* [Bug 214725] New: simpledrm and i915 both active after boot
@ 2021-10-14 23:28 bugzilla-daemon
2021-11-09 7:55 ` [Bug 214725] " bugzilla-daemon
2021-11-09 8:57 ` [Bug 214725] New: " Thomas Zimmermann
0 siblings, 2 replies; 3+ messages in thread
From: bugzilla-daemon @ 2021-10-14 23:28 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=214725
Bug ID: 214725
Summary: simpledrm and i915 both active after boot
Product: Drivers
Version: 2.5
Kernel Version: 5.14.11
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
Assignee: drivers_video-dri@kernel-bugs.osdl.org
Reporter: dennis.lissov@gmail.com
Regression: No
Gentoo Linux, custom kernel build, 5.14.11 with
CONFIG_DRM_SIMPLEDRM=y
CONFIG_DRM_I915=y
Plasma (wayland) sees two monitors: the laptop screen and an unknown one. The
only monitor physically present is the laptop screen. This did not happen a few
months ago (possibly started with 5.14 upgrade).
$ ls /sys/class/drm/
card0 card0-eDP-1 card1 card1-Unknown-1 card2 card2-DP-1 card2-DP-2
card2-DP-3 renderD128 renderD129 version
$ readlink /sys/class/drm/card0 # Intel GPU
../../devices/pci0000:00/0000:00:02.0/drm/card0
$ readlink /sys/class/drm/card1 # Simple DRM
../../devices/platform/simple-framebuffer.0/drm/card1
$ readlink /sys/class/drm/card2 # Nouveau (not used at the moment)
../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card2
$ dmesg | egrep '(simple|i915)'
[ 0.000000] Command line: BOOT_IMAGE=/kernel-5.14.11 root=[...] ro
acpi_backlight=video resume=[...] i915.enable_gvt=1 quiet
[ 0.060342] Kernel command line: BOOT_IMAGE=/kernel-5.14.11 root=[...] ro
acpi_backlight=video resume=[...] i915.enable_gvt=1 quiet
[ 1.076957] i915 0000:00:02.0: [drm] VT-d active for gfx access
[ 1.076961] i915 0000:00:02.0: vgaarb: deactivate vga console
[ 1.387359] i915 0000:00:02.0: Direct firmware load for
i915/gvt/vid_0x8086_did_0x191b_rid_0x06.golden_hw_state failed with error -2
[ 1.404418] i915 0000:00:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=none:owns=io+mem
[ 1.404525] i915 0000:00:02.0: [drm] Disabling framebuffer compression (FBC)
to prevent screen flicker with VT-d enabled
[ 1.404931] i915 0000:00:02.0: [drm] Finished loading DMC firmware
i915/skl_dmc_ver1_27.bin (v1.27)
[ 1.422128] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor
0
[ 1.425127] [drm] Initialized simpledrm 1.0.0 20200625 for
simple-framebuffer.0 on minor 1
[ 1.437859] simple-framebuffer simple-framebuffer.0: [drm] fb0: simpledrm
frame buffer device
[ 1.438058] fbcon: i915 (fb1) is primary device
[ 2.579133] i915 0000:00:02.0: [drm] fb1: i915 frame buffer device
[ 22.162612] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops
i915_audio_component_bind_ops)
[ 52.106084] simple-framebuffer simple-framebuffer.0: swiotlb buffer is full
(sz: 8388608 bytes), total 32768 (slots), used 0 (slots)
Looks like the hand-over mechanism does not correctly handle this combination,
possibly due to i915 loading before simpledrm.
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* [Bug 214725] simpledrm and i915 both active after boot
2021-10-14 23:28 [Bug 214725] New: simpledrm and i915 both active after boot bugzilla-daemon
@ 2021-11-09 7:55 ` bugzilla-daemon
2021-11-09 8:57 ` [Bug 214725] New: " Thomas Zimmermann
1 sibling, 0 replies; 3+ messages in thread
From: bugzilla-daemon @ 2021-11-09 7:55 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=214725
Jani Nikula (jani.nikula@intel.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jani Nikula (jani.nikula@intel.com) ---
Please file drm/i915 bugs at freedesktop.org gitlab.
https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs
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* Re: [Bug 214725] New: simpledrm and i915 both active after boot
2021-10-14 23:28 [Bug 214725] New: simpledrm and i915 both active after boot bugzilla-daemon
2021-11-09 7:55 ` [Bug 214725] " bugzilla-daemon
@ 2021-11-09 8:57 ` Thomas Zimmermann
1 sibling, 0 replies; 3+ messages in thread
From: Thomas Zimmermann @ 2021-11-09 8:57 UTC (permalink / raw)
To: dri-devel, dennis.lissov
[-- Attachment #1.1: Type: text/plain, Size: 3843 bytes --]
Hi
Am 15.10.21 um 01:28 schrieb bugzilla-daemon@bugzilla.kernel.org:
> https://bugzilla.kernel.org/show_bug.cgi?id=214725
>
> Bug ID: 214725
> Summary: simpledrm and i915 both active after boot
> Product: Drivers
> Version: 2.5
> Kernel Version: 5.14.11
> Hardware: All
> OS: Linux
> Tree: Mainline
> Status: NEW
> Severity: normal
> Priority: P1
> Component: Video(DRI - non Intel)
> Assignee: drivers_video-dri@kernel-bugs.osdl.org
> Reporter: dennis.lissov@gmail.com
> Regression: No
>
> Gentoo Linux, custom kernel build, 5.14.11 with
> CONFIG_DRM_SIMPLEDRM=y
> CONFIG_DRM_I915=y
>
> Plasma (wayland) sees two monitors: the laptop screen and an unknown one. The
> only monitor physically present is the laptop screen. This did not happen a few
> months ago (possibly started with 5.14 upgrade).
>
> $ ls /sys/class/drm/
> card0 card0-eDP-1 card1 card1-Unknown-1 card2 card2-DP-1 card2-DP-2
> card2-DP-3 renderD128 renderD129 version
> $ readlink /sys/class/drm/card0 # Intel GPU
> ../../devices/pci0000:00/0000:00:02.0/drm/card0
> $ readlink /sys/class/drm/card1 # Simple DRM
> ../../devices/platform/simple-framebuffer.0/drm/card1
> $ readlink /sys/class/drm/card2 # Nouveau (not used at the moment)
> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card2
>
> $ dmesg | egrep '(simple|i915)'
> [ 0.000000] Command line: BOOT_IMAGE=/kernel-5.14.11 root=[...] ro
> acpi_backlight=video resume=[...] i915.enable_gvt=1 quiet
> [ 0.060342] Kernel command line: BOOT_IMAGE=/kernel-5.14.11 root=[...] ro
> acpi_backlight=video resume=[...] i915.enable_gvt=1 quiet
> [ 1.076957] i915 0000:00:02.0: [drm] VT-d active for gfx access
> [ 1.076961] i915 0000:00:02.0: vgaarb: deactivate vga console
> [ 1.387359] i915 0000:00:02.0: Direct firmware load for
> i915/gvt/vid_0x8086_did_0x191b_rid_0x06.golden_hw_state failed with error -2
> [ 1.404418] i915 0000:00:02.0: vgaarb: changed VGA decodes:
> olddecodes=io+mem,decodes=none:owns=io+mem
> [ 1.404525] i915 0000:00:02.0: [drm] Disabling framebuffer compression (FBC)
> to prevent screen flicker with VT-d enabled
> [ 1.404931] i915 0000:00:02.0: [drm] Finished loading DMC firmware
> i915/skl_dmc_ver1_27.bin (v1.27)
> [ 1.422128] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor
> 0
> [ 1.425127] [drm] Initialized simpledrm 1.0.0 20200625 for
> simple-framebuffer.0 on minor 1
> [ 1.437859] simple-framebuffer simple-framebuffer.0: [drm] fb0: simpledrm
> frame buffer device
> [ 1.438058] fbcon: i915 (fb1) is primary device
> [ 2.579133] i915 0000:00:02.0: [drm] fb1: i915 frame buffer device
> [ 22.162612] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops
> i915_audio_component_bind_ops)
> [ 52.106084] simple-framebuffer simple-framebuffer.0: swiotlb buffer is full
> (sz: 8388608 bytes), total 32768 (slots), used 0 (slots)
>
> Looks like the hand-over mechanism does not correctly handle this combination,
> possibly due to i915 loading before simpledrm.
>
Interesting. There are two workarounds:
* build every driver except simpledrm as module, or
* don't build simpledrm on yur system (it's Gentoo)
I don't think that linking all driver into the kernel worked before
simpledrm. Before simpledrm there would be simplefb, efifb or vesafb.
Those drivers use a similar handover scheme, which would have failed in
a similar way.
Best regards
Thomas
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
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2021-10-14 23:28 [Bug 214725] New: simpledrm and i915 both active after boot bugzilla-daemon
2021-11-09 7:55 ` [Bug 214725] " bugzilla-daemon
2021-11-09 8:57 ` [Bug 214725] New: " Thomas Zimmermann
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