[Bug 106850] Occasionally random uninitialised memory appears to be dumped when applications fullscreen or the VT is switched
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Thu Jun 7 17:03:00 UTC 2018
https://bugs.freedesktop.org/show_bug.cgi?id=106850
--- Comment #4 from fdbugs at fratti.ch ---
(In reply to Chris Wilson from comment #3)
> What I think might be useful would be cat
> /sys/kernel/debug/dri/0/i915_display_info when switched away. The first
> thought is that looks like garbage in a sprite plane, hence checking what
> planes/fb are still active after VT switch.
When switched away from the VT in which the bug occurs, or when switched to the
VT where the bug occurs?
Here's when it's occurring on tty2 and I'm switched to Xorg:
CRTC info
---------
CRTC 37: pipe: A, active=yes, (size=1920x1080), dither=no, bpp=24
fb: 80, pos: 0x0, size: 1920x1080
encoder 58: type: DDI A, connectors:
connector 59: type: eDP-1, status: connected, mode:
id 0:"1920x1080" freq 60 clock 138500 hdisp 1920 hss 1968 hse
2000 htot 2080 vdisp 1080 vss 1083 vse 1088 vtot 1111 type 0x48 flags 0xa
cursor visible? no, position (0, 0), size 0x0, addr 0x00000000
num_scalers=2, scaler_users=0 scaler_id=-1, scalers[0]: use=no, mode=0,
scalers[1]: use=no, mode=0
--Plane id 28: type=PRI, crtc_pos= 0x 0, crtc_size=1920x1080,
src_pos=0.0000x0.0000, src_size=1920.0000x1080.0000, format=XR24 little-endian
(0x34325258), rotation=0 (0x00000001)
--Plane id 31: type=OVL, crtc_pos= 0x 0, crtc_size= 0x 0,
src_pos=0.0000x0.0000, src_size=0.0000x0.0000, format=N/A, rotation=0
(0x00000001)
--Plane id 34: type=CUR, crtc_pos= 0x 0, crtc_size= 0x 0,
src_pos=0.0000x0.0000, src_size=0.0000x0.0000, format=N/A, rotation=0
(0x00000001)
underrun reporting: cpu=yes pch=yes
CRTC 47: pipe: B, active=no, (size=0x0), dither=no, bpp=0
underrun reporting: cpu=yes pch=yes
CRTC 57: pipe: C, active=no, (size=0x0), dither=no, bpp=0
underrun reporting: cpu=yes pch=yes
Connector info
--------------
connector 59: type eDP-1, status: connected
name:
physical dimensions: 290x170mm
subpixel order: Unknown
CEA rev: 0
DPCD rev: 12
audio support: no
fixed mode:
id 63:"1920x1080" freq 60 clock 138500 hdisp 1920 hss 1968 hse
2000 htot 2080 vdisp 1080 vss 1083 vse 1088 vtot 1111 type 0x48 flags 0xa
DP branch device present: no
modes:
id 60:"1920x1080" freq 60 clock 138500 hdisp 1920 hss 1968 hse
2000 htot 2080 vdisp 1080 vss 1083 vse 1088 vtot 1111 type 0x48 flags 0xa
id 61:"1920x1080" freq 48 clock 110920 hdisp 1920 hss 1968 hse
2000 htot 2080 vdisp 1080 vss 1083 vse 1088 vtot 1111 type 0x40 flags 0xa
connector 67: type DP-1, status: disconnected
DPCD rev: 0
audio support: no
DP branch device present: no
modes:
connector 72: type HDMI-A-1, status: disconnected
audio support: no
modes:
connector 75: type HDMI-A-2, status: disconnected
audio support: no
modes:
Here's when it's happening on tty2 and I am on tty2:
CRTC info
---------
CRTC 37: pipe: A, active=yes, (size=1920x1080), dither=no, bpp=24
fb: 78, pos: 0x0, size: 1920x1080
encoder 58: type: DDI A, connectors:
connector 59: type: eDP-1, status: connected, mode:
id 0:"1920x1080" freq 60 clock 138500 hdisp 1920 hss 1968 hse
2000 htot 2080 vdisp 1080 vss 1083 vse 1088 vtot 1111 type 0x48 flags 0xa
cursor visible? no, position (0, 0), size 0x0, addr 0x00000000
num_scalers=2, scaler_users=0 scaler_id=-1, scalers[0]: use=no, mode=0,
scalers[1]: use=no, mode=0
--Plane id 28: type=PRI, crtc_pos= 0x 0, crtc_size=1920x1080,
src_pos=0.0000x0.0000, src_size=1920.0000x1080.0000, format=XR24 little-endian
(0x34325258), rotation=0 (0x00000001)
--Plane id 31: type=OVL, crtc_pos= 0x 0, crtc_size= 0x 0,
src_pos=0.0000x0.0000, src_size=0.0000x0.0000, format=N/A, rotation=0
(0x00000001)
--Plane id 34: type=CUR, crtc_pos= 0x 0, crtc_size= 0x 0,
src_pos=0.0000x0.0000, src_size=0.0000x0.0000, format=N/A, rotation=0
(0x00000001)
underrun reporting: cpu=yes pch=yes
CRTC 47: pipe: B, active=no, (size=0x0), dither=no, bpp=0
underrun reporting: cpu=yes pch=yes
CRTC 57: pipe: C, active=no, (size=0x0), dither=no, bpp=0
underrun reporting: cpu=yes pch=yes
Connector info
--------------
connector 59: type eDP-1, status: connected
name:
physical dimensions: 290x170mm
subpixel order: Unknown
CEA rev: 0
DPCD rev: 12
audio support: no
fixed mode:
id 63:"1920x1080" freq 60 clock 138500 hdisp 1920 hss 1968 hse
2000 htot 2080 vdisp 1080 vss 1083 vse 1088 vtot 1111 type 0x48 flags 0xa
DP branch device present: no
modes:
id 60:"1920x1080" freq 60 clock 138500 hdisp 1920 hss 1968 hse
2000 htot 2080 vdisp 1080 vss 1083 vse 1088 vtot 1111 type 0x48 flags 0xa
id 61:"1920x1080" freq 48 clock 110920 hdisp 1920 hss 1968 hse
2000 htot 2080 vdisp 1080 vss 1083 vse 1088 vtot 1111 type 0x40 flags 0xa
connector 67: type DP-1, status: disconnected
DPCD rev: 0
audio support: no
DP branch device present: no
modes:
connector 72: type HDMI-A-1, status: disconnected
audio support: no
modes:
connector 75: type HDMI-A-2, status: disconnected
audio support: no
modes:
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