kmail hangs or causes desktop to hang when used with Nouveau graphics driver

Submitted by Nick

Assigned to Nouveau Project

Link to original bug (#101676)

Description

Created attachment 132409 syslog output when kmail causes kmail/desktop to hang

System Config, KDE Neon LTS 5.8.7, Nouveau driver 1:1.0.12-2 as described by Ubuntu 16.04.1 LTS. Nvidia GeForce GTX570M, kmail 5.5.2.

Kmail will become unresponsive when attempting to scroll or click left on an email. Sometimes just the controls/buttons in kmail will be unreponsive but sometimes the whole desktop will become unreponsive and freeze, requiring a ALT-SYSRq RSEIUB command to reboot system, ALT-F1 not working. If instead I use the Nvidia 375 driver the problem disappears, so this problem seems to be related to the use of the Nouveau driver. syslog reports the following errors..

Jul 2 23:02:30 nick-X681X kernel: [12787.488155] nouveau 0000:01:00.0: kmail[8229]: Unknown handle 0x0000002c Jul 2 23:02:30 nick-X681X kernel: [12787.488159] nouveau 0000:01:00.0: kmail[8229]: validate_init Jul 2 23:02:30 nick-X681X kernel: [12787.488161] nouveau 0000:01:00.0: kmail[8229]: validate: -2 Jul 2 23:02:33 nick-X681X kernel: [12790.327435] nouveau 0000:01:00.0: gr: TRAP ch 17 [005f1f4000 kmail[8229]] Jul 2 23:02:33 nick-X681X kernel: [12790.327448] nouveau 0000:01:00.0: gr: GPC0/TPC0/TEX: 80000041 Jul 2 23:02:33 nick-X681X kernel: [12790.327456] nouveau 0000:01:00.0: gr: GPC0/TPC1/TEX: 80000041 Jul 2 23:02:33 nick-X681X kernel: [12790.327464] nouveau 0000:01:00.0: gr: GPC0/TPC2/TEX: 80000041 Jul 2 23:02:33 nick-X681X kernel: [12790.327472] nouveau 0000:01:00.0: gr: GPC0/TPC3/TEX: 80000041 Jul 2 23:02:33 nick-X681X kernel: [12790.327481] nouveau 0000:01:00.0: gr: GPC1/TPC0/TEX: 80000041 Jul 2 23:02:33 nick-X681X kernel: [12790.327489] nouveau 0000:01:00.0: gr: GPC1/TPC1/TEX: 80000041 Jul 2 23:02:33 nick-X681X kernel: [12790.327498] nouveau 0000:01:00.0: gr: GPC1/TPC2/TEX: 80000041 Jul 2 23:02:33 nick-X681X kernel: [12790.327513] nouveau 0000:01:00.0: fifo: read fault at 0002a0a000 engine 00 [PGRAPH] client 01 [GPC1/TEX] reason 02 [PAGE_NOT_PRESENT] on channel 17 [005f1f4000 kmail[8229]] Jul 2 23:02:33 nick-X681X kernel: [12790.327516] nouveau 0000:01:00.0: fifo: gr engine fault on channel 17, recovering... Jul 2 23:03:33 nick-X681X kernel: [12850.755747] nouveau 0000:01:00.0: kmail[8229]: failed to idle channel 17 [kmail[8229]] Jul 2 23:03:48 nick-X681X kernel: [12865.757800] nouveau 0000:01:00.0: kmail[8229]: failed to idle channel 17 [kmail[8229]]

It also generates a second different error on some occasions ie a FIFO read fault at 0001afa00 engine 00 [PGRAPH] client 01 [GPC1/TEX] reason 02 [Page not present] on channel 5.

This error tends to hang the entire desktop, hence why I have attached a photo of the tail -f /var/log/syslog output.

Attachment 132409, "syslog output when kmail causes kmail/desktop to hang":