Looking for some suggestions for troubleshooting from here as I'm almost out of ideas.

 

-HP Desktop (h8-1409) (pegatron corporation 2ad5 version 1.03)
-Running latest firmware (granted, it's five years old)
-Quicksync CPU (https://ark.intel.com/content/www/us/en/ark/products/65719/intel-core-i7-3770-processor-8m-cache-up-to-3-90-ghz.html)
-Onboard video (with DVI-A and DVI-D ports, no HDMI)
-AMD card (in BIOS, I've enabled onboard video and set the Intel VGA controller to "Primary VGA device" - this seems to be as close to enabling iGPU that other threads mention in similar situations)
-6.7.2 (also tried 6.6.7 and 6.8.0RC5 - see notes below)

 

I manually do this (details below):
modprobe i915
chown -R nobody:users /dev/dri
chmod -R 777 /dev/dri

 

The Plex docker ( https://forums.unraid.net/topic/40463-support-linuxserverio-plex-media-server/ ) works fine until I try transcode something, then the server hangs instantly.

 

In 6.8.0RC*, the behaviour changes - as soon as I type modprobe i915 it hangs instantly - no need to start Plex:
https://forums.unraid.net/bug-reports/prereleases/modprobe-i915-causes-immediate-server-hang-r686/

 

This is what makes me think it's not the Plex docker itself, but rather something with my hardware or configuration.

 

Things I've tried:
1. Switching to UEFI
2. adding i915.alpha_support=1 to syslinux.cfg
3. adding intel_iommu=off to syslinux.cfg
4. As an aside, adding the following to "extra parameters" (because I've seen all three variations in various places):
--device=/dev/dri
--device /dev/dri:/dev/dri
--device=/dev/dri:/dev/dri

 

I've attached server diagnostics.

 

I think I've followed relevant threads on this issue but no luck yet so just looking for another set of eyes if anyone has any ideas.

 

Thanks for reading!

Additional details:
---

Linux 4.19.56-Unraid.
root@Tower:~# modprobe i915
root@Tower:~# chown -R nobody:users /dev/dri
root@Tower:~# chmod -R 777 /dev/dri
root@Tower:~# ls -la /dev/dri
total 0
drwxrwxrwx  3 nobody users      100 Nov  5 16:36 ./
drwxr-xr-x 15 root   root      3420 Nov  5 16:36 ../
drwxrwxrwx  2 nobody users       80 Nov  5 16:36 by-path/
crwxrwxrwx  1 nobody users 226,   0 Nov  5 16:36 card0
crwxrwxrwx  1 nobody users 226, 128 Nov  5 16:36 renderD128
root@Tower:~# lsmod | grep i915
i915                 1261568  1
i2c_algo_bit           16384  1 i915
iosf_mbi               16384  1 i915
drm_kms_helper        135168  1 i915
drm                   327680  3 drm_kms_helper,i915
intel_gtt              20480  1 i915
i2c_core               40960  5 drm_kms_helper,i2c_algo_bit,i2c_i801,i915,drm
video                  40960  1 i915
backlight              16384  2 video,i915
root@Tower:~# ls /etc/modprobe.d
README  blacklist-ast.conf  blacklist-i915.conf  iommu_unsafe_interrupts.conf  kvm.conf  scsi-sata-controllers.conf
root@Tower:~# lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Turks PRO [Radeon HD 7570]
root@Tower:~# systool -m i915 -av
Module = "i915"

  Attributes:
    coresize            = "1261568"
    initsize            = "0"
    initstate           = "live"
    refcnt              = "1"
    taint               = ""
    uevent              = <store method only>

  Parameters:
    alpha_support       = "N"
    disable_display     = "N"
    disable_power_well  = "1"
    dmc_firmware_path   = "(null)"
    edp_vswing          = "0"
    enable_dc           = "-1"
    enable_dp_mst       = "Y"
    enable_dpcd_backlight= "N"
    enable_fbc          = "0"
    enable_guc          = "0"
    enable_gvt          = "N"
    enable_hangcheck    = "Y"
    enable_ips          = "1"
    enable_ppgtt        = "1"
    enable_psr          = "-1"
    error_capture       = "Y"
    fastboot            = "N"
    force_reset_modeset_test= "N"
    guc_firmware_path   = "(null)"
    guc_log_level       = "0"
    huc_firmware_path   = "(null)"
    invert_brightness   = "0"
    load_detect_test    = "N"
    lvds_channel_mode   = "0"
    mmio_debug          = "0"
    modeset             = "-1"
    nuclear_pageflip    = "N"
    panel_use_ssc       = "-1"
    prefault_disable    = "N"
    reset               = "2"
    vbt_firmware        = "(null)"
    vbt_sdvo_panel_type = "-1"
    verbose_state_checks= "Y"

  Sections:
    .altinstr_aux       = "0xffffffffa0620b83"
    .altinstr_replacement= "0xffffffffa0620638"
    .altinstructions    = "0xffffffffa0656727"
    .bss                = "0xffffffffa0688dc0"
    .data..read_mostly  = "0xffffffffa0688a40"
    .data.once          = "0xffffffffa06889d0"
    .data               = "0xffffffffa0684020"
    .exit.text          = "0xffffffffa0620bdd"
    .fixup              = "0xffffffffa0620bf4"
    .gnu.linkonce.this_module= "0xffffffffa0688ac0"
    .init.text          = "0xffffffffa044a000"
    .note.Linux         = "0xffffffffa0621024"
    .note.gnu.build-id  = "0xffffffffa0621000"
    .orc_unwind         = "0xffffffffa0668ebc"
    .orc_unwind_ip      = "0xffffffffa06581dc"
    .parainstructions   = "0xffffffffa0657260"
    .rodata             = "0xffffffffa0621080"
    .rodata.str1.1      = "0xffffffffa063759c"
    .smp_locks          = "0xffffffffa0656c98"
    .strtab             = "0xffffffffa0467758"
    .symtab             = "0xffffffffa044b000"
    .text..refcount     = "0xffffffffa06207d1"
    .text               = "0xffffffffa0575000"
    .text.unlikely      = "0xffffffffa0620c71"
    __bug_table         = "0xffffffffa0685d90"
    __ex_table          = "0xffffffffa068220c"
    __jump_table        = "0xffffffffa0684000"
    __ksymtab_gpl       = "0xffffffffa0621040"
    __ksymtab_strings   = "0xffffffffa0682fd8"
    __param             = "0xffffffffa0682ab0"

---

tower-diagnostics-20191105-2355.zip

Hi @charris,

 

I have a problem similar to you. Have you been able to fix yours by any chance ?