouveau 0000:01:00.0: gr: 00000030 [ILLEGAL_MTHD ILLEGAL_CLASS] ch 3 [000fb30000 Xorg[2270]] subc 2 class 0000 mthd 023c data 00000001 Apr 4 14:06:24 boltzmann kernel: [346097.973734] nouveau 0000:01:00.0: gr: 00000030 [ILLEGAL_MTHD ILLEGAL_CLASS] ch 3 [000fb30000 Xorg[2270]] subc 2 class 0000 mthd 0240 data 00000000 Apr 4 14:06:24 boltzmann kernel: [346097.973759] nouveau 0000:01:00.0: gr: 00000030 [ILLEGAL_MTHD ILLEGAL_CLASS] ch 3 [000fb30000 Xorg[2270]] subc 2 class 0000 mthd 0248 data 00000915 [repeats like that with different mthd/data] I killed Xorg with -9 and could reboot cleanly (via ssh). Any hints how to debug this?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>