Blank screen after boot with Radeon HD 5450
Hi, After the installation of a VisionTek Radeon 5450 graphics card my machine gives a blank screen after booting. It still shows the normal system messages (full dmesg below), with the last visible one being "scsibus4 at softraid0: 256 targets". Then the monitor (connected via DisplayPort) goes into power save mode. This is on OpenBSD 6.1 and amd64. The machine is up and I can ssh into it. When booting with 'boot -c' and 'disable radeondrm' the problem doesn't occur, but of course then graphics acceleration is lost. Also, when booting another OS from a USB stick the display is functioning at 2560x1440@60Hz. xenodm is disabled. Just in case this provides useful information below is also an Xorg.0.log when it is enabled (the display remains blank). Thanks for any insights or hints. Max $ fw_update -i Installed: vmm-firmware-1.10.2p2 radeondrm-firmware-20150927 iwm-firmware-0.20161101 Installed, extra: malo-firmware-1.4p4 rsu-firmware-1.2p0 acx-firmware-1.4p5 rtwn-firmware-1.0 athn-firmware-1.1p1 upgt-firmware-1.1p4 wpi-firmware-3.2p1 uvideo-firmware-1.2p2 iwn-firmware-5.11p1 urtwn-firmware-1.2 bwi-firmware-1.4p4 uath-firmware-2.0p1 pgt-firmware-1.2p4 iwi-firmware-3.1p2 otus-firmware-1.0p1 ipw-firmware-1.3p2 $ dmesg OpenBSD 6.1 (GENERIC.MP) #20: Sat Apr 1 13:45:56 MDT 2017 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 17126002688 (16332MB) avail mem = 16602288128 (15833MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 3.0 @ 0x8fb1 (30 entries) bios0: vendor American Megatrends Inc. version "P1.20" date 12/16/2016 bios0: ASRock Z270 Gaming-ITX/ac acpi0 at bios0: rev 2 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP APIC FPDT MCFG SSDT FIDT SSDT SSDT HPET SSDT UEFI SSDT AAFT LPIT WSMT DBGP DBG2 DMAR ASF! acpi0: wakeup devices PEGP(S4) PEG0(S4) PEGP(S4) PEG1(S4) PEGP(S4) PEG2(S4) PXSX(S4) RP09(S4) PXSX(S4) RP10(S4) PXSX(S4) RP11(S4) PXSX(S4) RP12(S4) PXSX(S4) RP13(S4) [...] acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee0: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz, 4200.00 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT cpu0: 256KB 64b/line 8-way L2 cache cpu0: TSC frequency 42 Hz cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 23MHz cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1, IBE cpu1 at mainbus0: apid 2 (application processor) cpu1: Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz, 4200.00 MHz cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT cpu1: 256KB 64b/line 8-way L2 cache cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 4 (application processor) cpu2: Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz, 4200.00 MHz cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT cpu2: 256KB 64b/line 8-way L2 cache cpu2: smt 0, core 2, package 0 cpu3 at mainbus0: apid 6 (application processor) cpu3: Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz, 4200.00 MHz cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SENSOR,ARAT cpu3: 256KB 64b/line 8-way L2 cache cpu3: smt 0, core 3, package 0 cpu4 at mainbus0: apid 1 (application processor) cpu4: Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz, 4200.00 MHz cpu4: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,
Re: Blank screen after boot with Radeon HD 5450
On Sun, 28 May 2017 15:37:08 -0400 Maximilian Pichler wrote: > After the installation of a VisionTek Radeon 5450 graphics card my > machine gives a blank screen after booting. It still shows the normal > system messages (full dmesg below), with the last visible one being > "scsibus4 at softraid0: 256 targets". Then the monitor (connected via > DisplayPort) goes into power save mode. This is on OpenBSD 6.1 and > amd64. Have you tried booting more than once? I've had this problem on a Radeon HD 6850 after a fresh install in the past, and after a reboot it worked. I suspect the cause was that fw_update ran too late for the firmware to load correctly (and I no longer have access to that hardware to test).
Re: Blank screen after boot with Radeon HD 5450
Re-reading your mail, it sounds like you installed the card into an existing system. In that case, my question becomes "have you run fw_update?"
Re: Blank screen after boot with Radeon HD 5450
On Sun, 28 May 2017 22:54:22 +0200 Steven McDonald wrote: > Re-reading your mail, it sounds like you installed the card into an > existing system. In that case, my question becomes "have you run > fw_update?" Just noticed the part of your mail where you showed you had the firmware installed. Sorry for the noise, brain must be in slow motion tonight.
Re: Blank screen after boot with Radeon HD 5450
On 05/28/17 22:50, Steven McDonald wrote: On Sun, 28 May 2017 15:37:08 -0400 Maximilian Pichler wrote: After the installation of a VisionTek Radeon 5450 graphics card my machine gives a blank screen after booting. It still shows the normal system messages (full dmesg below), with the last visible one being "scsibus4 at softraid0: 256 targets". Then the monitor (connected via DisplayPort) goes into power save mode. This is on OpenBSD 6.1 and amd64. Have you tried booting more than once? I've had this problem on a Radeon HD 6850 after a fresh install in the past, and after a reboot > it worked. I suspect the cause was that fw_update ran too late for the firmware to load correctly (and I no longer have access to that hardware to test). I see this every time after a fresh install on a Radeon HD 6450, too. Login and reboot (as with eyes shut) has always been successful. By the way, recently, I had a nice effect: I forgot to attach the monitor cable before boot, hence the usual 1600x1200 resolution was not detected, and the standard 1024x768 mode was chosen. After connecting the monitor cable, as a result I got the neat SunOS console font based on the lower resolution (getting back the full resolution in the consecutive startx session). I like it very much, since it was better readable and not that tiny. Is there a way to choose lower resolutions for radeondrm console using some suitable configuration file? With best regards, Jens
Re: Blank screen after boot with Radeon HD 5450
On Sun, May 28, 2017 at 4:50 PM, Steven McDonald wrote: > Have you tried booting more than once? Yes, many times, both warm and cold.
Re: Blank screen after boot with Radeon HD 5450
I tried your suggestion of logging in with the keyboard while the screen is blank and then typing "startx". Then logged in via ssh: $ DISPLAY=:0 xrandr Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192 DisplayPort-0 disconnected primary (normal left inverted right x axis y axis) DVI-0 disconnected (normal left inverted right x axis y axis) VGA-0 disconnected (normal left inverted right x axis y axis) The DisplayPort cable is connected. Still it seems that the problem is not with X, as it occurs even with it is disabled.
Re: Blank screen after boot with Radeon HD 5450
"Jens A. Griepentrog" writes: > Is there a way to choose lower resolutions for radeondrm console using > some suitable configuration file? I asked basically this question some weeks ago, and lack of any answer and not finding anything about this in man pages or FAQ has me to belive that for now the answer is no, it's not configurable. http://marc.info/?l=openbsd-misc&m=149185776506814&w=2 Allan
Re: Blank screen after boot with Radeon HD 5450
Apologies, I have to revise the results from my previous message (by accident I had the cable connected to the onboard video). In fact xrandr does detect the DisplayPort connection: $ DISPLAY=:0 xrandr Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 8192 x 8192 DisplayPort-0 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 553mm x 311mm 2560x1440 59.95*+ 2048x1152 60.00 1920x1200 59.88 1920x1080 60.0050.0059.9430.0025.0024.00 29.9723.98 1920x1080i60.0050.0059.94 1600x1200 60.00 1680x1050 59.95 1280x1024 75.0260.02 1200x960 59.99 1152x864 75.00 1280x720 60.0050.0059.94 1440x576i 50.00 1024x768 75.0860.00 1440x480i 60.0059.94 800x600 75.0060.32 720x576 50.00 720x480 60.0059.94 640x480 75.0060.0059.94 720x400 70.08 DVI-0 disconnected (normal left inverted right x axis y axis) VGA-0 disconnected (normal left inverted right x axis y axis) However, the screen remains blank. Changing the resolution doesn't help either: $ DISPLAY=:0 xrandr --output DisplayPort-0 --mode 1280x720 (screen remains blank) On Sun, May 28, 2017 at 8:02 PM, Maximilian Pichler wrote: > I tried your suggestion of logging in with the keyboard while the > screen is blank and then typing "startx". Then logged in via ssh: > $ DISPLAY=:0 xrandr > Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192 > DisplayPort-0 disconnected primary (normal left inverted right x axis y axis) > DVI-0 disconnected (normal left inverted right x axis y axis) > VGA-0 disconnected (normal left inverted right x axis y axis) > > The DisplayPort cable is connected. > > Still it seems that the problem is not with X, as it occurs even with > it is disabled.
Re: Blank screen after boot with Radeon HD 5450
Maximilian Pichler writes: >2560x1440 59.95*+ >2048x1152 60.00 >1920x1200 59.88 >1920x1080 60.0050.0059.9430.0025.0024.00 [...] Try connecting a lower-resolution monitor and see if it works, if you have one. I have found that my dual 2560x1440 monitors, connected with DVI->HDMI cables, are not capable of 2560x1440 I believe this is due to limits of DVI. However the monitor and/or the card does not realize this and reports 2560x1440 60Hz as the "preferred" mode. I have a ATI Radeon HD 5870 card. If I connect one monitor with an HDMI cable I can see the console. With two monitors connected with DVI->HDMI I do not. I have to do a "blind" login then run "startx" and all is well. Allan
Re: Blank screen after boot with Radeon HD 5450
As mentioned, I booted another OS from a USB stick and it runs at 2560x1440@60MHz. Doesn't this make it unlikely that the issue is with the monitor or cable? Also, the connection is via DisplayPort, even the most basic version of which shouldn't struggle with this resolution. Is there not a more systematic way of debugging this? I find it puzzling that none of the logs contains any error message. On Tue, May 30, 2017 at 9:42 AM, Allan Streib wrote: > Maximilian Pichler writes: > >>2560x1440 59.95*+ >>2048x1152 60.00 >>1920x1200 59.88 >>1920x1080 60.0050.0059.9430.0025.0024.00 > > [...] > > Try connecting a lower-resolution monitor and see if it works, if you > have one. > > I have found that my dual 2560x1440 monitors, connected with DVI->HDMI > cables, are not capable of 2560x1440 I believe this is due to limits of > DVI. However the monitor and/or the card does not realize this and > reports 2560x1440 60Hz as the "preferred" mode. > > I have a ATI Radeon HD 5870 card. > > If I connect one monitor with an HDMI cable I can see the console. With > two monitors connected with DVI->HDMI I do not. I have to do a "blind" > login then run "startx" and all is well. > > Allan > >
Re: Blank screen after boot with Radeon HD 5450
> Is there not a more systematic way of debugging this? IT is, but it may be different than your method. > I find it puzzling that none of the logs contains any error message. I find it puzzling asking about a problem on a list and not following any of the advices and report back. I will find it more puzzling if someone will give you a solution. Bye.
Re: Blank screen after boot with Radeon HD 5450
I would certainly have followed Allan's advice, but only own one monitor. Apologies for having failed to mention this.
Re: Blank screen after boot with Radeon HD 5450
On Tue, May 30, 2017 at 12:22:09PM -0400, Maximilian Pichler wrote: As mentioned, I booted another OS from a USB stick and it runs at 2560x1440@60MHz. Doesn't this make it unlikely that the issue is with the monitor or cable? Also, the connection is via DisplayPort, even the most basic version of which shouldn't struggle with this resolution. Is there not a more systematic way of debugging this? I find it puzzling that none of the logs contains any error message. Just a thought -- maybe it's because there is no error ??? man xbacklight(1)
Re: Blank screen after boot with Radeon HD 5450
On Tue, May 30, 2017 at 2:15 PM, wrote: > Just a thought -- maybe it's because there is no error ??? > > man xbacklight(1) $ xbacklight No outputs have backlight property The monitor is not just dark, but it says "no signal" and goes into power save mode.
Re: Blank screen after boot with Radeon HD 5450
> (by accident I had the cable connected to the onboard video) I recall I tried once a dual monitor setup using an onboard graphics + another plugged in card. I don't remember exactly, but I think the boot message was shown one the onboard graphic card only or on both monitors. I was concerned about this behaviour then I got over it since in X all was ok. Did you disable the onboard card from BIOS? What options do you have for this?
Re: Blank screen after boot with Radeon HD 5450
On Tue, May 30, 2017 at 2:55 PM, Mihai Popescu wrote: > Did you disable the onboard card from BIOS? What options do you have for this? In the BIOS, "Primary Graphics Adapter" is set to "PCI Express". When switching it to "Onboard" and plugging the cable into the onboard DP, the boot message and the BIOS setup are shown and the display functions at 2560x1440@60Hz. When the setting is "PCI Express" the OpenBSD boot messages are displayed through the PCI adapter (only). A brief moment after the "scsibus4 at softraid0: 256 targets" there is no signal anymore, neither on the PCI adapter nor the on-board one. (This happens no matter whether xenodm is on or off.)
Re: Blank screen after boot with Radeon HD 5450
What is the output of xrandr plain command, without any parameters? Do not use display numbers or anything else, type it like this 'xrandr' using a ssh connection on the non working configuration.
Re: Blank screen after boot with Radeon HD 5450
Without parameters, via ssh: $ xrandr Can't open display $ echo [$DISPLAY] [] This is after logging in and typing startx on the keyboard, with a blank monitor. I've also tried launching startx via ssh, with the same result. On Tue, May 30, 2017 at 5:08 PM, Mihai Popescu wrote: > What is the output of xrandr plain command, without any parameters? Do > not use display numbers or anything else, type it like this 'xrandr' > using a ssh connection on the non working configuration. >
Re: Blank screen after boot with Radeon HD 5450
xrandr over ssh? even if you run it with -X it will display something from the machine running the ssh client (and the local X server) not the ssh server one :s -l On Tue, May 30, 2017 at 3:08 PM, Mihai Popescu wrote: > What is the output of xrandr plain command, without any parameters? Do > not use display numbers or anything else, type it like this 'xrandr' > using a ssh connection on the non working configuration. > >
Re: Blank screen after boot with Radeon HD 5450
On Wed, May 31, 2017 at 1:02 AM, Luis Coronado wrote: > xrandr over ssh? even if you run it with -X it will display something from > the machine running the ssh client (and the local X server) not the ssh > server one :s > > -l > > On Tue, May 30, 2017 at 3:08 PM, Mihai Popescu wrote: >> >> What is the output of xrandr plain command, without any parameters? Do >> not use display numbers or anything else, type it like this 'xrandr' >> using a ssh connection on the non working configuration. >> > It looks like xrandr reports are not helpful. I think you shoudl enable the onboard card, find a second monitor from a friend and try to boot with both monitor connected. Then you can debug.
Re: Blank screen after boot with Radeon HD 5450
Just tried another graphics card (VisionTek Radeon HD 6350), with identical results: the boot messages are shown, then the signal is lost.
Re: Blank screen after boot with Radeon HD 5450
Maximilian Pichler writes: > Just tried another graphics card (VisionTek Radeon HD 6350), with > identical results: the boot messages are shown, then the signal is > lost. > I think you should try another monitor if at all possible. Perhaps your monitor just goes into power-save mode with an incompatible signal. On mine, it pops up a message that asks me to set my video card to "2560 x 1140 60Hz" which, according to the dmesg, it should already be: radeondrm0: 2560x1440 My xrandr shows the 2560x1440 mode at 59.95Hz, I'm assuming that's close enough to 60Hz that it should work? Or could that be the problem? The highest I can get working is 2048x1152. Screen 0: minimum 320 x 200, current 4096 x 1152, maximum 8192 x 8192 DVI-0 connected primary 2048x1152+0+0 (normal left inverted right x axis y axis) 553mm x 311mm 2560x1440 59.95 + 2048x1152 60.00* 1920x1200 59.95 [...]
Re: Blank screen after boot with Radeon HD 5450
On Wed, May 31, 2017 at 2:06 PM, Allan Streib wrote: > I think you should try another monitor if at all possible. Perhaps your > monitor just goes into power-save mode with an incompatible signal. If and when I get my hands on another monitor I'll definitely try it out. (Although ultimately it would be nice to get it working with this one, as it works fine under Linux. This is a Dell U2515H.) > My xrandr shows the 2560x1440 mode at 59.95Hz, I'm assuming that's close > enough to 60Hz that it should work? Or could that be the problem? The > highest I can get working is 2048x1152. > > Screen 0: minimum 320 x 200, current 4096 x 1152, maximum 8192 x 8192 > DVI-0 connected primary 2048x1152+0+0 (normal left inverted right x axis y > axis) 553mm x 311mm >2560x1440 59.95 + >2048x1152 60.00* >1920x1200 59.95 >[...] You may be able to get a higher resolution by decreasing the refresh rate: $ gtf 2560 1440 33 # 2560x1440 @ 33.00 Hz (GTF) hsync: 48.44 kHz; pclk: 162.77 MHz Modeline "2560x1440_33.00" 162.77 2560 2688 2960 3360 1440 1441 1444 1468 -HSync +Vsync $ xrandr --newmode 2560x1440_33.00 162.77 2560 2688 2960 3360 1440 1441 1444 1468 -HSync +Vsync $ xrandr --addmode DVI-0 2560x1440_33.00 $ xrandr --output DVI-0 --mode 2560x1440_33.00
Re: Blank screen after boot with Radeon HD 5450
Maximilian Pichler writes: > If and when I get my hands on another monitor I'll definitely try it > out. (Although ultimately it would be nice to get it working with this > one, as it works fine under Linux. This is a Dell U2515H.) Interesting, that's the same model I have. You may be able to get a higher resolution by decreasing the refresh rate: $ gtf 2560 1440 33 # 2560x1440 @ 33.00 Hz (GTF) hsync: 48.44 kHz; pclk: 162.77 MHz Modeline "2560x1440_33.00" 162.77 2560 2688 2960 3360 1440 1441 1444 1468 -HSync +Vsync $ xrandr --newmode 2560x1440_33.00 162.77 2560 2688 2960 3360 1440 1441 1444 1468 -HSync +Vsync $ xrandr --addmode DVI-0 2560x1440_33.00 $ xrandr --output DVI-0 --mode 2560x1440_33.00
Re: Blank screen after boot with Radeon HD 5450
Sorry for the noise -- I hit send before I was finished formatting my prior reply. Maximilian Pichler writes: > If and when I get my hands on another monitor I'll definitely try it > out. (Although ultimately it would be nice to get it working with this > one, as it works fine under Linux. This is a Dell U2515H.) Interesting, that's the same model I have. > You may be able to get a higher resolution by decreasing the refresh rate: > > $ gtf 2560 1440 33 > > # 2560x1440 @ 33.00 Hz (GTF) hsync: 48.44 kHz; pclk: 162.77 MHz > Modeline "2560x1440_33.00" 162.77 2560 2688 2960 3360 1440 1441 > 1444 1468 -HSync +Vsync > > $ xrandr --newmode 2560x1440_33.00 162.77 2560 2688 2960 3360 1440 > 1441 1444 1468 -HSync +Vsync > $ xrandr --addmode DVI-0 2560x1440_33.00 > $ xrandr --output DVI-0 --mode 2560x1440_33.00 Yes, that actually worked! I tried first at 50Hz and it did not, but 33Hz is working at 2560x1440 (but not in console however, I don't know how to specify a different mode there, if it's even possible). Thanks! Allan
Re: Blank screen after boot with Radeon HD 5450
On Wed, May 31, 2017 at 3:44 PM, Allan Streib wrote: >> You may be able to get a higher resolution by decreasing the refresh rate: >> >> $ gtf 2560 1440 33 >> >> # 2560x1440 @ 33.00 Hz (GTF) hsync: 48.44 kHz; pclk: 162.77 MHz >> Modeline "2560x1440_33.00" 162.77 2560 2688 2960 3360 1440 1441 >> 1444 1468 -HSync +Vsync >> >> $ xrandr --newmode 2560x1440_33.00 162.77 2560 2688 2960 3360 1440 >> 1441 1444 1468 -HSync +Vsync >> $ xrandr --addmode DVI-0 2560x1440_33.00 >> $ xrandr --output DVI-0 --mode 2560x1440_33.00 > > Yes, that actually worked! I tried first at 50Hz and it did not, but > 33Hz is working at 2560x1440 (but not in console however, I don't know > how to specify a different mode there, if it's even possible). DVI limits the clock frequency to 165 MHz (the first number on the mode line). You may be able to go beyond that by using a DisplayPort cable instead.