Changing console renders my system unresponsive

Hi,

I'm having a pretty dramatic experience changing console, f.ex.

Ctrl+Alt+F4. My system becomes completely unresponsive. Even

Alt+SysRq+reisub is unable to persuade my system to perform a gentlemans

reboot. To recover I must do a hard reboot.

Bringing this up in #guix suggests it's not a common issue.

My setup is:

Libreboot X200

Docking station

External monitor connected to the docking station with DisplayPort.

XFCE

GuixSD (from git, last commit in my repo

c11933c920dd7b7cdf68e13e6b3718602129210a)

Using DisplayPort I sometimes get the attached output. Other times I get

a white underscore in the top left corner on a black background.

Now, if I change video output to Laptop monitor and unplug the

DisplayPort cable I can change consoles. (Only setting video output to

Laptop is not enough, the cable must go.)

If I use VGA instead, changing consoles seems to work fine. However

running command "dmesg" tells of a Call Trace that looks much like the

Call Trace I sometimes see when my system becomes unresponsive

(attached), though a bit shorter.

---This is dmesg after changing consoles with VGA:---

[18562.847011] WARNING: CPU: 0 PID: 358 at

drivers/gpu/drm/i915/intel_display.c:13094 intel_atomic_c

ommit_tail+0xec9/0x11b0 [i915]

[18562.847013] pipe state doesn't match!

[18562.847014] Modules linked in: appletalk ax25 ipx p8023 p8022 psnap

llc iTCO_wdt iTCO_vendor_supp

ort snd_hda_codec_conexant snd_hda_codec_generic arc4 coretemp kvm_intel

kvm irqbypass ath9k i915 ps

mouse drm_kms_helper ath9k_common serio_raw ath9k_hw ath mac80211

i2c_i801 uvcvideo drm i2c_smbus sn

d_hda_intel videobuf2_vmalloc videobuf2_memops snd_hda_codec

videobuf2_v4l2 joydev lpc_ich thinkpad_

acpi snd_hda_core i2c_algo_bit fb_sys_fops syscopyarea videobuf2_core

sysfillrect input_leds snd_hwd

ep cfg80211 sysimgblt videodev snd_pcm usbkbd media nvram usbmouse

snd_timer e1000e snd soundcore pt

p shpchp fjes video pps_core mac_hid virtio_console virtio_net

virtio_blk virtio_balloon virtio_pci

virtio virtio_ring isci libsas scsi_transport_sas pata_atiixp pata_acpi

nvme nvme_core wp512 serpent

_generic xts

[18562.847065] gf128mul dm_crypt hid_apple hid_generic usbhid hid uas

usb_storage ahci libahci [las

t unloaded: pcspkr]

[18562.847076] CPU: 0 PID: 358 Comm: X Tainted: G W I

4.8.2-gnu #1

[18562.847078] Hardware name: LENOVO 7458WLD/7458WLD, BIOS CBET4000 4.0

05/18/2015

[18562.847080] 0000000000000286 000000003943eb96 ffff995f6d297a70

ffffffffa53ede43

[18562.847084] ffff995f6d297ac0 0000000000000000 ffff995f6d297ab0

ffffffffa50831e1

[18562.847087] 00003326c089ec22 ffff995f6cd11800 ffff995f6d0d4000

ffff995f6cd10800

[18562.847090] Call Trace:

[18562.847097] [<ffffffffa53ede43>] dump_stack+0x63/0x90

[18562.847101] [<ffffffffa50831e1>] __warn+0xd1/0xf0

[18562.847103] [<ffffffffa508325f>] warn_slowpath_fmt+0x5f/0x80

[18562.847130] [<ffffffffc08ab7d9>]

intel_atomic_commit_tail+0xec9/0x11b0 [i915]

[18562.847133] [<ffffffffa50c7840>] ? wait_woken+0x80/0x80

[18562.847159] [<ffffffffc08abec7>] intel_atomic_commit+0x407/0x570

[i915]

[18562.847191] [<ffffffffc060f161>] ? drm_atomic_check_only+0x141/0x640

[drm]

[18562.847206] [<ffffffffc060fcf7>] ?

drm_atomic_set_crtc_for_connector+0x97/0x100 [drm]

[18562.847221] [<ffffffffc060f697>] drm_atomic_commit+0x37/0x60 [drm]

[18562.847234] [<ffffffffc07fbc22>]

drm_atomic_helper_set_config+0x82/0xc0 [drm_kms_helper]

[18562.847248] [<ffffffffc05fdfc5>]

drm_mode_set_config_internal+0x65/0x110 [drm]

[18562.847262] [<ffffffffc060279c>] drm_mode_setcrtc+0x1ec/0x580 [drm]

[18562.847274] [<ffffffffc05f5132>] drm_ioctl+0x202/0x510 [drm]

[18562.847288] [<ffffffffc06025b0>] ? drm_mode_setplane+0x1c0/0x1c0

[drm]

[18562.847292] [<ffffffffa522bb27>] ? __vfs_read+0x37/0x150

[18562.847295] [<ffffffffa5240cef>] do_vfs_ioctl+0x9f/0x5e0

[18562.847299] [<ffffffffa5091211>] ? __set_task_blocked+0x41/0xa0

[18562.847301] [<ffffffffa5093b66>] ? __set_current_blocked+0x36/0x60

[18562.847304] [<ffffffffa52412a9>] SyS_ioctl+0x79/0x90

[18562.847307] [<ffffffffa5847d36>] entry_SYSCALL_64_fastpath+0x1e/0xa8

[18562.847309] ---[ end trace f68728a0d3053b57 ]---

I have no idea if this is really a Guix issue or not, maybe it's

Linux-libre?

Let me know if I can be of any assistance.

--

Petter

#guix Petter

Petter <petter@mykolab.ch> skribis:

[...]

I definitely don’t experience that on my laptop (not an X200). Perhaps

the KMS module and Xorg driver is at fault? Which ones are in use?

(My laptop has an Intel graphics card, so i915.ko, though for some

reason Xorg uses xf86-video-intel instead of “modesetting”.)

Ludo’.

Did you try using an external monitor connected with DisplayPort?

KMS Module in use (from /var/log/Xorg.0.log):

[ 18.862] (II) intel(0): Using Kernel Mode Setting driver: i915,

version 1.6.0 20160711

As for Xorg driver in use, I'm not sure where or how to find this out.

Grepping /var/log/Xorg.0.log for LoadModule in case that's helpful. If

not, let me know how I can find it.

58:[ 18.637] (II) LoadModule: "glx"

70:[ 18.725] (II) LoadModule: "intel"

76:[ 18.747] (II) LoadModule: "modesetting"

82:[ 18.762] (II) LoadModule: "fbdev"

88:[ 18.771] (II) LoadModule: "vesa"

109:[ 18.864] (II) LoadModule: "fbdevhw"

145:[ 18.885] (II) LoadModule: "dri2"

148:[ 18.885] (II) LoadModule: "present"

190:[ 19.050] (II) LoadModule: "libinput"

--

Petter

On 2016-10-26 14:30, ludo@gnu.org wrote:

Petter <petter@mykolab.ch> skribis:

No, I only tried VGA and HDMI outputs, which work fine.

OK.

Could you check maybe whether other X200 users have that problem? It

doesn’t seem to be GuixSD-specific.

Did you have success with another distro on this laptop? If so, it

would be good to see the difference in terms of drivers and versions.

Ludo’.

tags 24789 moreinfo

Dear,

The bug #24789 [1] is a bit old.

What is the status? Do you still have this unexpected behaviour?

[1] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=24789

All the best,

simon

Dear,

Because this bug is more than 3 years old, tagged moreinfo and without

any answer by the submitter since 12 weeks, I am closing.

Best regards,

simon