16150 2026-01-26 15:10:15 +0000 AB-INT: oe-selftest-armhost: Failed to start QEMU (hangs with drm) 2026-07-22 15:08:55 +0000 1 1 10 QA/Testing Runtime Testing oeqa/runtime unspecified ARM Multiple NEW AB-INT Medium normal 6.1 1 mathieu.dubois-briand unassigned kexin.hao randy.macleod richard.purdie ross.burton yoann.congal --- --- No (bug/feature does not impact docs) oldest_to_newest 104071 0 mathieu.dubois-briand 2026-01-26 15:10:15 +0000 We got this failure on master: RuntimeError: core-image-minimal - FAILED to start qemu - check the task log and the boot log ... WARNING: Target didn't reach login banner in 1000 seconds (01/26/26 01:56:02) WARNING: Last 25 lines of login console (17587): [ 0.770309] pci 0000:00:01.0: BAR 1 [mem 0x10040000-0x10040fff]: assigned [ 0.770336] pci 0000:00:02.0: BAR 1 [mem 0x10041000-0x10041fff]: assigned [ 0.770355] pci 0000:00:03.0: BAR 1 [mem 0x10042000-0x10042fff]: assigned [ 0.770367] pci 0000:00:05.0: BAR 1 [mem 0x10043000-0x10043fff]: assigned [ 0.770379] pci 0000:00:06.0: BAR 1 [mem 0x10044000-0x10044fff]: assigned [ 0.770397] pci 0000:00:03.0: BAR 0 [io 0x1000-0x107f]: assigned [ 0.770412] pci 0000:00:05.0: BAR 0 [io 0x1080-0x10bf]: assigned [ 0.770430] pci 0000:00:01.0: BAR 0 [io 0x10c0-0x10df]: assigned [ 0.770440] pci 0000:00:02.0: BAR 0 [io 0x10e0-0x10ff]: assigned [ 0.770453] pci_bus 0000:00: resource 4 [io 0x0000-0xffff] [ 0.770456] pci_bus 0000:00: resource 5 [mem 0x10000000-0x3efeffff] [ 0.770457] pci_bus 0000:00: resource 6 [mem 0x8000000000-0xffffffffff] [ 0.770488] pci 0000:00:04.0: enabling device (0000 -> 0002) [ 0.772410] virtio-pci 0000:00:01.0: enabling device (0000 -> 0003) [ 0.775087] virtio-pci 0000:00:02.0: enabling device (0000 -> 0003) [ 0.777370] virtio-pci 0000:00:03.0: enabling device (0000 -> 0003) [ 0.779704] virtio-pci 0000:00:05.0: enabling device (0000 -> 0003) [ 0.784075] virtio-pci 0000:00:06.0: enabling device (0000 -> 0002) [ 0.826674] [drm] pci: virtio-gpu-pci detected at 0000:00:06.0 [ 0.827030] [drm] features: -virgl +edid -resource_blob -host_visible [ 0.827033] [drm] features: -context_init [ 0.828017] [drm] number of scanouts: 1 [ 0.828023] [drm] number of cap sets: 0 [ 0.844502] [drm] Initialized virtio_gpu 0.1.0 for 0000:00:06.0 on minor 0 [ 0.881866] Console: switching to colour frame buffer device 160x50 Note, we had a similar error a few months ago, that was linked with qemu upgrade: https://bugzilla.yoctoproject.org/show_bug.cgi?id=16001 104073 1 mathieu.dubois-briand 2026-01-26 15:28:58 +0000 oe-selftest-armhost ubuntu2504-vk-arm1 master completed at 2026-01-26 02:48:56+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/23/builds/3221/steps/15/logs/stdio 104098 2 randy.macleod 2026-01-29 15:37:42 +0000 Richard checked the logs after this occurred but didn't find anything useful. 104444 3 mathieu.dubois-briand 2026-02-27 11:05:33 +0000 qemuarm64-ptest ubuntu2204-vk-arm2 master completed at 2026-02-27 10:42:08+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/61/builds/3131/steps/13/logs/stdio 104445 4 richard.purdie 2026-02-27 11:07:07 +0000 Logs from that build: https://valkyrie.yocto.io/pub/shared-failure-data/qemu_boot_log.20260227100156.2 https://valkyrie.yocto.io/pub/shared-failure-data/log.do_testimage.816104 Nothing 'interesting' I could find. 104446 5 richard.purdie 2026-02-27 11:09:21 +0000 One note is that there is no corresponding qemu_boot_log.20260227100156 That serial port seems to only have data after console init. https://valkyrie.yocto.io/pub/shared-failure-data/16150-success/ contains output from a successful ptest run from the same build for comparison 104447 6 richard.purdie 2026-02-27 11:12:07 +0000 Interestingly, one log has "printk: legacy console [hvc0] enabled", the other does not 104456 7 richard.purdie 2026-02-27 12:51:20 +0000 Since I was curious, I tried this: Index: printk/printk.c =================================================================== --- a/kernel/printk.orig/printk.c +++ b/kernel/printk/printk.c @@ -3979,6 +3979,9 @@ void register_console(struct console *ne u64 init_seq; int err; + if (strcmp(newcon->name, "hvc") == 0) + mdelay(500); + console_list_lock(); for_each_console(con) { which did change the logs to look like: [ 0.691950] virtio-pci 0000:00:05.0: enabling device (0000 -> 0003) [ 0.693791] virtio-pci 0000:00:06.0: enabling device (0000 -> 0002) [ 0.762657] [drm] pci: virtio-gpu-pci detected at 0000:00:06.0 [ 0.763553] [drm] features: -virgl +edid -resource_blob -host_visible [ 0.763557] [drm] features: -context_init [ 0.766006] [drm] number of scanouts: 1 [ 0.766028] [drm] number of cap sets: 0 [ 1.261454] printk: legacy console [hvc0] enabled [ 1.261948] [drm] Initialized virtio_gpu 0.1.0 for 0000:00:06.0 on minor 0 [ 1.268542] Console: switching to colour frame buffer device 160x50 [ 1.273368] virtio-pci 0000:00:06.0: [drm] fb0: virtio_gpudrmfb frame buffer device [ 1.278279] brd: module loaded [ 1.278859] virtio_blk virtio2: 4/0/0 default/read/poll queues so I was able to delay the console line to after most of the drm lines but now the virtio_gpu line and not the console switching 104457 8 richard.purdie 2026-02-27 13:23:04 +0000 I was pointed at: https://www.kernel.org/doc/Documentation/admin-guide/serial-console.rst """ The behavior is more complicated when the same device type is defined more times. In this case, there are the following two rules: 1. The output will appear only on the first device of each defined type. 2. ``/dev/console`` will be associated with the first registered device. Where the registration order depends on how kernel initializes various subsystems. """ so is /dev/console sometimes going somewhere else? Would that explain the "hang"? 104458 9 richard.purdie 2026-02-27 17:35:11 +0000 To try and rule out ordering completely, I deferred the hvc console init by patching: Index: drivers/tty/hvc/hvc_console.c =================================================================== --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -243,7 +243,7 @@ static int __init hvc_console_init(void) register_console(&hvc_console); return 0; } -console_initcall(hvc_console_init); +late_initcall(hvc_console_init); /* callback when the kboject ref count reaches zero. */ static void hvc_port_destruct(struct tty_port *po This did move the printk line much later in the boot but didn't reproduce the "hang". It seems there is therefore something else going on here... 104769 10 mathieu.dubois-briand 2026-03-23 08:55:25 +0000 pkgman-non-rpm debian12-vk-7 master&master-next completed at 2026-03-19 16:10:23+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/67/builds/3445/steps/19/logs/stdio 104845 11 mathieu.dubois-briand 2026-03-27 09:53:49 +0000 qemuarm-tc debian12-vk-9 master-next completed at 2026-03-26 19:24:51+00:00 https://valkyrie.yocto.io/pub/non-release/20260326-108/testresults/qemuarm-tc/ https://autobuilder.yoctoproject.org/valkyrie/#/builders/42/builds/3415/steps/13/logs/stdio 104950 12 mathieu.dubois-briand 2026-04-03 08:14:24 +0000 qemuarm64-musl-ptest ubuntu2504-vk-arm1 master-next completed at 2026-04-02 11:01:54+00:00 https://valkyrie.yocto.io/pub/non-release/20260402-63/testresults/qemuarm64-musl-ptest/ https://autobuilder.yoctoproject.org/valkyrie/#/builders/109/builds/204/steps/13/logs/stdio 104964 13 mathieu.dubois-briand 2026-04-07 08:45:36 +0000 qemuarm-alt ubuntu2510-vk-1 master-next completed at 2026-04-04 00:04:53+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/74/builds/3496/steps/15/logs/stdio 105076 14 mathieu.dubois-briand 2026-04-15 13:29:07 +0000 oe-selftest-armhost ubuntu2404-vk-arm1 mathieu/master-next completed at 2026-04-14 19:33:19+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/23/builds/3762/steps/15/logs/stdio 105081 15 randy.macleod 2026-04-15 15:24:04 +0000 A BSP-ish issue, CCing Kexin from our BSP team who -may be able- to find time to work on this. 105121 16 yoann.congal 2026-04-17 08:13:41 +0000 qemuarm64-ptest ubuntu2404-vk-arm1 whinlatter completed at 2026-04-17 02:24:36+00:00 https://autobuilder.yoctoproject.org/valkyrie/?#/builders/61/builds/3503 105251 17 mathieu.dubois-briand 2026-04-24 06:54:17 +0000 qemuarm64-ptest ubuntu2404-vk-arm1 master completed at 2026-04-24 02:07:47+00:00 https://valkyrie.yocto.io/pub/non-release/20260424-8/testresults/qemuarm64-ptest/ https://autobuilder.yoctoproject.org/valkyrie/#/builders/61/builds/3554/steps/13/logs/stdio 105355 18 mathieu.dubois-briand 2026-05-05 07:59:46 +0000 qemuarm-alt debian12-vk-9 mathieu/master-next completed at 2026-05-05 07:23:33+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/74/builds/3677/steps/14/logs/stdio 105575 19 mathieu.dubois-briand 2026-05-26 08:56:10 +0000 oe-selftest-armhost ubuntu2404-vk-arm1 master&master-next completed at 2026-05-19 07:15:33+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/23/builds/3968/steps/15/logs/stdio 105615 20 randy.macleod 2026-05-28 13:16:30 +0000 Bulk move of 6.0 Medium bugs to 6.1. 105748 21 mathieu.dubois-briand 2026-06-05 08:15:30 +0000 qemuarm64-musl-ptest ubuntu2404-vk-arm2 master&master-next completed at 2026-06-04 00:51:57+00:00 https://valkyrie.yocto.io/pub/non-release/20260603-116/testresults/qemuarm64-musl-ptest/ https://autobuilder.yoctoproject.org/valkyrie/#/builders/109/builds/494/steps/13/logs/stdio 106002 22 mathieu.dubois-briand 2026-06-25 10:23:41 +0000 qemuarm debian12-vk-7 mathieu/master-next completed at 2026-06-24 08:54:32+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/16/builds/4026/steps/14/logs/stdio 106033 23 mathieu.dubois-briand 2026-06-29 08:29:58 +0000 oe-selftest-armhost ubuntu2404-vk-arm1 master&mathieu/master-next completed at 2026-06-26 12:15:05+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/23/builds/4208/steps/15/logs/stdio 106066 24 mathieu.dubois-briand 2026-07-01 16:18:22 +0000 qemuarm-oecore debian11-vk-3 master completed at 2026-06-30 11:54:53+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/40/builds/4015/steps/13/logs/stdio 106148 25 mathieu.dubois-briand 2026-07-09 15:39:17 +0000 oe-selftest-armhost ubuntu2404-vk-arm2 mathieu/master-next completed at 2026-07-08 19:41:22+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/23/builds/4306/steps/15/logs/stdio 106268 26 mathieu.dubois-briand 2026-07-22 15:08:55 +0000 qemuarm64-ptest ubuntu2404-vk-arm1 master-next completed at 2026-07-21 17:23:03+00:00 https://valkyrie.yocto.io/pub/non-release/20260721-84/testresults/qemuarm64-ptest/ https://autobuilder.yoctoproject.org/valkyrie/#/builders/61/builds/4066/steps/13/logs/stdio