<HTML><HEAD> <STYLE id=eMClientCss> blockquote.cite { margin-left: 5px; margin-right: 0px; padding-left: 10px; padding-right:0px; border-left: 1px solid #cccccc } blockquote.cite2 {margin-left: 5px; margin-right: 0px; padding-left: 10px; padding-right:0px; border-left: 1px solid #cccccc; margin-top: 3px; padding-top: 0px; } .plain pre, .plain tt { font-family: monospace; font-size: 100%; font-weight: normal; font-style: normal;} a img { border: 0px; }body {font-family: Tahoma;font-size: 12pt;} .plain pre, .plain tt {font-family: Tahoma;font-size: 12pt;}</STYLE> </HEAD> <BODY> <DIV>Hi everybody,</DIV> <DIV> </DIV> <DIV> I'm trying to setup a 27" screen on Fedora 23 (intel driver installer 1.4.0 Q4 2015) attached to an HDMI (ultrabook ASUS UX31A). I know it needs "reduced blank" and a timing of max 50Hz in order to work - with the max Bandwith on HDMI (at least that way it works on Windows using the same setup and "CustomResolution.exe") - But it dies not work so let me describe what I did so far: 1st guess)<PRE> "cvt -r 2560 1440 50" >> ERROR: Multiple of 60Hz refresh rate required for reduced blanking.</PRE> 2nd guess) Also The same seems to be true for "gtf"<PRE> "gtf 2560 1440 50" # 2560x1440 @ 50.00 Hz (GTF) hsync: 74.10 kHz; pclk: 256.09 MHz Modeline "2560x1440_50.00" 256.09 2560 2728 3008 3456 1440 1441 1444 1482 -HSync +Vsync</PRE> >>>> Does not work 3rd guess) A Modeline that I've found on the internet :<PRE>xrandr --newmode "2560x1440_50.00_rb" 200.25 2560 2608 2640 2720 1440 1443 1448 1474 +HSync -Vsync xrandr --addmode HDMI1 "2560x1440_50.00_rb" xrandr --output HDMI1 --mode "2560x1440_50.00_rb"</PRE> >>>> Does not work either => Results in:<PRE>Apr 23 15:30:39 schleppi-ultra.balg.lan /usr/libexec/gdm-x-session[2986]: (II) intel(0): resizing framebuffer to 5504x1440 Apr 23 15:30:39 schleppi-ultra.balg.lan /usr/libexec/gdm-x-session[2986]: (II) intel(0): switch to mode 2560x1440@49.9 on HDMI1 using pipe 0, position (0, 0), rotation normal, reflection n Apr 23 15:30:51 schleppi-ultra.balg.lan /usr/libexec/gdm-x-session[2986]: (II) intel(0): resizing framebuffer to 5504x1180 Apr 23 15:30:51 schleppi-ultra.balg.lan /usr/libexec/gdm-x-session[2986]: (II) intel(0): switch to mode 2048x1152@60.0 on HDMI1 using pipe 0, position (0, 0), rotation normal, reflection n Apr 23 15:30:51 schleppi-ultra.balg.lan kernel: [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B Apr 23 15:30:52 schleppi-ultra.balg.lan kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun </PRE> Last try) Read the modeline from "PowerStrip" from a running windows on the same machine that actually runs the wanted resolution:<PRE>xrandr --newmode "2560x1440" 200.002 2560 2608 2640 2720 1440 1443 1448 1474 -hsync -vsync </PRE> But this only switches to a black screen and causes the "pipe_off wait timed out" message in dmesg below... I've found the following two graphics related problems in the logs (dmesg) which might help as well:<PRE>[ 2.625304] ------------[ cut here ]------------ [ 2.625335] WARNING: CPU: 0 PID: 6 at drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b5/0x1c0 [drm]() [ 2.625335] vblank wait timed out on crtc 0 [ 2.625362] Modules linked in: i915 rtsx_usb_sdmmc mmc_core rtsx_usb hid_logitech_hidpp i2c_algo_bit drm_kms_helper drm serio_raw video fjes hid_logitech_dj [ 2.625368] CPU: 0 PID: 6 Comm: kworker/u8:0 Tainted: G U 4.4.7-300.fc23.x86_64 #1 [ 2.625370] Hardware name: ASUSTeK COMPUTER INC. UX31A/UX31A, BIOS UX31A.219 06/14/2013 [ 2.625380] Workqueue: events_unbound async_run_entry_fn [ 2.625385] 0000000000000286 00000000d003577f ffff88011a03f818 ffffffff813b5f8e [ 2.625389] ffff88011a03f860 ffffffffa007e772 ffff88011a03f850 ffffffff810a4122 [ 2.625392] ffff88003e677000 0000000000000000 0000000000000000 0000000000000006 [ 2.625394] Call Trace: [ 2.625405] [<ffffffff813b5f8e>] dump_stack+0x63/0x85 [ 2.625413] [<ffffffff810a4122>] warn_slowpath_common+0x82/0xc0 [ 2.625418] [<ffffffff810a41bc>] warn_slowpath_fmt+0x5c/0x80 [ 2.625426] [<ffffffff810e6023>] ? finish_wait+0x53/0x70 [ 2.625450] [<ffffffffa0052c15>] drm_wait_one_vblank+0x1b5/0x1c0 [drm] [ 2.625456] [<ffffffff810e62e0>] ? wake_atomic_t_function+0x70/0x70 [ 2.625552] [<ffffffffa01736d5>] intel_atomic_commit+0x475/0x1420 [i915] [ 2.625588] [<ffffffffa006b1be>] ? drm_atomic_check_only+0x18e/0x590 [drm] [ 2.625618] [<ffffffffa006b5f7>] drm_atomic_commit+0x37/0x60 [drm] [ 2.625634] [<ffffffffa00c409f>] restore_fbdev_mode+0x22f/0x260 [drm_kms_helper] [ 2.625649] [<ffffffffa00c6273>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper] [ 2.625660] [<ffffffffa00c62ed>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper] [ 2.625744] [<ffffffffa018a3ba>] intel_fbdev_set_par+0x1a/0x60 [i915] [ 2.625750] [<ffffffff81428050>] fbcon_init+0x570/0x5f0 [ 2.625755] [<ffffffff814a9aea>] visual_init+0xca/0x130 [ 2.625759] [<ffffffff814ab981>] do_bind_con_driver+0x1c1/0x3a0 [ 2.625764] [<ffffffff814abe99>] do_take_over_console+0x149/0x1a0 [ 2.625769] [<ffffffff81423eb7>] do_fbcon_takeover+0x57/0xb0 [ 2.625773] [<ffffffff81428ac8>] fbcon_event_notify+0x658/0x750 [ 2.625778] [<ffffffff810c355a>] notifier_call_chain+0x4a/0x70 [ 2.625783] [<ffffffff810c3897>] __blocking_notifier_call_chain+0x47/0x60 [ 2.625787] [<ffffffff810c38c6>] blocking_notifier_call_chain+0x16/0x20 [ 2.625792] [<ffffffff8142e71b>] fb_notifier_call_chain+0x1b/0x20 [ 2.625798] [<ffffffff81430a3f>] register_framebuffer+0x20f/0x350 [ 2.625812] [<ffffffffa00c659a>] drm_fb_helper_initial_config+0x28a/0x410 [drm_kms_helper] [ 2.625889] [<ffffffffa018aebb>] intel_fbdev_initial_config+0x1b/0x20 [i915] [ 2.625894] [<ffffffff810c4fca>] async_run_entry_fn+0x4a/0x140 [ 2.625900] [<ffffffff810bc5c6>] process_one_work+0x156/0x430 [ 2.625904] [<ffffffff810bc8ee>] worker_thread+0x4e/0x450 [ 2.625909] [<ffffffff810bc8a0>] ? process_one_work+0x430/0x430 [ 2.625912] [<ffffffff810c2678>] kthread+0xd8/0xf0 [ 2.625916] [<ffffffff810c25a0>] ? kthread_worker_fn+0x160/0x160 [ 2.625921] [<ffffffff817a144f>] ret_from_fork+0x3f/0x70 [ 2.625925] [<ffffffff810c25a0>] ? kthread_worker_fn+0x160/0x160 [ 2.625928] ---[ end trace cec8cc6321f01362 ]--- </PRE> 2) And this one as well: <PRE>[ 13.375747] ------------[ cut here ]------------ [ 13.375827] WARNING: CPU: 3 PID: 1894 at drivers/gpu/drm/i915/intel_display.c:1144 intel_disable_pipe+0x2b6/0x2c0 [i915]() [ 13.375831] pipe_off wait timed out [ 13.375834] Modules linked in: cmac fuse xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables evdi(OE) uhid bnep rtsx_usb_ms memstick arc4 intel_rapl iosf_mbi x86_pkg_temp_thermal coretemp kvm_intel btusb iTCO_wdt asus_nb_wmi kvm iTCO_vendor_support asus_wmi sparse_keymap btrtl btbcm btintel bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core irqbypass v4l2_common crct10dif_pclmul iwlmvm crc32_pclmul vfat fat snd_hda_codec_hdmi videodev mac80211 crc32c_intel snd_hda_codec_realtek snd_hda_codec_generic media snd_hda_intel iwlwifi snd_hda_codec cfg80211 snd_hda_core snd_hwdep snd_seq joydev snd_seq_device [ 13.375920] snd_pcm i2c_i801 lpc_ich rfkill wmi int3403_thermal acpi_als mei_me kfifo_buf industrialio snd_timer int3402_thermal mei int3400_thermal int340x_thermal_zone acpi_thermal_rel snd tpm_tis shpchp soundcore tpm nfsd binfmt_misc nfs_acl lockd auth_rpcgss grace sunrpc i915 rtsx_usb_sdmmc mmc_core rtsx_usb hid_logitech_hidpp i2c_algo_bit drm_kms_helper drm serio_raw video fjes hid_logitech_dj [ 13.375971] CPU: 3 PID: 1894 Comm: gnome-shell Tainted: G U W OE 4.4.7-300.fc23.x86_64 #1 [ 13.375975] Hardware name: ASUSTeK COMPUTER INC. UX31A/UX31A, BIOS UX31A.219 06/14/2013 [ 13.375979] 0000000000200286 00000000827c27d7 ffff880115447a78 ffffffff813b5f8e [ 13.375985] ffff880115447ac0 ffffffffa01d6de8 ffff880115447ab0 ffffffff810a4122 [ 13.375991] ffff88003d940000 0000000000070008 00000000fffb9ff6 0000000000070008 [ 13.375996] Call Trace: [ 13.376011] [<ffffffff813b5f8e>] dump_stack+0x63/0x85 [ 13.376021] [<ffffffff810a4122>] warn_slowpath_common+0x82/0xc0 [ 13.376027] [<ffffffff810a41bc>] warn_slowpath_fmt+0x5c/0x80 [ 13.376086] [<ffffffffa016a446>] intel_disable_pipe+0x2b6/0x2c0 [i915] [ 13.376137] [<ffffffffa016a7fc>] ironlake_crtc_disable+0x8c/0x7c0 [i915] [ 13.376182] [<ffffffffa0166adc>] ? intel_crtc_disable_planes+0xdc/0xf0 [i915] [ 13.376231] [<ffffffffa0173387>] intel_atomic_commit+0x127/0x1420 [i915] [ 13.376283] [<ffffffffa006b1be>] ? drm_atomic_check_only+0x18e/0x590 [drm] [ 13.376320] [<ffffffffa006acbd>] ? drm_atomic_set_mode_prop_for_crtc+0x2d/0x110 [drm] [ 13.376350] [<ffffffffa006b5f7>] drm_atomic_commit+0x37/0x60 [drm] [ 13.376373] [<ffffffffa00c34c6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] [ 13.376405] [<ffffffffa005ab62>] drm_mode_set_config_internal+0x62/0x100 [drm] [ 13.376434] [<ffffffffa005eee2>] drm_mode_setcrtc+0x3d2/0x4f0 [drm] [ 13.376457] [<ffffffffa0050602>] drm_ioctl+0x152/0x540 [drm] [ 13.376485] [<ffffffffa005eb10>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] [ 13.376494] [<ffffffff813407fc>] ? selinux_file_ioctl+0x10c/0x1c0 [ 13.376503] [<ffffffff81241428>] do_vfs_ioctl+0x298/0x480 [ 13.376510] [<ffffffff8122ff5e>] ? ____fput+0xe/0x10 [ 13.376518] [<ffffffff813380b3>] ? security_file_ioctl+0x43/0x60 [ 13.376524] [<ffffffff81241689>] SyS_ioctl+0x79/0x90 [ 13.376533] [<ffffffff817a10ee>] entry_SYSCALL_64_fastpath+0x12/0x71 [ 13.376592] ---[ end trace cec8cc6321f01363 ]--- </PRE> I've tried this using Wayland and Classic X as well ... Any hints on how to get this thing up and running with this stuff - attached Display is a DELL U2715H ?? - Any more helpful information needed ? lspci -kvnn 00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Zenbook Prime UX31A [1043:1517] Flags: bus master, fast devsel, latency 0, IRQ 28 Memory at f7800000 (64-bit, non-prefetchable) [size=4M] Memory at e0000000 (64-bit, prefetchable) [size=256M] I/O ports at f000 [size=64] Expansion ROM at <unassigned> [disabled] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities: [a4] PCI Advanced Features Kernel driver in use: i915 Kernel modules: i915 <PRE>modinfo i915 filename: /lib/modules/4.4.7-300.fc23.x86_64/kernel/drivers/gpu/drm/i915/i915.ko.xz license: GPL and additional rights description: Intel Graphics author: Intel Corporation author: Tungsten Graphics, Inc. firmware: i915/bxt_dmc_ver1.bin firmware: i915/skl_dmc_ver1.bin firmware: i915/skl_guc_ver4.bin Hoping to see any more hints that I did not think about so far ...</PRE><PRE>Cheers..</PRE><PRE>Andreas</PRE></DIV></BODY></HTML>