Bug 72648 - All 3 monitor EDIDs show the same
Summary: All 3 monitor EDIDs show the same
Status: RESOLVED NOTABUG
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: XOrg git
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
QA Contact:
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-12-12 19:27 UTC by Jim Cromie
Modified: 2013-12-16 23:57 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Attachments
Xorg.0.log (53.40 KB, text/plain)
2013-12-13 15:35 UTC, Jim Cromie
no flags Details
xrandr --verbose (12.36 KB, text/plain)
2013-12-13 15:37 UTC, Jim Cromie
no flags Details
dmesg for 3.13.0-rc3-x2a-00302-g8d27637 (62.89 KB, text/plain)
2013-12-13 16:18 UTC, Jim Cromie
no flags Details
dmesg with GPU lockup (only happened once) (71.36 KB, text/plain)
2013-12-13 16:24 UTC, Jim Cromie
no flags Details

Description Jim Cromie 2013-12-12 19:27:24 UTC
I recently bought a 3rd monitor, plugged it to my radeon,
turns out its EDID is bad; it caused 2 of 3 monitors
to go to low-res, which Id reboot to correct (ick)

I fixed that with 
   drm_kms_helper.edid_firmware=VGA-1:edid/1920x1080.bin

.. which is nice, esp as its been available since 2012 :-)


what worries me is the following:
I have 3 different monitors on the 3 video connectors,
and dmesg (pasted below) confirms this.


[jimc@groucho 3.13.0-rc3-x2a-00174-g9538e10]$ for p in /sys/class/drm/card0*/edid; do echo; echo $p; echo; monitor-edid $p ; done 

/sys/class/drm/card0-DVI-D-1/edid

Name: X241W
EISA ID: ACRad99
EDID version: 1.3
EDID extension blocks: 0
Screen size: 51.8 cm x 32.4 cm (24.05 inches, aspect ratio 16/10 = 1.60)
Gamma: 2.2
Digital signal
Max video bandwidth: 170 MHz

	HorizSync 31-81
	VertRefresh 56-75

	# Monitor preferred modeline (60.0 Hz vsync, 74.0 kHz hsync, ratio 16/10, 94 dpi)
	ModeLine "1920x1200" 154 1920 1968 2000 2080 1200 1203 1209 1235 +hsync +vsync

/sys/class/drm/card0-HDMI-A-1/edid

Name: X241W
EISA ID: ACRad99
EDID version: 1.3
EDID extension blocks: 0
Screen size: 51.8 cm x 32.4 cm (24.05 inches, aspect ratio 16/10 = 1.60)
Gamma: 2.2
Digital signal
Max video bandwidth: 170 MHz

	HorizSync 31-81
	VertRefresh 56-75

	# Monitor preferred modeline (60.0 Hz vsync, 74.0 kHz hsync, ratio 16/10, 94 dpi)
	ModeLine "1920x1200" 154 1920 1968 2000 2080 1200 1203 1209 1235 +hsync +vsync

/sys/class/drm/card0-VGA-1/edid

Name: X241W
EISA ID: ACRad99
EDID version: 1.3
EDID extension blocks: 0
Screen size: 51.8 cm x 32.4 cm (24.05 inches, aspect ratio 16/10 = 1.60)
Gamma: 2.2
Digital signal
Max video bandwidth: 170 MHz

	HorizSync 31-81
	VertRefresh 56-75

	# Monitor preferred modeline (60.0 Hz vsync, 74.0 kHz hsync, ratio 16/10, 94 dpi)
	ModeLine "1920x1200" 154 1920 1968 2000 2080 1200 1203 1209 1235 +hsync +vsync




heres that dmesg grep - Im using dpm, and enabled debug-prints



[jimc@groucho 3.13.0-rc3-x2a-00174-g9538e10]$ grep -E 'radeon|drm' dmesg 
 Command line: BOOT_IMAGE=/vmlinuz-3.13.0-rc3-x2a-00174-g9538e10 root=/dev/mapper/vg_groucho-lv_root ro quiet rhgb radeon.dyndbg radeon.dpm=-1 radeon.aspm=-1 printk.time=0 LANG=en_US.UTF-8
 Kernel command line: BOOT_IMAGE=/vmlinuz-3.13.0-rc3-x2a-00174-g9538e10 root=/dev/mapper/vg_groucho-lv_root ro quiet rhgb radeon.dyndbg radeon.dpm=-1 radeon.aspm=-1 printk.time=0 LANG=en_US.UTF-8
 [drm] Initialized drm 1.1.0 20060810
 [drm] radeon kernel modesetting enabled.
 [drm] initializing kernel modesetting (CEDAR 0x1002:0x68E1 0x1787:0x3000).
 [drm] register mmio base: 0xFE9E0000
 [drm] register mmio size: 131072
 radeon 0000:01:00.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used)
 radeon 0000:01:00.0: GTT: 1024M 0x0000000040000000 - 0x000000007FFFFFFF
 [drm] Detected VRAM RAM=1024M, BAR=256M
 [drm] RAM width 64bits DDR
 [drm] radeon: 1024M of VRAM memory ready
 [drm] radeon: 1024M of GTT memory ready.
 [drm] GART: num cpu pages 262144, num gpu pages 262144
 [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
 [drm] Loading CEDAR Microcode
 [drm] PCIE GART of 1024M enabled (table at 0x000000000025D000).
 radeon 0000:01:00.0: WB enabled
 radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff880221ba2c00
 radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff880221ba2c0c
 radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c418 and cpu addr 0xffffc90010f1c418
 [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
 [drm] Driver supports precise vblank timestamp query.
 radeon 0000:01:00.0: irq 42 for MSI/MSI-X
 radeon 0000:01:00.0: radeon: using MSI.
 [drm] radeon: irq initialized.
 [drm] ring test on 0 succeeded in 1 usecs
 [drm] ring test on 3 succeeded in 1 usecs
 [drm] ring test on 5 succeeded in 1 usecs
 [drm] UVD initialized successfully.
 [drm] Enabling audio 0 support
 [drm] ib test on ring 0 succeeded in 0 usecs
 [drm] ib test on ring 3 succeeded in 0 usecs
 [drm] ib test on ring 5 succeeded
 [drm] Radeon Display Connectors
 [drm] Connector 0:
 [drm]   HDMI-A-1
 [drm]   HPD2
 [drm]   DDC: 0x6460 0x6460 0x6464 0x6464 0x6468 0x6468 0x646c 0x646c
 [drm]   Encoders:
 [drm]     DFP1: INTERNAL_UNIPHY1
 [drm] Connector 1:
 [drm]   DVI-D-1
 [drm]   HPD4
 [drm]   DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c 0x644c
 [drm]   Encoders:
 [drm]     DFP2: INTERNAL_UNIPHY
 [drm] Connector 2:
 [drm]   VGA-1
 [drm]   DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
 [drm]   Encoders:
 [drm]     CRT1: INTERNAL_KLDSCP_DAC1
 [drm] Internal thermal controller with fan control
 [drm] radeon: dpm initialized
 [drm] fb mappable at 0xD0460000
 [drm] vram apper at 0xD0000000
 [drm] size 9216000
 [drm] fb depth is 24
 [drm]    pitch is 7680
 fbcon: radeondrmfb (fb0) is primary device
 radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
 radeon 0000:01:00.0: registered panic notifier
 [drm] Initialized radeon 2.35.0 20080528 for 0000:01:00.0 on minor 0
 [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 251
 [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 244
 [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 87
 [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 241
 [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 200
 radeon 0000:01:00.0: VGA-1: EDID block 0 invalid.
 [drm:radeon_vga_detect] *ERROR* VGA-1: probed a monitor but no|invalid EDID
 [drm:radeon_vga_detect] *ERROR* VGA-1: probed a monitor but no|invalid EDID
 [drm:radeon_atom_pick_pll] *ERROR* unable to allocate a PPLL
 [drm:drm_crtc_helper_set_config] *ERROR* failed to set mode on [CRTC:12]
 [drm:radeon_vga_detect] *ERROR* VGA-1: probed a monitor but no|invalid EDID
 [drm:radeon_vga_detect] *ERROR* VGA-1: probed a monitor but no|invalid EDID
 [drm:radeon_atom_pick_pll] *ERROR* unable to allocate a PPLL
 [drm:drm_crtc_helper_set_config] *ERROR* failed to set mode on [CRTC:13]
 [drm:radeon_atom_pick_pll] *ERROR* unable to allocate a PPLL
 [drm:drm_crtc_helper_set_config] *ERROR* failed to set mode on [CRTC:14]
 [drm:radeon_vga_detect] *ERROR* VGA-1: probed a monitor but no|invalid EDID
 radeon 0000:01:00.0: GPU lockup CP stall for more than 10017msec
 radeon 0000:01:00.0: GPU lockup (waiting for 0x000000000000006b last fence id 0x0000000000000069 on ring 0)
 [drm:rv770_stop_dpm] *ERROR* Could not force DPM to low.
 [drm] Disabling audio 0 support
 radeon 0000:01:00.0: Saved 55 dwords of commands on ring 0.
 radeon 0000:01:00.0: GPU softreset: 0x00000008
 radeon 0000:01:00.0:   GRBM_STATUS               = 0xA0003828
 radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
 radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
 radeon 0000:01:00.0:   SRBM_STATUS               = 0x200000C0
 radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
 radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
 radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00010000
 radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
 radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x80018647
 radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
 radeon 0000:01:00.0: GRBM_SOFT_RESET=0x00004001
 radeon 0000:01:00.0: SRBM_SOFT_RESET=0x00000100
 radeon 0000:01:00.0:   GRBM_STATUS               = 0x00003828
 radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
 radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
 radeon 0000:01:00.0:   SRBM_STATUS               = 0x200000C0
 radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
 radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
 radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
 radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
 radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x00000000
 radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
 radeon 0000:01:00.0: GPU reset succeeded, trying to resume
 [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
 [drm] PCIE GART of 1024M enabled (table at 0x000000000025D000).
 radeon 0000:01:00.0: WB enabled
 radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff880221ba2c00
 radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff880221ba2c0c
 radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c418 and cpu addr 0xffffc90010f1c418
 [drm] ring test on 0 succeeded in 1 usecs
 [drm] ring test on 3 succeeded in 1 usecs
 [drm] ring test on 5 succeeded in 1 usecs
 [drm] UVD initialized successfully.
 [drm] Enabling audio 0 support
 [drm] ib test on ring 0 succeeded in 0 usecs
 [drm] ib test on ring 3 succeeded in 1 usecs
 [drm] ib test on ring 5 succeeded
 radeon 0000:01:00.0: GPU lockup CP stall for more than 10005msec
 radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000089 last fence id 0x0000000000000087 on ring 0)
 [drm:rv770_stop_dpm] *ERROR* Could not force DPM to low.
 [drm] Disabling audio 0 support
 radeon 0000:01:00.0: Saved 55 dwords of commands on ring 0.
 radeon 0000:01:00.0: GPU softreset: 0x00000008
 radeon 0000:01:00.0:   GRBM_STATUS               = 0xA0003828
 radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
 radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
 radeon 0000:01:00.0:   SRBM_STATUS               = 0x200000C0
 radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
 radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
 radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00010000
 radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
 radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x80018647
 radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
 radeon 0000:01:00.0: GRBM_SOFT_RESET=0x00004001
 radeon 0000:01:00.0: SRBM_SOFT_RESET=0x00000100
 radeon 0000:01:00.0:   GRBM_STATUS               = 0x00003828
 radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
 radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
 radeon 0000:01:00.0:   SRBM_STATUS               = 0x200000C0
 radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
 radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
 radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
 radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
 radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x00000000
 radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
 radeon 0000:01:00.0: GPU reset succeeded, trying to resume
 [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
 [drm] PCIE GART of 1024M enabled (table at 0x000000000025D000).
 radeon 0000:01:00.0: WB enabled
 radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff880221ba2c00
 radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff880221ba2c0c
 radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c418 and cpu addr 0xffffc90010f1c418
 [drm] ring test on 0 succeeded in 1 usecs
 [drm] ring test on 3 succeeded in 1 usecs
 [drm] ring test on 5 succeeded in 1 usecs
 [drm] UVD initialized successfully.
 [drm] Enabling audio 0 support
 [drm] ib test on ring 0 succeeded in 0 usecs
 [drm] ib test on ring 3 succeeded in 1 usecs
 [drm] ib test on ring 5 succeeded
 radeon 0000:01:00.0: GPU lockup CP stall for more than 10006msec
 radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000166 last fence id 0x0000000000000164 on ring 0)
 [drm:rv770_stop_dpm] *ERROR* Could not force DPM to low.
 [drm] Disabling audio 0 support
 radeon 0000:01:00.0: Saved 55 dwords of commands on ring 0.
 radeon 0000:01:00.0: GPU softreset: 0x00000008
 radeon 0000:01:00.0:   GRBM_STATUS               = 0xA0003828
 radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
 radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
 radeon 0000:01:00.0:   SRBM_STATUS               = 0x20000AC0
 radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
 radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
 radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00010000
 radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
 radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x80018647
 radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
 radeon 0000:01:00.0: GRBM_SOFT_RESET=0x00004001
 radeon 0000:01:00.0: SRBM_SOFT_RESET=0x00000100
 radeon 0000:01:00.0:   GRBM_STATUS               = 0x00003828
 radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
 radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
 radeon 0000:01:00.0:   SRBM_STATUS               = 0x200000C0
 radeon 0000:01:00.0:   SRBM_STATUS2              = 0x00000000
 radeon 0000:01:00.0:   R_008674_CP_STALLED_STAT1 = 0x00000000
 radeon 0000:01:00.0:   R_008678_CP_STALLED_STAT2 = 0x00000000
 radeon 0000:01:00.0:   R_00867C_CP_BUSY_STAT     = 0x00000000
 radeon 0000:01:00.0:   R_008680_CP_STAT          = 0x00000000
 radeon 0000:01:00.0:   R_00D034_DMA_STATUS_REG   = 0x44C83D57
 radeon 0000:01:00.0: GPU reset succeeded, trying to resume
 [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
 [drm] PCIE GART of 1024M enabled (table at 0x000000000025D000).
 radeon 0000:01:00.0: WB enabled
 radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff880221ba2c00
 radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff880221ba2c0c
 radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c418 and cpu addr 0xffffc90010f1c418
 [drm] ring test on 0 succeeded in 1 usecs
 [drm] ring test on 3 succeeded in 1 usecs
 [drm] ring test on 5 succeeded in 1 usecs
 [drm] UVD initialized successfully.
 [drm] Enabling audio 0 support
 [drm] ib test on ring 0 succeeded in 0 usecs
 [drm] ib test on ring 3 succeeded in 1 usecs
 [drm] ib test on ring 5 succeeded


apologies if those logs should have been done as attachemnts
Comment 1 Alex Deucher 2013-12-12 20:53:56 UTC
Please attach your xorg log, xrandr --verbose, and dmesg output.
Comment 2 Jim Cromie 2013-12-13 15:35:05 UTC
Created attachment 90726 [details]
Xorg.0.log
Comment 3 Jim Cromie 2013-12-13 15:37:36 UTC
Created attachment 90727 [details]
xrandr --verbose
Comment 4 Alex Deucher 2013-12-13 15:38:43 UTC
According to your log, all the EDIDs are correct.  It looks like the drm sysfs layer incorrectly reports the same edid for connectors via sysfs, but the driver has the correct information.
Comment 5 Jim Cromie 2013-12-13 16:18:34 UTC
Created attachment 90730 [details]
dmesg for 3.13.0-rc3-x2a-00302-g8d27637

I have rebooted since opening this bug-report.
The next reboot didnt have the GPU-lockup that was present in
the original report:

 radeon 0000:01:00.0: GPU lockup CP stall for more than 10017msec
 radeon 0000:01:00.0: GPU lockup (waiting for 0x000000000000006b last fence id 0x0000000000000069 on ring 0)
 [drm:rv770_stop_dpm] *ERROR* Could not force DPM to low.
 [drm] Disabling audio 0 support
 radeon 0000:01:00.0: Saved 55 dwords of commands on ring 0.
 radeon 0000:01:00.0: GPU softreset: 0x00000008
 radeon 0000:01:00.0:   GRBM_STATUS               = 0xA0003828
 radeon 0000:01:00.0:   GRBM_STATUS_SE0           = 0x00000007
 radeon 0000:01:00.0:   GRBM_STATUS_SE1           = 0x00000007
...


this and the previous attachments are from a later reboot,
to keep things consistent at least.
Comment 6 Jim Cromie 2013-12-13 16:24:30 UTC
Created attachment 90733 [details]
dmesg with GPU lockup (only happened once)

This is the dmesg from the original report.
Its from a slightly older kernel:
3.13.0-rc3-x2a-00174-g9538e10-1stboot/dmesg

the GPU lockup didnt happen on 2ndboot (of same kernel),
I have that too and will attach it if you want to see it too.
Comment 7 Alex Deucher 2013-12-13 16:50:15 UTC
A GPU lockup is a separate issue and is usually caused by bugs in the userspace drivers (mesa or ddx).  I'd suggest upgrading your userspace stack if you are using an older version.
Comment 8 Jim Cromie 2013-12-13 18:12:29 UTC
(In reply to comment #4)
> According to your log, all the EDIDs are correct.  It looks like the drm
> sysfs layer incorrectly reports the same edid for connectors via sysfs, but
> the driver has the correct information.


yes, 3 different monitors are identified:

[jimc@groucho bootlogs]$ grep Manufacturer /var/log/Xorg.0.log
[    30.170] (II) RADEON(0): Manufacturer: DEL  Model: a039  Serial#: 876102485
[    30.171] (II) RADEON(0): Manufacturer's mask: 0
[    30.205] (II) RADEON(0): Manufacturer: ACR  Model: ad99  Serial#: 1914720286
[    30.206] (II) RADEON(0): Manufacturer's mask: 0
[    30.269] (II) RADEON(0): Manufacturer: LNX  Model: 0  Serial#: 0
[    30.269] (II) RADEON(0): Manufacturer's mask: 0

fwiw, the last one is an AOC E2252S monitor,
I guess "LNX" is a placeholder/default due to the Raw EDID errors, 
happening since I plugged in the AOC.

[    2.362551] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 153
[    2.362594] Raw EDID:
[    2.362601]          00 ff ff ff ff ff ff 00 05 e3 52 22 db 06 00 00
[    2.362623]          1b 17 01 03 68 30 1b 78 2a ee d1 a5 55 48 37 ff
[    2.362644]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[    2.362666]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[    2.362687]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[    2.362709]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[    2.362731]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[    2.362752]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff


Those remainder errors appear to be random, varying between the 2 boots
of the rc3-00174 kernel that I recorded (and the others too)

[jimc@groucho bootlogs]$ grep remainder 3.13.0-rc3-x2a-00174-g9538e10-*/dmesg | sort -t: -k2
3.13.0-rc3-x2a-00174-g9538e10-2ndboot/dmesg: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 119
3.13.0-rc3-x2a-00174-g9538e10-2ndboot/dmesg: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
3.13.0-rc3-x2a-00174-g9538e10-2ndboot/dmesg: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 130
3.13.0-rc3-x2a-00174-g9538e10-1stboot/dmesg: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 200
3.13.0-rc3-x2a-00174-g9538e10-1stboot/dmesg: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 241
3.13.0-rc3-x2a-00174-g9538e10-2ndboot/dmesg: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 243
3.13.0-rc3-x2a-00174-g9538e10-1stboot/dmesg: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 244
3.13.0-rc3-x2a-00174-g9538e10-1stboot/dmesg: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 251
3.13.0-rc3-x2a-00174-g9538e10-1stboot/dmesg: [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 87


So I agree that sysfs is somehow to blame for the original worry.
I guess I'll post over on LKML, and refer back to this bug-rpt.
After testing if the EDID cmdline addition might be involved.
Comment 9 Alex Deucher 2013-12-13 18:19:50 UTC
(In reply to comment #8)

> fwiw, the last one is an AOC E2252S monitor,
> I guess "LNX" is a placeholder/default due to the Raw EDID errors, 
> happening since I plugged in the AOC.

Yes, it comes from edid/1920x1080.bin

> 
> So I agree that sysfs is somehow to blame for the original worry.
> I guess I'll post over on LKML, and refer back to this bug-rpt.
> After testing if the EDID cmdline addition might be involved.

You might try dri-devel.
Comment 10 Jim Cromie 2013-12-13 18:22:14 UTC
(In reply to comment #7)
> A GPU lockup is a separate issue and is usually caused by bugs in the
> userspace drivers (mesa or ddx).  I'd suggest upgrading your userspace stack
> if you are using an older version.


hmm.  Im on Fedora-19, updated a few days ago:

Dec 09 08:51:39 Updated: mesa-libglapi-9.2.4-1.20131128.fc19.x86_64
Dec 09 08:51:40 Updated: mesa-libGL-9.2.4-1.20131128.fc19.x86_64
Dec 09 08:52:17 Updated: mesa-libgbm-9.2.4-1.20131128.fc19.x86_64
Dec 09 08:52:18 Updated: mesa-libEGL-9.2.4-1.20131128.fc19.x86_64
Dec 09 08:52:52 Updated: mesa-filesystem-9.2.4-1.20131128.fc19.x86_64
Dec 09 08:53:32 Updated: mesa-dri-drivers-9.2.4-1.20131128.fc19.x86_64
Dec 09 08:54:13 Updated: mesa-libEGL-devel-9.2.4-1.20131128.fc19.x86_64
Dec 09 08:54:39 Updated: mesa-libGL-devel-9.2.4-1.20131128.fc19.x86_64
Dec 09 08:56:45 Updated: mesa-libwayland-egl-9.2.4-1.20131128.fc19.x86_64
Dec 09 08:56:47 Updated: mesa-libxatracker-9.2.4-1.20131128.fc19.x86_64


I only saw the error once, and I didnt notice any misbehavior
(that said, recent behavior wrt low-res may have masked it).

Is there anything I should watch for and report ?
Comment 11 Jim Cromie 2013-12-13 23:29:22 UTC
update:

prepping the crow now..

original bug report was based upon this showing same monitor 3 times:

$ for p in /sys/class/drm/card0*/edid; do 
  echo; echo $p; echo; 
  monitor-edid $p ; 
done 

but those sysfs files are really different

$ pwd
/sys/devices/pci0000:00/0000:00:02.0/0000:01:00.0/drm/card0
$ sum card0-*/edid
14477     1 card0-DVI-D-1/edid
51583     1 card0-HDMI-A-1/edid
64619     1 card0-VGA-1/edid


and my script works as expected with monitor-parse-edid

sorry for the noise


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