Also add David and dri list.....
Short summary, suspend/resume breaks with virtio-gpu as there are no
that put the device back into working state.
On 03/13/2018 02:32 PM, Christian Borntraeger wrote:
> On 03/13/2018 01:41 PM, Christian Borntraeger wrote:
>> another thing with virtio-gpu.
>> I can successfully do suspend/resume (echo disk > /sys/power/state) on my
>> system. As soon as I have a
>> virtio-gpu the system hangs on reboot/shutdown:
>> crash> bt 1
>> PID: 1 TASK: 6bef0000 CPU: 4 COMMAND: "systemd"
>> #0 [6beef4c0] __schedule at a55d60
>> #1 [6beef530] schedule at a563f2
>> #2 [6beef548] virtio_gpu_queue_ctrl_buffer_locked at 7ea708
>> #3 [6beef650] virtio_gpu_queue_ctrl_buffer at 7ea830
>> #4 [6beef680] virtio_gpu_primary_plane_update at 7ed5ee
>> #5 [6beef710] drm_atomic_helper_commit_planes at 7a2b46
>> #6 [6beef760] vgdev_atomic_commit_tail at 7e9dbc
>> #7 [6beef790] commit_tail at 7a7126
>> #8 [6beef7c0] drm_atomic_helper_commit at 7a73fe
>> #9 [6beef800] restore_fbdev_mode_atomic at 7aa38a
>> #10 [6beef8a0] drm_fb_helper_pan_display at 7ab7aa
>> #11 [6beef8f0] fb_pan_display at 74a248
>> #12 [6beef928] bit_update_start at 7573c0
>> #13 [6beef958] fbcon_switch at 7542b4
>> #14 [6beefa50] redraw_screen at 77b2b8
>> #15 [6beefaa0] csi_J at 77b476
>> #16 [6beefad8] do_con_trol at 77ee12
>> #17 [6beefb40] do_con_write at 77f80c
>> #18 [6beefc10] con_write at 78003c
>> #19 [6beefc40] n_tty_write at 7662d4
>> #20 [6beefce0] tty_write at 761734
>> #21 [6beefd48] __vfs_write at 3483cc
>> #22 [6beefe00] vfs_write at 3486e8
>> #23 [6beefe60] sys_write at 3489de
>> #24 [6beefea8] system_call at a5b6a8
>> PSW: 0705100180000000 000003ff8111251c (user space)
>> GPRS: 0000000000000000 000003ff00000002 000000000000000e 000003ff80deaef0
>> 000000000000000a 0000000000000000 000000000000000f 00000000000003ef
>> 0000000000000000 000000000000000e 000003ff80deaef0 000000000000000a
>> 000003ff81228f58 000000000000000e 000003ff81112510 000003fffdefedf8
>> Turns out that the virtio-gpu console (via vnc) prints the image loading but
>> stops and show no login prompt. (but agetty is running on tty1) So I assume
>> already hangs after resume (and I am working on the serial sclp console).
>> Does suspend resume works for you with virtio-gpu on x86? If yes, then I
>> now look into the s390 code (virtio-blk and net seems to work fine).
>> it would be good if you could have a look.
> I just checked. It seems that virtio-gpu has no freeze/restore callbacks. Is
> some work planned to implement the power callbacks for virtio-gpu?
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