Devuan and Dell D630 graphics issue
On one of my Dell D630s running Devuan GNU/Linux, I ran into an interesting issue. It does not occur on my other D630, so there's hope. Originally I actually changed from my i686 installation of Devuan ascii to the x86_64 version, but the problem still persistent. After a few minutes of dedicated searching, I found the answer!
tl;dr
Put on the kernel line:
video=SVIDEO-1:d
Normally in /etc/default/grub:
GRUB_CMDLINE_LINUX_DEFAULT="quiet video=SVIDEO-1:d"
And then you have to run:
grub-mkconfig -o /boot/grub/grub.cfg
Explanation
The symptom of my problem occurs when changing screen resolutions in X11, or switching to or from the X11 display to a different tty. The mouse responds and moves around the (graphical) screens, but nothing else is updated for about 10 seconds. I investigated dmesg, and it shows the very interesting results at the bottom of the post. After shortening the snippet to paste into Internet search engines, I finally found an answer! This bug has something to do with handling the svideo output. Disabling the svideo output (my Dell Latitude D630 does not even have one!) makes the issue go away.
[ 168.672218] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:29:pipe B] flip_done timed out
[ 168.776236] ------------[ cut here ]------------
[ 168.776296] WARNING: CPU: 1 PID: 2274 at /build/linux-6WgLIg/linux-4.9.88/drivers/gpu/drm/drm_irq.c:1254 drm_wait_one_vblank+0x197/0x1a0 [drm]
[ 168.776299] vblank wait timed out on crtc 1
[ 168.776302] Modules linked in: appletalk ax25 ipx p8023 p8022 psnap llc bnep bluetooth rpcsec_gss_krb5 nfsv4 dns_resolver nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace fscache sunrpc parport_pc ppdev lp parport iTCO_wdt iTCO_vendor_support b43 bcma snd_hda_codec_idt snd_hda_codec_generic mac80211 snd_hda_intel snd_hda_codec cfg80211 coretemp snd_hda_core dell_wmi kvm_intel sparse_keymap dell_rbtn rng_core dell_laptop kvm snd_hwdep yenta_socket snd_pcm dell_smbios rfkill snd_timer snd dcdbas dell_smm_hwmon irqbypass soundcore lpc_ich pcmcia_rsrc i915 mfd_core joydev pcspkr evdev serio_raw drm_kms_helper shpchp battery video wmi button ac drm i2c_algo_bit acpi_cpufreq ext4 crc16 jbd2 crc32c_generic fscrypto ecb glue_helper lrw gf128mul ablk_helper cryptd aes_x86_64 mbcache dm_mod sr_mod cdrom
[ 168.776470] sg sd_mod hid_generic ata_generic usbhid hid psmouse firewire_ohci ata_piix i2c_i801 ssb i2c_smbus mmc_core pcmcia firewire_core crc_itu_t pcmcia_core libata tg3 ptp pps_core libphy scsi_mod thermal ehci_pci uhci_hcd ehci_hcd usbcore usb_common
[ 168.776532] CPU: 1 PID: 2274 Comm: Xorg Tainted: G W 4.9.0-6-amd64 #1 Debian 4.9.88-1+deb9u1
[ 168.776535] Hardware name: Dell Inc. Latitude D630 /0KU184, BIOS A08 02/28/2008
[ 168.776540] 0000000000000000 ffffffff9312f774 ffffb93e40b1f980 0000000000000000
[ 168.776551] ffffffff92e78a5e ffff9dc735860000 ffffb93e40b1f9d8 0000000000000000
[ 168.776559] 0000000007000df1 ffff9dc77bc8a898 ffff9dc736bf2800 ffffffff92e78adf
[ 168.776568] Call Trace:
[ 168.776582] [] ? dump_stack+0x5c/0x78
[ 168.776591] [] ? __warn+0xbe/0xe0
[ 168.776597] [] ? warn_slowpath_fmt+0x5f/0x80
[ 168.776604] [] ? finish_wait+0x3c/0x70
[ 168.776642] [] ? drm_wait_one_vblank+0x197/0x1a0 [drm]
[ 168.776648] [] ? prepare_to_wait_event+0xf0/0xf0
[ 168.776733] [] ? intel_get_load_detect_pipe+0x624/0x640 [i915]
[ 168.776799] [] ? intel_tv_detect+0x15a/0x590 [i915]
[ 168.776828] [] ? drm_helper_probe_single_connector_modes+0x432/0x520 [drm_kms_helper]
[ 168.776866] [] ? drm_mode_object_get_properties+0xd7/0x100 [drm]
[ 168.776904] [] ? drm_mode_getconnector+0x32a/0x360 [drm]
[ 168.776938] [] ? drm_ioctl+0x1ed/0x470 [drm]
[ 168.776975] [] ? drm_mode_connector_property_set_ioctl+0x60/0x60 [drm]
[ 168.776984] [] ? __fpu__restore_sig+0x7b/0x580
[ 168.776992] [] ? do_vfs_ioctl+0xa2/0x620
[ 168.776997] [] ? SyS_ioctl+0x74/0x80
[ 168.777004] [] ? do_syscall_64+0x8d/0xf0
[ 168.777011] [] ? entry_SYSCALL_64_after_swapgs+0x58/0xc6
[ 168.777016] ---[ end trace 8f754217765c1d43 ]---
[ 168.921006] ------------[ cut here ]------------
References
Weblinks
Searches
https://duckduckgo.com/?q=g!+drm_irq.c%3A1254+drm_wait_one_vblank%2B0x197%2F0x1a0&ia=web
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