radeon is crashing and logging [drm:radeon_crtc_page_flip_target [radeon]] *ERROR* failed to pin new rbo buffer before flip

symptom:
   -terminal stutters when scrolling
   -problems occurs randomly(1:4) when booting

# lsb_release -rd
Description: Ubuntu 20.04.6 LTS
Release: 20.04

Fix:
# service lightdm stop
# service lightdm start
   -"service restart" will not fix it ie. errors keep coming

dmesg:
radeon 0000:01:05.0: 00000000b42b74bd pin failed
[ 391.887939] [drm:radeon_crtc_page_flip_target [radeon]] *ERROR* failed to pin new rbo buffer before flip
[ 392.061046] radeon 0000:01:05.0: 00000000b42b74bd pin failed
[ 392.061069] [drm:radeon_crtc_page_flip_target [radeon]] *ERROR* failed to pin new rbo buffer before flip
[ 392.117842] radeon 0000:01:05.0: 00000000b42b74bd pin failed
[ 392.117874] [drm:radeon_crtc_page_flip_target [radeon]] *ERROR* failed to pin new rbo buffer before flip

After "Fix", this is found on dmesg:
  437.202768] ------------[ cut here ]------------
[ 437.202781] WARNING: CPU: 0 PID: 1525 at drivers/gpu/drm/ttm/ttm_bo.c:409 ttm_bo_release+0x304/0x330 [ttm]
[ 437.202809] Modules linked in: snd_seq_dummy vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi ledtrig_audio snd_hda_intel snd_seq_midi snd_seq_midi_event snd_intel_dspcfg binfmt_misc snd_rawmidi edac_mce_amd snd_intel_sdw_acpi snd_hda_codec kvm_amd snd_hda_core ccp snd_seq snd_hwdep kvm snd_pcm wmi_bmof snd_seq_device input_leds serio_raw k10temp snd_timer snd soundcore mac_hid sch_fq_codel cuse vmwgfx w83627ehf hwmon_vid msr nfsd auth_rpcgss parport_pc nfs_acl ppdev lockd lp grace parport ramoops reed_solomon pstore_blk sunrpc pstore_zone efi_pstore ip_tables x_tables autofs4 btrfs blake2b_generic xor zstd_compress raid6_pq libcrc32c pata_acpi hid_generic radeon nouveau usbhid mxm_wmi i2c_algo_bit drm_ttm_helper ttm pata_atiixp drm_kms_helper syscopyarea i2c_piix4 sysfillrect sysimgblt fb_sys_fops ahci cec r8169 rc_core video hid drm realtek libahci wmi
[ 437.202901] CPU: 0 PID: 1525 Comm: Xorg Tainted: G OE 5.15.0-72-generic #79~20.04.1-Ubuntu
[ 437.202906] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./A780LM-S, BIOS P1.30 05/07/2010
[ 437.202909] RIP: 0010:ttm_bo_release+0x304/0x330 [ttm]
[ 437.202920] Code: 8d b3 b8 fe ff ff e8 7b 3f e1 ff 48 8b 73 08 4c 89 e7 e8 5f 29 00 00 48 8b 7b 98 e9 4e fd ff ff e8 e1 46 07 e6 e9 7f fd ff ff <0f> 0b e9 20 fd ff ff e8 10 3f 07 e6 e9 f2 fe ff ff be 03 00 00 00
[ 437.202923] RSP: 0018:ffffba4a4055bc68 EFLAGS: 00010202
[ 437.202927] RAX: 0000000000000001 RBX: ffff91b4a67229d8 RCX: 0000000000000000
[ 437.202930] RDX: 0000000000000001 RSI: ffff91b4a5d2edb8 RDI: ffff91b4a67229d8
[ 437.202932] RBP: ffffba4a4055bc90 R08: ffff91b4a67229d8 R09: 0000000000000064
[ 437.202934] R10: 0000000000000010 R11: ffff91b49b8a2c10 R12: ffff91b5597946f0
[ 437.202937] R13: ffff91b49abdce98 R14: ffff91b4a6722878 R15: ffff91b49abdce40
[ 437.202939] FS: 00007fd045224a40(0000) GS:ffff91b56fc00000(0000) knlGS:0000000000000000
[ 437.202942] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 437.202944] CR2: 0000564569e509d0 CR3: 0000000053ed0000 CR4: 00000000000006f0
[ 437.202948] Call Trace:
[ 437.202951] <TASK>
[ 437.202957] ttm_bo_put+0x34/0x50 [ttm]
[ 437.202966] radeon_bo_unref+0x1e/0x30 [radeon]
[ 437.203072] radeon_gem_object_free+0x34/0x50 [radeon]
[ 437.203124] drm_gem_object_free+0x1d/0x30 [drm]
[ 437.203204] drm_gem_dmabuf_release+0x42/0x60 [drm]
[ 437.203244] dma_buf_release+0x46/0xa0
[ 437.203252] __dentry_kill+0x102/0x180
[ 437.203257] dput+0x1cc/0x320
[ 437.203260] __fput+0xf4/0x280
[ 437.203265] ____fput+0xe/0x20
[ 437.203268] task_work_run+0x70/0xb0
[ 437.203272] do_exit+0x363/0xad0
[ 437.203276] do_group_exit+0x43/0xb0
[ 437.203279] __x64_sys_exit_group+0x18/0x20
[ 437.203283] do_syscall_64+0x5c/0xc0
[ 437.203289] ? exit_to_user_mode_prepare+0x3d/0x1c0
[ 437.203294] ? do_user_addr_fault+0x1e0/0x660
[ 437.203298] ? irqentry_exit_to_user_mode+0x9/0x20
[ 437.203302] ? irqentry_exit+0x1d/0x30
[ 437.203304] ? exc_page_fault+0x89/0x170
[ 437.203308] entry_SYSCALL_64_after_hwframe+0x61/0xcb
[ 437.203312] RIP: 0033:0x7fd045550146
[ 437.203316] Code: Unable to access opcode bytes at RIP 0x7fd04555011c.
[ 437.203317] RSP: 002b:00007ffcae6144d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[ 437.203320] RAX: ffffffffffffffda RBX: 00007fd0456558a0 RCX: 00007fd045550146
[ 437.203323] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[ 437.203325] RBP: 0000000000000000 R08: 00000000000000e7 R09: fffffffffffffc80
[ 437.203327] R10: 00007fd04600bd80 R11: 0000000000000246 R12: 00007fd0456558a0
[ 437.203329] R13: 00000000000008c2 R14: 00007fd04565e2e8 R15: 0000000000000000
[ 437.203333] </TASK>
[ 437.203335] ---[ end trace 2d2d7974cecbb8fc ]---

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.15.0-72.79~20.04.1-generic 5.15.98
Uname: Linux 5.15.0-72-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.26
Architecture: amd64
BootLog: Error: [Errno 13] Lupa evätty: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: MATE
Date: Mon May 29 18:42:24 2023
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 6.1.38, 5.15.0-71-generic, x86_64: installed
 virtualbox, 6.1.38, 5.15.0-72-generic, x86_64: installed
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] RS780L [Radeon 3000] [1002:9616] (prog-if 00 [VGA controller])
   Subsystem: ASRock Incorporation RS780L [Radeon 3000] [1849:9616]
 NVIDIA Corporation GT218 [GeForce 310] [10de:0a63] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: NVIDIA Corporation GT218 [GeForce 310] [10de:0733]
InstallationDate: Installed on 2022-03-25 (430 days ago)
InstallationMedia: Ubuntu-MATE 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819.1)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.15.0-72-generic root=UUID=f6d633a6-5f94-43dd-87ff-8fe339d4895e ro rootflags=subvol=@ tsc=nowatchdog quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/07/2010
dmi.bios.release: 8.15
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.30
dmi.board.name: A780LM-S
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.30:bd05/07/2010:br8.15:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnA780LM-S:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:skuToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.107-8ubuntu1~20.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 21.2.6-0ubuntu0.1~20.04.2
version.libgl1-mesa-glx: libgl1-mesa-glx 21.2.6-0ubuntu0.1~20.04.2
version.xserver-xorg-core: xserver-xorg-core 2:1.20.13-1ubuntu1~20.04.8
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1