Bug 216143 - [bisected] garbled screen when starting X + dmesg cluttered with "[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!"
Summary: [bisected] garbled screen when starting X + dmesg cluttered with "[drm:amdgpu...
Status: RESOLVED OBSOLETE
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_video-dri
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-06-17 21:44 UTC by Erhard F.
Modified: 2023-02-16 23:21 UTC (History)
4 users (show)

See Also:
Kernel Version: v5.19-rc2
Subsystem:
Regression: Yes
Bisected commit-id:


Attachments
kernel dmesg (kernel 5.19-rc2, AMD Ryzen 9 5950X) (89.11 KB, text/plain)
2022-06-17 21:44 UTC, Erhard F.
Details
kernel .config (kernel 5.19-rc2, AMD Ryzen 9 5950X) (118.19 KB, text/plain)
2022-06-17 21:45 UTC, Erhard F.
Details
Xorg.0.log (31.51 KB, text/plain)
2022-06-17 21:45 UTC, Erhard F.
Details
bisect.log (3.17 KB, text/plain)
2022-06-17 21:45 UTC, Erhard F.
Details
kernel dmesg (kernel 6.0-rc1, AMD Ryzen 9 5950X) (96.03 KB, text/plain)
2022-08-15 14:09 UTC, Erhard F.
Details
kernel .config (kernel 6.0-rc1, AMD Ryzen 9 5950X) (118.74 KB, text/plain)
2022-08-15 14:10 UTC, Erhard F.
Details
kernel .config (kernel 5.19.4, AMD Ryzen 9 5950X) (119.81 KB, text/plain)
2022-08-27 13:46 UTC, Erhard F.
Details
kernel dmesg (kernel 6.1-rc5, AMD Ryzen 9 5950X) (73.85 KB, text/plain)
2022-11-14 22:58 UTC, Erhard F.
Details
kernel .config (kernel 6.1-rc5, AMD Ryzen 9 5950X) (120.38 KB, text/plain)
2022-11-14 23:00 UTC, Erhard F.
Details

Description Erhard F. 2022-06-17 21:44:45 UTC
Created attachment 301196 [details]
kernel dmesg (kernel 5.19-rc2, AMD Ryzen 9 5950X)

Starting with kernel v5.18 series I get a severly garbled screen on my system and lotsa "[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!" in dmesg. Kernel v5.19-rc2 still got this flaw.

Kernel dmesg looks like that:
[...]
[drm] Initialized amdgpu 3.47.0 20150101 for 0000:09:00.0 on minor 0
fbcon: amdgpudrmfb (fb0) is primary device
[drm] DSC precompute is not needed.
Console: switching to colour frame buffer device 240x67
amdgpu 0000:09:00.0: [drm] fb0: amdgpudrmfb frame buffer device
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -22!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[...]

Apart from that the machine runs fine without X. Xorg.0.log states X also gets started, seeminlgy without problems.

Kernel v5.17 series was all good so I did a bisect which revealed this as 1st bad commit:

 # git bisect good
c18a2a280c073f70569a91ef0d7434d12e66e200 is the first bad commit
commit c18a2a280c073f70569a91ef0d7434d12e66e200
Merge: 70da382e1c5b 94f4c4965e55
Author: Dave Airlie <airlied@redhat.com>
Date:   Sat Apr 23 15:00:33 2022 +1000

    Merge tag 'drm-misc-fixes-2022-04-22' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
    
    Two fixes for the raspberrypi panel initialisation, one fix for a logic
    inversion in radeon, a build and pm refcounting fix for vc4, two reverts
    for drm_of_get_bridge that caused a number of regression and a locking
    regression for amdgpu.
    
    Signed-off-by: Dave Airlie <airlied@redhat.com>
    
    From: Maxime Ripard <maxime@cerno.tech>
    Link: https://patchwork.freedesktop.org/patch/msgid/20220422084403.2xrhf3jusdej5yo4@houat

 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c             |  21 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c            |   2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.h            |   1 +
 drivers/gpu/drm/drm_of.c                           |  84 +++----
 .../gpu/drm/panel/panel-raspberrypi-touchscreen.c  |  13 +-
 drivers/gpu/drm/radeon/radeon_sync.c               |   2 +-
 drivers/gpu/drm/vc4/Kconfig                        |   3 +
 drivers/gpu/drm/vc4/vc4_dsi.c                      |   2 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_bo.c                 |  43 ++--
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c                |   8 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_surface.c            |   7 +-
 include/linux/dma-buf-map.h                        | 266 ---------------------
 12 files changed, 94 insertions(+), 358 deletions(-)
 delete mode 100644 include/linux/dma-buf-map.h


Some data about the machine:

 # lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Root Complex
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Starship/Matisse IOMMU
00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge
00:01.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP Bridge
00:01.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP Bridge
00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge
00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge
00:03.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse GPP Bridge
00:04.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge
00:05.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge
00:07.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge
00:07.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B]
00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge
00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B]
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 61)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 5
00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 6
00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse/Vermeer Data Fabric: Device 18h; Function 7
01:00.0 Non-Volatile memory controller: Kingston Technology Company, Inc. A2000 NVMe SSD (rev 03)
02:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset USB 3.1 XHCI Controller (rev 01)
02:00.1 SATA controller: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset SATA Controller (rev 01)
02:00.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Bridge (rev 01)
03:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port (rev 01)
03:01.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port (rev 01)
03:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port (rev 01)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
07:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Upstream Port of PCI Express Switch (rev c5)
08:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Downstream Port of PCI Express Switch
09:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 14 [Radeon RX 5500/5500M / Pro 5500M] (rev c5)
09:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 HDMI Audio
0a:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Function
0b:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Reserved SPP
0b:00.1 Encryption controller: Advanced Micro Devices, Inc. [AMD] Starship/Matisse Cryptographic Coprocessor PSPCPP
0b:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host Controller
0b:00.4 Audio device: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD Audio Controller

 # lspci -v -s 09:00.0
09:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 14 [Radeon RX 5500/5500M / Pro 5500M] (rev c5) (prog-if 00 [VGA controller])
	Subsystem: ASRock Incorporation Navi 14 [Radeon RX 5500/5500M / Pro 5500M]
	Flags: bus master, fast devsel, latency 0, IRQ 81, IOMMU group 18
	Memory at d0000000 (64-bit, prefetchable) [size=256M]
	Memory at e0000000 (64-bit, prefetchable) [size=2M]
	I/O ports at e000 [size=256]
	Memory at c0300000 (32-bit, non-prefetchable) [size=512K]
	Expansion ROM at 000c0000 [disabled] [size=128K]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
	Capabilities: [64] Express Legacy Endpoint, MSI 00
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [150] Advanced Error Reporting
	Capabilities: [200] Physical Resizable BAR
	Capabilities: [240] Power Budgeting <?>
	Capabilities: [270] Secondary PCI Express
	Capabilities: [2a0] Access Control Services
	Capabilities: [2b0] Address Translation Service (ATS)
	Capabilities: [2c0] Page Request Interface (PRI)
	Capabilities: [2d0] Process Address Space ID (PASID)
	Capabilities: [320] Latency Tolerance Reporting
	Capabilities: [400] Data Link Feature <?>
	Capabilities: [410] Physical Layer 16.0 GT/s <?>
	Capabilities: [440] Lane Margining at the Receiver <?>
	Kernel driver in use: amdgpu
	Kernel modules: amdgpu

 # inxi -bZ
System:
  Host: supah Kernel: 5.19.0-rc2-Zen3 x86_64 bits: 64 Console: pty pts/0
    Distro: Gentoo Base System release 2.8
Machine:
  Type: Desktop Mobo: ASRock model: B450M Steel Legend serial: M80-D1005301508
    UEFI: American Megatrends v: P4.30 date: 02/25/2022
CPU:
  Info: 16-core AMD Ryzen 9 5950X [MT MCP] speed (MHz): avg: 616 min/max: 550/5084
Graphics:
  Device-1: AMD Navi 14 [Radeon RX 5500/5500M / Pro 5500M] driver: amdgpu v: kernel
  Display: server: X.org 1.21.1.3 driver: loaded: amdgpu,ati unloaded: fbdev,modesetting,radeon
    tty: 211x54
  Message: Advanced graphics data unavailable in console for root.
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169
Comment 1 Erhard F. 2022-06-17 21:45:12 UTC
Created attachment 301197 [details]
kernel .config (kernel 5.19-rc2, AMD Ryzen 9 5950X)
Comment 2 Erhard F. 2022-06-17 21:45:31 UTC
Created attachment 301198 [details]
Xorg.0.log
Comment 3 Erhard F. 2022-06-17 21:45:48 UTC
Created attachment 301199 [details]
bisect.log
Comment 4 Erhard F. 2022-06-17 22:08:01 UTC
Ok, seems to be commit   94f4c4965e5513ba624488f4b601d6b385635aec drm/amdgpu: partial revert "remove ctx->lock" v2   specifically.

Reverting it on top of v5.19-rc2 gives me working X again and also the "[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!" errors disappear from dmesg.
Comment 5 Alex Deucher 2022-06-27 21:31:27 UTC
Does this patch help?
https://patchwork.freedesktop.org/patch/490475/
Comment 6 Erhard F. 2022-06-28 00:04:58 UTC
It does not apply on top of 5.18.7 nor on top of 5.19-rc4.
Comment 7 Erhard F. 2022-07-02 22:14:42 UTC
(In reply to Alex Deucher from comment #5)
> Does this patch help?
> https://patchwork.freedesktop.org/patch/490475/
Had a closer look at the patch as it did not apply on top of v5.19-rc4. Seems like almost all of the patch diff is already in upstream v5.19-rc4. Only thing left to patch is:

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c	2022-07-02 21:59:53.171528202 +0200
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c	2022-07-02 23:12:13.481985665 +0200
@@ -579,16 +579,6 @@ static int amdgpu_cs_parser_bos(struct a
 		e->bo_va = amdgpu_vm_bo_find(vm, bo);
 	}
 
-	/* Move fence waiting after getting reservation lock of
-	 * PD root. Then there is no need on a ctx mutex lock.
-	 */
-	r = amdgpu_ctx_wait_prev_fence(p->ctx, p->entity);
-	if (unlikely(r != 0)) {
-		if (r != -ERESTARTSYS)
-			DRM_ERROR("amdgpu_ctx_wait_prev_fence failed.\n");
-		goto error_validate;
-	}
-
 	amdgpu_cs_get_threshold_for_moves(p->adev, &p->bytes_moved_threshold,
 					  &p->bytes_moved_vis_threshold);
 	p->bytes_moved = 0;
@@ -947,7 +937,7 @@ static int amdgpu_cs_ib_fill(struct amdg
 	if (parser->job->uf_addr && ring->funcs->no_user_fence)
 		return -EINVAL;
 
-	return 0;
+	return amdgpu_ctx_wait_prev_fence(parser->ctx, parser->entity);
 }
 
 static int amdgpu_cs_process_fence_dep(struct amdgpu_cs_parser *p,


But applying this on top of v5.19-rc4 does not help either. I still need to revert 94f4c4965e5513ba624488f4b601d6b385635aec to get X going.
Comment 8 Erhard F. 2022-07-10 11:02:15 UTC
Tried https://cgit.freedesktop.org/drm/drm-misc/commit/?h=drm-misc-fixes&id=925b6e59138cefa47275c67891c65d48d3266d57 suggested in https://gitlab.freedesktop.org/drm/amd/-/issues/2050#note_1461646 but it did not work out. This bug here seems an entirely different matter.
Comment 9 Erhard F. 2022-07-18 23:59:04 UTC
v5.19-rc7 still affected.
Comment 10 Erhard F. 2022-08-15 14:09:33 UTC
Created attachment 301573 [details]
kernel dmesg (kernel 6.0-rc1, AMD Ryzen 9 5950X)

No change with v6-0-rc1.
[...]
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -22!
[drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed in the dependencies handling -1431655766!
[...]

Additionally I get:
[...]
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 7 PID: 2120 at lib/refcount.c:28 refcount_warn_saturate+0x93/0xf0
Modules linked in: rfkill dm_crypt nhpoly1305_avx2 nhpoly1305 aes_generic aesni_intel libaes crypto_simd cryptd chacha_generic chacha_x86_64 libchacha adiantum libpoly1305 algif_skcipher joydev input_leds hid_generic usbhid hid ext4 mbcache crc16 jbd2 sr_mod amdgpu cdrom snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio dm_mod led_class mfd_core snd_hda_codec_hdmi drm_buddy r8169 gpu_sched evdev wmi_bmof drm_ttm_helper snd_hda_intel ttm snd_intel_dspcfg realtek i2c_algo_bit snd_hda_codec drm_display_helper snd_hwdep mdio_devres drm_kms_helper snd_hda_core sysimgblt syscopyarea snd_pcm sysfillrect libphy fb_sys_fops xhci_pci snd_timer ahci xhci_hcd snd libahci soundcore usbcore libata k10temp usb_common i2c_piix4 gpio_amdpt gpio_generic button pkcs8_key_parser nct6775 hwmon_vid nct6775_core wmi hwmon zram zsmalloc amd_pstate drm fuse drm_panel_orientation_quirks backlight configfs efivarfs
CPU: 7 PID: 2120 Comm: X:cs0 Not tainted 6.0.0-rc1-Zen3 #1
Hardware name: To Be Filled By O.E.M. B450M Steel Legend/B450M Steel Legend, BIOS P4.30 02/25/2022
RIP: 0010:refcount_warn_saturate+0x93/0xf0
Code: c7 c7 6d 4b e9 b2 e8 cc 13 bf ff 0f 0b c3 80 3d 5b fe da 00 00 75 af c6 05 52 fe da 00 01 48 c7 c7 ad 45 ea b2 e8 ad 13 bf ff <0f> 0b c3 80 3d 39 fe da 00 00 75 90 c6 05 30 fe da 00 01 48 c7 c7
RSP: 0018:ffffbc8ac1b7fb38 EFLAGS: 00010246
RAX: d8250f016f21c100 RBX: 0000000000000038 RCX: 0000000000000027
RDX: 00000000ffffbfff RSI: 0000000000000004 RDI: ffffa0db5ebd71c8
RBP: 0000000000000003 R08: 0000000000000000 R09: ffffa0db5e8a0000
R10: 0000000000000419 R11: 0000000000000000 R12: 00000000aaaaaaaa
R13: ffffa0d4f3e20000 R14: ffffa0d5a62ccc00 R15: 0000000000000003
FS:  00007f879006c640(0000) GS:ffffa0db5ebc0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563c67cfb000 CR3: 00000002c3938000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 amdgpu_cs_ioctl+0x498/0xdd0 [amdgpu]
 ? amdgpu_cs_report_moved_bytes+0x60/0x60 [amdgpu]
 drm_ioctl_kernel+0xdb/0x150 [drm]
 drm_ioctl+0x301/0x440 [drm]
 ? amdgpu_cs_report_moved_bytes+0x60/0x60 [amdgpu]
 amdgpu_drm_ioctl+0x42/0x80 [amdgpu]
 __se_sys_ioctl+0x72/0xc0
 do_syscall_64+0x6a/0x90
 ? do_user_addr_fault+0x2da/0x410
 ? exc_page_fault+0x5f/0x90
 entry_SYSCALL_64_after_hwframe+0x4b/0xb5
RIP: 0033:0x7f879b42496b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 77 1b 48 8b 44 24 18 64 48 2b 04 25 28 00
RSP: 002b:00007f879006b590 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000c0186444 RCX: 00007f879b42496b
RDX: 00007f879006b8a8 RSI: 00000000c0186444 RDI: 000000000000000d
RBP: 00007f879006b8e0 R08: 00007f879006b970 R09: 0000000000000003
R10: 0000560b4e0cdc40 R11: 0000000000000246 R12: 000000000000000d
R13: 0000560b4e175968 R14: 0000000000000000 R15: 00007f879006b8a8
 </TASK>
---[ end trace 0000000000000000 ]---
Comment 11 Erhard F. 2022-08-15 14:10:02 UTC
Created attachment 301574 [details]
kernel .config (kernel 6.0-rc1, AMD Ryzen 9 5950X)
Comment 12 Erhard F. 2022-08-27 13:46:19 UTC
Created attachment 301683 [details]
kernel .config (kernel 5.19.4, AMD Ryzen 9 5950X)
Comment 13 Erhard F. 2022-08-27 13:51:22 UTC
Interesting! Found out this is a gcc vs. clang issue.

Using a kernel built with the attached 5.19.4 config with clang-14.0.6 leads to the issue as described. Using a kernel built with the same config but with gcc-12.2.0 just works fine!

I'll close here as it's clear this is not strictly an AMD driver issue.
Comment 14 Michel Dänzer 2022-08-27 13:56:38 UTC
(In reply to Erhard F. from comment #13)
> I'll close here as it's clear this is not strictly an AMD driver issue.

Not really clear; there could be buggy amdgpu driver code, which happens not to result in noticeable issues in practice when compiled by GCC.
Comment 15 Erhard F. 2022-08-27 14:22:03 UTC
Agreed.

I'll keep it open and check the issue again on new 6.x stable kernel releases and when clang 15 becomes available.
Comment 16 Erhard F. 2022-11-14 22:58:32 UTC
Created attachment 303180 [details]
kernel dmesg (kernel 6.1-rc5, AMD Ryzen 9 5950X)

Reinvestigating on kernel 6.1-rc5 built with clang 15.0.3 + lld 15.0.3.

So far I was not able to reproduce the bug! X runs just fine for now.

I'll close here once 6.1 is stable and I can assure the bug does no longer show up on my other affected machines (AMD PRO A12-8830B, AMD PRO A10-8750B) too.
Comment 17 Erhard F. 2022-11-14 23:00:27 UTC
Created attachment 303181 [details]
kernel .config (kernel 6.1-rc5, AMD Ryzen 9 5950X)
Comment 18 Erhard F. 2023-02-16 23:21:46 UTC
I can confirm the bug is gone now on all my affected systems.

Kernels 6.1.x build & boot fine with GCC 12.2.1 and CLANG 15.0.7, no graphical corruption or dmesg errors to be seen.

Closing here.

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