In the investigation of the issue, its been noticed that the following lines are always found in the log files UM3 printers that are affected by the shifted / split screen:
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel:
Modules linked in: nls_iso8859_1 nls_cp437 vfat fat lm75 af_packet arc4 gpio_pca953x ath9k_htc uvcvideo ath9k_common videobuf2_vmalloc leds_pca963x videobuf2_memops ath9k_hw videobuf2_v4l2 ath videobuf2_core uas mac80211 videodev evdev media cfg80211 rc_cec sun4i_backend sun4i_ts axp20x_usb_power gpio_axp209 axp20x_pek axp20x_adc industrialio at24 sun4i_gpadc nvmem_sunxi_sid sun4i_lradc_keys sunxi_wdt pwm_sun4i ahci_sunxi libahci_platform libahci libata sun4i_ss sun4i_drm_hdmi cec des_generic sun4i_hdmi_i2c rc_core spi_sun4i sun4i_tcon sun4i_drm drm_kms_helper cfbfillrect cfbimgblt cfbcopyarea rotary_encoder drm pwm_beeper cpufreq_dt thermal_sys hwmon i2c_dev rfkill_gpio rfkill sha1_arm_neon sha1_arm sha1_generic ipv6 ssd1307fb syscopyarea sysfillrect sysimgblt fb_sys_fops [last unloaded: gpio_pca953x]
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: CPU: 0 PID: 7 Comm: ksoftirqd/0 Tainted: G W 4.14.32-ultimaker-00309-geaace6d4aede #3
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: Hardware name: Allwinner sun7i (A20) Family
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b01102bc>] (unwind_backtrace) from [<b010c17c>] (show_stack+0x10/0x14)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b010c17c>] (show_stack) from [<b05e54bc>] (dump_stack+0x84/0x98)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b05e54bc>] (dump_stack) from [<b012beb0>] (__warn+0xe8/0x100)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b012beb0>] (__warn) from [<b012bf30>] (warn_slowpath_null+0x20/0x28)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b012bf30>] (warn_slowpath_null) from [<af43cc88>] (ieee80211_rx_napi+0x848/0x9ac [mac80211])
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<af43cc88>] (ieee80211_rx_napi [mac80211]) from [<af574370>] (ath9k_rx_tasklet+0x13c/0x17c [ath9k_htc])
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<af574370>] (ath9k_rx_tasklet [ath9k_htc]) from [<b0130ca8>] (tasklet_action+0x74/0x110)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b0130ca8>] (tasklet_action) from [<b0101644>] (__do_softirq+0xfc/0x224)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b0101644>] (__do_softirq) from [<b0130dd4>] (run_ksoftirqd+0x38/0x50)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b0130dd4>] (run_ksoftirqd) from [<b014c468>] (smpboot_thread_fn+0x11c/0x198)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b014c468>] (smpboot_thread_fn) from [<b01487d0>] (kthread+0x124/0x154)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: [<b01487d0>] (kthread) from [<b0108208>] (ret_from_fork+0x14/0x2c)
Jun 12 19:44:59 ultimakersystem-ccbdd300169b kernel: ---[ end trace a088063bd8ec7c9d ]---
Jun 12 19:44:59 ultimakersystem-ccbdd300169b connmand[259]: wlan0 {newlink} index 3 address 00:0E:8E:72:24:A1 mtu 1500
Jun 12 19:44:59 ultimakersystem-ccbdd300169b connmand[259]: wlan0 {newlink} index 3 operstate 2 <DOWN>
Maybe someone in the community understands a bit more whats happening there?
All evidence we have supports the fact that a local network configuration setting is causing a corruption in the data. Because of htat,tTogether with the logs, any and all information about your local network configuration may be helpful in the investigation of this issue:
- is it home or work network
- any peculiarities that stand out for your network? Many devices connected?
- Are you using a wifi repeater?
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ahoeben 1,981
I realize you probably want this issue fixed instead of a workaround, but if Wifi seems to be the cause of the problem and you can't run wires, then you might try using a simple access point to do the wifi-ing and connect a short ethernet cable between the access point and the printer.
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